Calling all Tech's !
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Calling all Tech's !
Wednesday afternoon around 4 pm I put 2 cans of GM Top Engine cleaner in thru my PCV to clean out any build up. (This stuff evidently is pretty highly regarded and so I went ahead. I have 59000 miles on my car - 98 coupe). I blew it all out last night and brought the car in today to have the engine oil, tranny oil and differential oil all changed. (I also had the back up light switch replaced). Now I have a problem. I pick up the car, everything is all changed, I start the car to leave the dealership and the check engine light comes on. Its idling a bit rough and when they scan it, the left and right banks are now reporting a lean condition. The tech there doesn't have any idea what it might be...I did not mention to them I did the engine treatment. Anybody have either similar problems or suggestions on what it could be? He cleared the code and in the 15 minutes after that, the code did not come back on. BUT, it still is idling a tad rough.. Thoughts anybody?
Instructor
Joined: Jun 2002
Posts: 212
Likes: 0
From: Pottstown PA
Re: Calling all Tech's ! (webdzynes)
Did you replace the plugs after doing the top end cleaner? If I remember correctly, its recommended that you do. I used the liquid, not spray, and used the engine vacuum to suck it out of the can, then shut it down, letting it sit overnight. In the morning, I ran it to blow everything out and then changed out the plugs. It was a while ago, but I'm pretty sure that it was also idling rough before changing the plugs.
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (Mike00FRC)
No I didn't. I had changed them last year and no-one mentioned that as a "must do" for this procedure. On the scan, all plugs were firing fine...
Le Mans Master
Joined: Oct 2000
Posts: 6,507
Likes: 722
From: Sausalito CA
Re: Calling all Tech's ! (webdzynes)
If nothing else changed, I'd vote carbon residue on a plug.
Perhaps loose plug wire, or loose tip on the top of the plug
Else, maybe air/ intake leak.
Do a few high rpm drives and see if it improves.
Perhaps loose plug wire, or loose tip on the top of the plug
Else, maybe air/ intake leak.
Do a few high rpm drives and see if it improves.
Melting Slicks
Joined: Nov 1999
Posts: 2,347
Likes: 857
From: MI
Cruise-In VI Veteran
Re: Calling all Tech's ! (Kenny94945)
:iagree:
Change the plugs first.
And if you can, please post the codes the Tech got. I/m thinking that an O2 sensor may have gotten trashed (but I need the codes to confirm).
Kevin
:iagree:
Change the plugs first.
And if you can, please post the codes the Tech got. I/m thinking that an O2 sensor may have gotten trashed (but I need the codes to confirm).
Kevin
:iagree:
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (69)
:iagree:
Change the plugs first.
And if you can, please post the codes the Tech got. I/m thinking that an O2 sensor may have gotten trashed (but I need the codes to confirm).
Kevin
:iagree:
Change the plugs first.
And if you can, please post the codes the Tech got. I/m thinking that an O2 sensor may have gotten trashed (but I need the codes to confirm).
Kevin
:iagree:
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Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (speedyc5)
You or the tech could get the codes from the DIC. I' m sure he read the codes and relayed to you what he thought they said!!
:flag :flag :flag :flag
:flag :flag :flag :flag
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (speedyc5)
If he didn't reset the DIC the codes will still be posted. Do you have the vette in your garage??
No, the car is still at the dealers. They plan on "looking into it" first thing in the morning. ANY thoughts or suggestions you have are VERY welcome.
Racer
Joined: May 2000
Posts: 373
Likes: 20
From: NW Indiana
Cruise-In II Veteran
Re: Calling all Tech's ! (speedyc5)
Speedyc5, a code 0430 is a bank 2 inefficient cat code. Bank 2 in the passenger side one. I know this because my truck got a code 0420 which is a bank 1 inefficient cat code. I got this after 2 cylinders quit firing for about 20 miles. Must have loaded the cat with unburnt fuel. I looked at the o2's with autotap. Displayed them as a gauge and it showed the problem well. I put 2 bottles of heat with premium fuel and after about a week I reset the check engine light and it has not come back. You need to run a little hotter to burn out the cat. Hopefully this will help ya.
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (bowtiebandit)
If it's running lean it sounds like you may have a vacuum leak somewhere.
Make sure the PCV hose is still in one piece and hasn't disintegrated.
Make sure the PCV hose is still in one piece and hasn't disintegrated.
[Modified by webdzynes, 8:16 AM 11/29/2003]
Thread Starter
Safety Car
Joined: Dec 2000
Posts: 4,166
Likes: 14
From: Orlando Fl
Re: Calling all Tech's ! (webdzynes)
just talked with the dealer tech and all he says is "I dont really know. I'm gonna have a look at the fuel filter first and go from there...". There must be a better way! :cry