I think i did something bad =/
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he did read up on it....see Danh's post #2988066:
"Agree it's a non-issue. But if it bothers you, another approach is to hold the accelerator to the floor (which shuts off the fuel supply) and crank the engine for 10 seconds or so. This should at least start filling the filter with oil before start-up."
He read it and tried it and yet he gets flamed for it by some....he was trying to learn something. Not everyone in here is a pro.
Quest gave some good advice gregk24....take it slow and learn from others. You did nothing to harm your engine this time.
Some of the "advice" you receive in here requires you to sort out the fly-poop from the pepper. You'll notice the regulars in here soon enough and you'll be able to pick out the good ones from the marginal ones.....the good ones can almost always be trusted. Just remember it's hard for them to see what you're describing sometimes so be patient too.
"Agree it's a non-issue. But if it bothers you, another approach is to hold the accelerator to the floor (which shuts off the fuel supply) and crank the engine for 10 seconds or so. This should at least start filling the filter with oil before start-up."
He read it and tried it and yet he gets flamed for it by some....he was trying to learn something. Not everyone in here is a pro.
Quest gave some good advice gregk24....take it slow and learn from others. You did nothing to harm your engine this time.
Some of the "advice" you receive in here requires you to sort out the fly-poop from the pepper. You'll notice the regulars in here soon enough and you'll be able to pick out the good ones from the marginal ones.....the good ones can almost always be trusted. Just remember it's hard for them to see what you're describing sometimes so be patient too.
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Originally Posted By: gregk24
Sorry for all the questions guys, but i know you are all knowledgeable thats why i come here. Just about 10 minutes ago i was testing to see if my car had the feature where if you floor the gas peddle when starting your car the fuel cuts out...well turns out my car doesnt have that feature and it revved to 4,000 rpm!!
The engine was already warmed up prior to doing this, but had been sitting for about 5 minutes, i floored the gas upon start up and it immediately shot up to 4k. I know this wasnt good...but was it bad? would this cause any damage? thanks again!
If you had redlined this engine as soon as you started it on a very cold day, then it would be a problem.
Sorry for all the questions guys, but i know you are all knowledgeable thats why i come here. Just about 10 minutes ago i was testing to see if my car had the feature where if you floor the gas peddle when starting your car the fuel cuts out...well turns out my car doesnt have that feature and it revved to 4,000 rpm!!
If you had redlined this engine as soon as you started it on a very cold day, then it would be a problem.
I did this on my Cherokee after an oil change. I was used to Fords where you could do this. Didn't work on the cherokee and it raced right up to 3000RPM! Engine is still in one piece, though.
We used to have to do this on my parents '08 Wrangler to keep it from knocking on cold mornings. Crank for a minute and it would circulate some oil.
We used to have to do this on my parents '08 Wrangler to keep it from knocking on cold mornings. Crank for a minute and it would circulate some oil.
Originally Posted By: V8man
If you had redlined this engine as soon as you started it on a very cold day, then it would be a problem.
No it wouldn't, what gives you that idea?
We saw Ford's torture testing where the engine is kept in a freezer and is started COLD, like -30F cold and redlined immediately. This is repeated over and over.
I'm sure all other manufacturers do similar tests.
This one incident is absolutely nothing to worry about.
If you had redlined this engine as soon as you started it on a very cold day, then it would be a problem.
No it wouldn't, what gives you that idea?
We saw Ford's torture testing where the engine is kept in a freezer and is started COLD, like -30F cold and redlined immediately. This is repeated over and over.
I'm sure all other manufacturers do similar tests.
This one incident is absolutely nothing to worry about.
My 2000 Grand Marquis and my '03 Marauder both have this feature. The Marauder sits all winter and I use the same procedure to start it every spring. I assumed all fuel-injected cars do this...maybe it's only Ford?
