Specifically this happens after a long period of closed throttle engine braking when I push in the clutch before coming to a stop. It idles fine normally and will start right up after dying. Also, engine braking down a steep hill will make it want to backfire. Otherwise it seems to run good when cruising or when on the gas. The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Car dies when I push in the clutch
- Thread starter Fsharp
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"Doctor, it hurts when I do this."
"Well don't do that."
Wonder if it's loading up, going super rich and flooding out (if not flooding then just too rich to run).
When you say "backfire" might it be popping out the exhaust? Could be air leak in the exhaust. With a carb it tends to go rich in engine overrun, and an air leak can with super hot exhaust can ignite. Or so I've been told.
"Well don't do that."
Wonder if it's loading up, going super rich and flooding out (if not flooding then just too rich to run).
When you say "backfire" might it be popping out the exhaust? Could be air leak in the exhaust. With a carb it tends to go rich in engine overrun, and an air leak can with super hot exhaust can ignite. Or so I've been told.
Does that carb have a choke? If so it could be that the choke is not working correctly.
If you have some sort of dashpot or idle bumper-upper I'd monkey with that. Something that detects extreme vacuum and cracks the idle more.
I agree with the rich/flood hypothesis.
I gotta ask how that Toyota engine hauls the Lincoln around.
I agree with the rich/flood hypothesis.
I gotta ask how that Toyota engine hauls the Lincoln around.
I have a Yamaha motorcycle, fuel injected, that would do the same thing after a few seconds of engine braking and then pull in the clutch: engine dies. The next model year engine computer supposedly fixed that problem. Somehow it was a funky riding technique I used when I first got the bike- I quickly learned not to do the odd throttle / clutch position that caused the problem. I doubt it will help you in your case, but thought I would mention it.
That is an interesting combination of car and engine: I would be interested in hearing the back-story on how it came into existence.
That is an interesting combination of car and engine: I would be interested in hearing the back-story on how it came into existence.
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I would start with checking valve clearances, carb settings and ignition components.
BC.
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I would start with checking valve clearances, carb settings and ignition components.
BC.
If Yotas use the clutch switch, ilke hondas do, your ecm needs that inout?
Originally Posted By: Bladecutter
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I recall an incident with Prizm's getting Toyota powerplants, but that was long ago.
lol
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I recall an incident with Prizm's getting Toyota powerplants, but that was long ago.
lol
Originally Posted By: supton
Originally Posted By: Bladecutter
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I recall an incident with Prizm's getting Toyota powerplants, but that was long ago.
lol
Fords prefer Nissan
Originally Posted By: Bladecutter
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor. Any ideas on what it might be? Carburetor settings? Timing? Other?
Someone put the wrong engine in your Lincoln.
I've seen Ford plants make mistakes at the factory before, but nothing like this.
I recall an incident with Prizm's getting Toyota powerplants, but that was long ago.
lol
Fords prefer Nissan
Thanks for the replies guys. Loading up and getting too rich from the extra vacuum seems likely. I'm going to lean out the idle some and see what effect that has. I might also go down a step or two in main jet size.
Someone mentioned it might not be getting enough fuel, but I think it is it has an electric fuel pump and a low psi regulator keeping it at 2.5psi which is necessary for the 97.
Originally Posted By: CT8
what has the maintenance schedule been?
For the car: sitting 20 years in a backlot. For the engine: living in someone's Toyota rock crawler.
Originally Posted By: dishdude
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor.
You gotta post some pictures...please!!
I'll try and take some in its current, running form.
The car runs pretty good otherwise, but the diff is geared too high 2.75:1 when I need 4.33:1 or lower. It's easier to run around town in 4-lo
When I bought the car I found out it needed to have the engine rebuilt, so I just looked on Craigslist for a handy engine and transmission to put in there. I figured might as well do something a little different while I was at it. The engineering challenges have been part of the fun for sure!
Someone mentioned it might not be getting enough fuel, but I think it is it has an electric fuel pump and a low psi regulator keeping it at 2.5psi which is necessary for the 97.
Originally Posted By: CT8
what has the maintenance schedule been?
For the car: sitting 20 years in a backlot. For the engine: living in someone's Toyota rock crawler.
Originally Posted By: dishdude
Originally Posted By: Fsharp
The car in question is a bit of a mash up, a Lincoln MarkIV with a Toyota 20r engine and Stromberg 97 carburetor.
You gotta post some pictures...please!!
I'll try and take some in its current, running form.
The car runs pretty good otherwise, but the diff is geared too high 2.75:1 when I need 4.33:1 or lower. It's easier to run around town in 4-lo
When I bought the car I found out it needed to have the engine rebuilt, so I just looked on Craigslist for a handy engine and transmission to put in there. I figured might as well do something a little different while I was at it. The engineering challenges have been part of the fun for sure!
I would also check if the float setting isn't too high.
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