P0305 code issue

[Trav]

Quote:
As I reported earlier I had an oil and filter changed by the dealership and then bought and put in a bottle of Gumout/Regain in the gas tank and LOL one week later I started having this problem!!!!



This maybe as simple as a bad plug or a weak coil.A weak plug can get fouled easily by fuel system cleaners.A weak coil doesn't put out enough to prevent a good plug from fouling.
Either way i think this is going to be a simple repair.

 

[Durango]

Trav,

Thank you for your most encouraging words/advice on the subject. I'll let everyone know the out come by saturday night.


Durango

 

[Durango]

Hi you all,

Just to let you all know that I had another mechanic ; look at my delima and it turns out that the coil packs, injectors and spark plugs work fine BUT the problem is the valve for the number 5 cylinder is stuck open due to excessive carbon build up. They told me the valve cover will have to come off and they can see and try and chemical clean the carbon off the stem to get the valve to close. That's why the cylinder has low compression. So this little fix will cost me about $800!!!Oh well I have nothing better to spend my money on during this part of the year HUH??

With any luck if everything goes the mechanic wayI should have my Durango back in one week. Wish and cross your finger for me once again.

Durango

 

[Bill in Utah]

Interesting. I'd think that if there was build up that it would be a issue all the time?

Keep us updated!

bill

 

[Burt]

Why $800 and a week? Do they have to take alot of stuff off to remove the valve cover? You sure they aren't pulling the head? Are you concerned that it will come back or stick on the other side soon? Could this be oil related?

 

[Durango]

Bill and Burt,

It's hard to say cuz now this is getting way out of my expertise on the engines internals. The other possibility he mentioned was it's possible the rocker arm may have come loose and perhaps it's rattleing around inside but claims there was nothing heard. In the meantime they won't know anything until they get the cover off and see how bad/carbon up the valve really is. Let's hope they can free the stuck valve and clean it chemically to operate.

As far as the price goes guys. Just to have the motor diagnosed cost me about $188. I can double that depending on what they find and correct using chemicals that are allowed in California only plus a new gasket and labor to put it back together.

Guys, right now I totally wish it wasn't that bad nor the price quoted but if it goes farther then I don't know what I'll do. My head gaskets are fine as he says so no warping is present and my gauges show everything is normal except for a loss in oil pressure a little. Their compression test show 45 lbs and not 30 lbs like the dealership showed. If the heads come off then he wants both sides to be sent out to the machine shop and rebuilt. That can cost thousands. If I pay less than $800 then I can live with that. Over a grand$ hard to swallow.

Thank you for helping me and will keept you in the loop as I hear it from the shop.

Durango

 

[Scott_Tucker]

Did they do a leak down test to determine that it was a valve? Did they do a wet compression test in addition to a dry compression test? Which valve did they say it was? It would be highly unusual for 'carbon buildup' to cause a valve to hang open unless the valve guides were shot and passing huge quantities of oil.

 

[Scienceman]

Well, even though that is a good amount of money, it still could be worse!

 

[Vikas]

As long as *you* think the guy is honest, pay him the money. I had already told you that he was going to charge you to just look at it based upon the reviews I had seen on the google of your new mechanic.

Personally, I would have chosen another route but that is now water under the bridge :-(

What do you have right now with you for your $188? Do you have a written report giving he breakdown of that money? I am afraid that this saga is unfolding exactly as I had envisioned. I am going stop making any further armchair diagnostic and second guessing your mechanic now. I am glad he is NOT my mechanic!

- Vikas

 

[Durango]

Vikas,

I don't know exactly what type of compression test they did but their numbers were 45lbs instead of the 30lbs the dealership quoted me. One thing is for sure two mechanics report my compression is way down so for me that's evidence enough to go forward so tomorrow they'll remove the valve cover and look at the stem for any carbon scoring. He also did mention something about the possibility of the rocker arm falling off. If so that's a mystery too me.

I do know that I saw on another website a person has an 01 Durango 4.7 V-8 and for some reason his rocker arm and bearing fell apart inside the cover.

let's play this out a bit and see what they tell me this week. I do know for sure as they report all electric of the engine are fine. It appears for now the issue is more mechanical in nature.
Let's hope the report isn't as bad as I think/thought and repairs are swift. I really miss my truck.

Durango

 

[The_Eric]

How did the new mechanic come to the conclusion that your number 5 cylinder was low on compression? Did you offer any info, like that you took it to the dealer and they told you it was low? Or did you just say "The check engine light is on, are you able to diagnose it and fix it?"

 

[CBR.worm]

Italian tune up time! Of course if there is a mechanical problem this could hasten it's demise,

If there is that much carbon I would be inclined to pull the heads and do a valve job. Probably pretty expensive to have a shop do that though.

It could just be a little piece of carbon on the valve or seat that is keeping a valve from seating, maybe that's what they are expecting. I am not sure what a chemical cleaning consists of.