Probably did no harm, but there is a chance the engine could fall out any day now.
this how I look at it: it happened, what's done is done. No sense in driving yourself crazy worrying about it. Just hope that it didn't do any damage and forget about it.
I seriously doubt you did any real damage anyway.
I seriously doubt you did any real damage anyway.
Hmm, what's worse:
a "dry-start" with no oil filter pre-fill after an oil change
or
revving to 4k on start-up with a warm engine
Sohpie's BITOGer's choice
a "dry-start" with no oil filter pre-fill after an oil change
or
revving to 4k on start-up with a warm engine
Nah, you're fine. I wouldn't do it every day, though.
If it was warm and only off for 5 minutes, there was probably some oil left on the moving parts..
If it was warm and only off for 5 minutes, there was probably some oil left on the moving parts..
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Originally Posted By: gregk24
Originally Posted By: ram_man
Your going to get [censored] if you ask questions like that......they were a little harsh but do think a little ask yourself a couple questions. Was it warm if so oil is through out the engine.... your engine redlines well above 4, 000 so didn't stress anything there. So now you have the question of as starting a boom 4, 000 grand well obviously that isn't a optimal thing to do but 1 time wont hurt it heck 50 times wouldn't. So use a little knowledge and common sense to do some reasoning before asking a question like this otherwise you'll get flack everytime.
my bad ram....im just so paranoid about my car....its my first nice car and its seems to be in good shape for the most part. i want/need it to last another 50-100k miles. so im a bit anal about it
Its all good. No harm no foul. You'll learn more as you go and get better and better at figuring stuff out. I did the same thing in my civic and a few weeks ago. And it doesn't do clear flood mode either. Just revs way up. By the way at the risk of getting flamed your talking about a honda it would take more than that to kill a honda now if it was an old gm or ford four banger that kinda revving could kill them since theyre so well built
I'm of course kidding..... mostly.
Originally Posted By: ram_man
Your going to get [censored] if you ask questions like that......they were a little harsh but do think a little ask yourself a couple questions. Was it warm if so oil is through out the engine.... your engine redlines well above 4, 000 so didn't stress anything there. So now you have the question of as starting a boom 4, 000 grand well obviously that isn't a optimal thing to do but 1 time wont hurt it heck 50 times wouldn't. So use a little knowledge and common sense to do some reasoning before asking a question like this otherwise you'll get flack everytime.
my bad ram....im just so paranoid about my car....its my first nice car and its seems to be in good shape for the most part. i want/need it to last another 50-100k miles. so im a bit anal about it
Its all good. No harm no foul. You'll learn more as you go and get better and better at figuring stuff out. I did the same thing in my civic and a few weeks ago. And it doesn't do clear flood mode either. Just revs way up. By the way at the risk of getting flamed your talking about a honda it would take more than that to kill a honda now if it was an old gm or ford four banger that kinda revving could kill them since theyre so well built
Dude, I would rev my engine to redline sitting still. It will survive. People need to realize that engines are NOT fragile. They are built to take punishment. Seriously, think about it. If the engine would be damaged by revving to 4k (which is the fuel cut off limit for most engines in park/neutral btw) how the heck would it survive revving to redline or hauling a whole car down teh road and up mountains for hundreds of thousands of miles. We aren't talking about you sitting above redline for hours upon hours. 4k isn't even that high. Some engines spin that fast just driving down the highway in top gear.
+1.....Engines are TOUGH!
I don't know how to link it....interesting read:
One Second in the Life of a Racer
by Tom Fey
The Unlimiteds go flashing through the racecourse, engines howling, air shearing, heat waves streaming. Four hundred eighty miles an hour is 8 miles a minute, and the elite racers take about 70 seconds to cover the 9.1 mile Reno course. If you could take a souped P-51 racer flying the circuit at Reno, slow time down, and examine just one second, what would you find?