 

[Durango]

The Eric,

My CEL light first came on and when I took it to the dealership to look at that when they told me that the cause of the CEL to light up was because of low compression on the no. 5 cylinder.

CBR.Worm,

I mentioned nothing to the second mechanic about any low compression problems at all but I did tell them the code the CEL threw at me. If it's only a small piece of carbon holding the valve open then I can live with that!!! I just don't want the engine to become a big surprise/issue to me when they remove the valve cover cuz I've taken good care of this motor dispite the other postings from other forums about how poorly designed the 4.7. 5.2 and the 5.9 liter engines are. If you go to forums spefically for Dodge cars/trucks only you'll see the issues going on other peoples engines. My services are always done on time and to the book and despite the cost that it could incure I never slack on any part. If all it needs is some type of internal engine cleaning then that's fine with me.

Today is the day they'll remove the cover and should have a report by tomorrow. With any hope it'll be repaired/fixed by Friday.


Durango

 

[VNTS]

Sometimes they build up carbon on the valves and spit out the rockers. My pal is Dodge tech and says he sees this from time to time on 3.7 and 4.7s driven around town.

He recommends a injector service. I saw him do one on a Jeep with a 3.7. Came in idling really poorly and the engine had a sever clacking. He said that it is probably the valve not closing because of build up. He brought out his kit with Wynns cleaner and unhooks the fuel feed at the rail, and hooks up the kit with a compressed air feed. Fires the thing up and it took about 10 minutes to consume the concoction. Shut it down and reattached the fuel line. Then he took it for a spin and brought it back in.
Quiet as mouse and idling real smooth, couldnt believe it. He then changed the oil. Jeep had about 20K miles on it and was former off lease one they had sold a year earlier as a used. he dumped the oil and said these injector services work well on stuff like this, cleans everything right out. He said probably driven around town with short trips.

 

[Durango]

VNTS,

I hope that's all I need to cure my issue. The mechanice told me he hears no clacking in anyway but he fears something is up with the valve and MAYBE some issue with the rocker.

As far as the chemical is concern he says he has to use a pre-approved concoction for Californians. Since your buddy is in NE the smog laws are different.

If you talk to my buddy can you tell him about my issue and ask him when he recommends???? It sounds like this man know what he's doing so let's wait and see what his report is also.

This thing is just killing me! Here's I spend good money and am always on schedule and that lousey warning light comes on. In a way I can't live without it because of the good it does but when it comes on it cost me mo money.

Durango

 

[VNTS]

If you go to a mopar dealer they use mopar injector cleaner and they have the kit to dose the cleaner into the fuel rail. In this case, my friend uses some chemicals from Wynns that utilize the mopar kit to do the same service, he said they are the same chemical. It does not have anything to do with SMOG, I assume a mopar dealer in CA could offer you the same injector service. As I said the concoction runs the engine for about 10 minutes and hooks up to the fuel rail and is dosed with compressed air.

http://www2.prnewswire.com/cgi-bin/stori...4493&EDATE=



Originally Posted By: Durango
VNTS,

I hope that's all I need to cure my issue. The mechanice told me he hears no clacking in anyway but he fears something is up with the valve and MAYBE some issue with the rocker.

As far as the chemical is concern he says he has to use a pre-approved concoction for Californians. Since your buddy is in NE the smog laws are different.

If you talk to my buddy can you tell him about my issue and ask him when he recommends???? It sounds like this man know what he's doing so let's wait and see what his report is also.

This thing is just killing me! Here's I spend good money and am always on schedule and that lousey warning light comes on. In a way I can't live without it because of the good it does but when it comes on it cost me mo money.

Durango

 

[Durango]

Hey guys,

Well the report is not good. :-( They told me my intake valve is BURNT and they can't get it free so it's stuck big time. They did a wet down test in addition and said 60% of my compression is going down the tube.

Both heads will have to be removed and re-machined and magna fluxed or something like that. I'll have it back in a couple weeks as they said.

Perhaps when they tear it down more info can be found BUT that for sure now what they observed.

Durango

 

[Vikas]

With 80K miles on the clock and regularly serviced engine, the chances of the needing such a huge repairs are minuscule. Can you get the pictures?

I will come clean and ask you point blank. How in the world would you know if they are snowing you?

- Vikas

 

[Durango]

Vikas,

I have two mechanics say the compression is not up to spces. Bother report compression close to each other so if the other cylinders are not even close to the no. 5 cylinder. I'd say that's pretty convincing to me. I mean how many mechanics do you believe I need to see??? Ellectrically everything else is fine but mechanically something went bad inside the engine.

Let me come clean back to you..... What makes you think these guys are ripping me off? They're AAA rated/approved. Not good enough for you?

Durango

 

[Scott_Tucker]

I have been diagnosing cars professionally for over 20 years and have seen similar situations quite a few times. It's nothing you did to make it wear quickly, it was probably just excessive guide to stem clearance or something that made it wear out early and burn. Unfortunately that's how it goes sometimes.