In that one second, the V-12 Rolls-Royce Merlin engine would have gone through 60 revolutions, with each of the 48 valves slamming open and closed 30 times. The twenty four spark plugs have fired 720 times. Each piston has traveled a total of 60 feet in linear distance at an average speed of 41 miles per hour, with the direction of movement reversing 180° after every 6 inches. Three hundred and sixty power pulses have been transmitted to the crankshaft, making 360 sonic booms as the exhaust gas is expelled from the cylinder with a velocity exceeding the speed of sound. The water pump impeller has spun 90 revolutions, sending 4 gallons of coolant surging through the engine and radiators. The oil pumps have forced 47 fluid ounces, roughly one-third gallon, of oil through the engine, oil cooler, and oil tank, scavenging heat and lubricating the flailing machinery. The supercharger rotor has completed 348 revolutions, its rim spinning at Mach 1, forcing 4.2 pounds or 55 ft³ of ambient air into the combustion chambers under 3 atmospheres of boost pressure. Around 9 fluid ounces of high octane aviation fuel, 7,843 BTUs of energy, has been injected into the carburetor along with 5.3 fluid ounces of methanol/water anti-detonant injection fluid. Perhaps 1/8 fluid ounce of engine oil has been either combusted or blown overboard via the crankcase breather tube. Over 1.65 million foot pounds of work have been done, the equivalent of lifting a station wagon to the top of the Statue of Liberty.
In that one second, the hard-running Merlin has turned the propeller through 25 complete revolutions, with each of the blade tips having arced through a distance of 884 feet at a rotational velocity of 0.8 Mach. Fifteen fluid ounces of spray bar water has been atomized and spread across the face of the radiator to accelerate the transfer of waste heat from the cooling system to the atmosphere.
In that one second, the aircraft itself has traveled 704 feet, close to 1/8 mile, or roughly 1.5% of a single lap. The pilot's heart has taken 1.5 beats, pumping 5.4 fluid ounces of blood through his body at a peak pressure of 4.7 inches of mercury over ambient pressure. Our pilot happened to inspire during our measured second, inhaling approximately 30 cubic inches (0.5 liter) of oxygen from the on-board system, and 2.4 million, yes million, new red blood cells have been formed in the pilot's bone marrow.
In just one second, an amazing sequence of events have taken place beneath those polished cowlings and visored helmets. It's the world's fastest motorsport. Don't blink!
--------------------------------------------------------------------------------
Send mail to with questions or comments about this web site.
Copyright © 2002-2013 Aircraft Engine Historical Society, Inc.
I don't know how to link it....interesting read:
One Second in the Life of a Racer
by Tom Fey
The Unlimiteds go flashing through the racecourse, engines howling, air shearing, heat waves streaming. Four hundred eighty miles an hour is 8 miles a minute, and the elite racers take about 70 seconds to cover the 9.1 mile Reno course. If you could take a souped P-51 racer flying the circuit at Reno, slow time down, and examine just one second, what would you find?
In that one second, the V-12 Rolls-Royce Merlin engine would have gone through 60 revolutions, with each of the 48 valves slamming open and closed 30 times. The twenty four spark plugs have fired 720 times. Each piston has traveled a total of 60 feet in linear distance at an average speed of 41 miles per hour, with the direction of movement reversing 180° after every 6 inches. Three hundred and sixty power pulses have been transmitted to the crankshaft, making 360 sonic booms as the exhaust gas is expelled from the cylinder with a velocity exceeding the speed of sound. The water pump impeller has spun 90 revolutions, sending 4 gallons of coolant surging through the engine and radiators. The oil pumps have forced 47 fluid ounces, roughly one-third gallon, of oil through the engine, oil cooler, and oil tank, scavenging heat and lubricating the flailing machinery. The supercharger rotor has completed 348 revolutions, its rim spinning at Mach 1, forcing 4.2 pounds or 55 ft³ of ambient air into the combustion chambers under 3 atmospheres of boost pressure. Around 9 fluid ounces of high octane aviation fuel, 7,843 BTUs of energy, has been injected into the carburetor along with 5.3 fluid ounces of methanol/water anti-detonant injection fluid. Perhaps 1/8 fluid ounce of engine oil has been either combusted or blown overboard via the crankcase breather tube. Over 1.65 million foot pounds of work have been done, the equivalent of lifting a station wagon to the top of the Statue of Liberty.
In that one second, the hard-running Merlin has turned the propeller through 25 complete revolutions, with each of the blade tips having arced through a distance of 884 feet at a rotational velocity of 0.8 Mach. Fifteen fluid ounces of spray bar water has been atomized and spread across the face of the radiator to accelerate the transfer of waste heat from the cooling system to the atmosphere.
In that one second, the aircraft itself has traveled 704 feet, close to 1/8 mile, or roughly 1.5% of a single lap. The pilot's heart has taken 1.5 beats, pumping 5.4 fluid ounces of blood through his body at a peak pressure of 4.7 inches of mercury over ambient pressure. Our pilot happened to inspire during our measured second, inhaling approximately 30 cubic inches (0.5 liter) of oxygen from the on-board system, and 2.4 million, yes million, new red blood cells have been formed in the pilot's bone marrow.
In just one second, an amazing sequence of events have taken place beneath those polished cowlings and visored helmets. It's the world's fastest motorsport. Don't blink!
--------------------------------------------------------------------------------
Send mail to with questions or comments about this web site.
Copyright © 2002-2013 Aircraft Engine Historical Society, Inc.
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Originally Posted By: Quattro Pete
Originally Posted By: gregk24
Just about 10 minutes ago i was testing to see if my car had the feature where if you floor the gas peddle when starting your car the fuel cuts out...
What? Never heard of that.
A lot if not all EFI cars do have a "flood clear" algorithm that mimics holding the pedal to the floor while cranking a carb'd car. But that is NOT the same as "cutting the fuel." It leans it out... if the engine is warm enough to start on a lean mixture (and obviously lot actually flooded due to a leaky injector or other issue) then it'll start and rev up against the rev-limiter... as was learned here.
To the original poster... if you're so 'anal' about making this car last, then ask FIRST before risking a bonehead award based on what you think maybe you once heard might be true. Most if not all of us who've been tinkering with cars for years have done things like this, but usually we learned on beaters as kids, not on our first nice car. I don't think you harmed anything in this case, but you're idea of cranking it with the pedal to the floor right after an oil change WOULD be a bad idea... When uncertain, don't do anything extra. For example, if you're in doubt aobut whether you should build oil pressure by extended cranking after an oil change or not... the SAFE choice is to do nothing special. The automakers build things to take the simplest approach to most maintenance. Nobody makes an engine that will suffer greatly if you don't fill the filter and then crank for an extended time.
Originally Posted By: gregk24
Just about 10 minutes ago i was testing to see if my car had the feature where if you floor the gas peddle when starting your car the fuel cuts out...
What? Never heard of that.
A lot if not all EFI cars do have a "flood clear" algorithm that mimics holding the pedal to the floor while cranking a carb'd car. But that is NOT the same as "cutting the fuel." It leans it out... if the engine is warm enough to start on a lean mixture (and obviously lot actually flooded due to a leaky injector or other issue) then it'll start and rev up against the rev-limiter... as was learned here.
To the original poster... if you're so 'anal' about making this car last, then ask FIRST before risking a bonehead award based on what you think maybe you once heard might be true. Most if not all of us who've been tinkering with cars for years have done things like this, but usually we learned on beaters as kids, not on our first nice car. I don't think you harmed anything in this case, but you're idea of cranking it with the pedal to the floor right after an oil change WOULD be a bad idea... When uncertain, don't do anything extra. For example, if you're in doubt aobut whether you should build oil pressure by extended cranking after an oil change or not... the SAFE choice is to do nothing special. The automakers build things to take the simplest approach to most maintenance. Nobody makes an engine that will suffer greatly if you don't fill the filter and then crank for an extended time.
to start:
instead of some old tricks back in the days of yore RE: carb'ed cars, esp. those that the carb is out of tune... where sometimes you have to give it a couple of pumps before you crank start the engine, almost all EFI engine designs (or even mechanical FI such as the ones used in VeeDoubleU Rabbits) have their cold-start mixture carefully calibrated, so all you have to do is to get in, turn the key and crank the engine and that's it. There's rarely a flooded engine to clear these days (granted, that the systems in proper working order: i.e. no bad injectors, fuel rail pressure within specs, all other working portions such as ignition components, timing, coolant temperature senor, crank angle sensor, etc. are all working properly).
Again, like I said before: read up on some solid/consistent BITOG contributor's postings and learn from it. You'll wise up fairly quickly afterwards..
Q.
instead of some old tricks back in the days of yore RE: carb'ed cars, esp. those that the carb is out of tune... where sometimes you have to give it a couple of pumps before you crank start the engine, almost all EFI engine designs (or even mechanical FI such as the ones used in VeeDoubleU Rabbits) have their cold-start mixture carefully calibrated, so all you have to do is to get in, turn the key and crank the engine and that's it. There's rarely a flooded engine to clear these days (granted, that the systems in proper working order: i.e. no bad injectors, fuel rail pressure within specs, all other working portions such as ignition components, timing, coolant temperature senor, crank angle sensor, etc. are all working properly).
Again, like I said before: read up on some solid/consistent BITOG contributor's postings and learn from it. You'll wise up fairly quickly afterwards..
Q.
Originally Posted By: Rock_Hudstone
Now, if it was stone cold on a winter morning there might be cause for concern.
Heh, should try -40 Canadian winter, hearing someones car slowly lug over and the instant it fires, the engine roaring to 4500 RPM or so, throttling back and forth, by some idiot proudly hammering the [censored] out of the motor to "warm 'er up".
Somehow the engine survives that but I'm sure it'll have a hard life with the driver it has.
Now, if it was stone cold on a winter morning there might be cause for concern.
Heh, should try -40 Canadian winter, hearing someones car slowly lug over and the instant it fires, the engine roaring to 4500 RPM or so, throttling back and forth, by some idiot proudly hammering the [censored] out of the motor to "warm 'er up".
Somehow the engine survives that but I'm sure it'll have a hard life with the driver it has.
Have to agree that revving the engine to 4k didn't hurt it.
If revving engines with no load was bad for them, then the neighbor "kid" next door would have blown up every vehicle he has owned/borrowed/worked on.....etc.
I fully expected him to blow a 302 up in an 80s Mustang a few times. That engine was screaming!
If revving engines with no load was bad for them, then the neighbor "kid" next door would have blown up every vehicle he has owned/borrowed/worked on.....etc.
I fully expected him to blow a 302 up in an 80s Mustang a few times. That engine was screaming!
Many FI injected cars do have "clear-flood" mode when the gas pedal is held to the floor while starting the car. Unfortunately, unless one has the schematics, it would be difficult to know.
In any case, that mode is applicable *only* while the engine is cranking. So, once the car starts, the gas pedal needs to be let go instantly. Unless you have throttle by wire, the gas pedal controls the throttle opening directly. If you open the throttle plate, more air is going to enter the engine which will cause the engine to rev.
Bottom Line:-
==============
Whatever happened, it is too late to go back in the time. You still don't know if your car does have "clear-flood" mode or not.
In any case, that mode is applicable *only* while the engine is cranking. So, once the car starts, the gas pedal needs to be let go instantly. Unless you have throttle by wire, the gas pedal controls the throttle opening directly. If you open the throttle plate, more air is going to enter the engine which will cause the engine to rev.
Bottom Line:-
==============
Whatever happened, it is too late to go back in the time. You still don't know if your car does have "clear-flood" mode or not.
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