When’s the last time you gave it a WOT?

 

I haven’t yet. Should I do it with the car on or off?

 

Wide open throttle can only be done with the car on.

Do a search for “WOT” on this forum. If you decide to do it, check your air filter 1st just to make sure it’s in good condition and not so bad that it’s actually the cause of your problem. Next make sure your oil level is full where it should be. And do it on a warm engine.

 

I have a 2003 Deville(Base) and it started running rough 2 days ago. As soon as I start the car it’s idling low. I give it gas and when the rpm’s come down it will stall out on me. I pulled the codes and this is what I got:

IPC-B1004, B1438, U1000

IPM- B0429, B1004

PCM- p0506, p0621, p1189, B3832

RCC- B1009

RIM- C0660

SDM- B0041


Any help would be greatly appreciated

-Jordan

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you probably need to clean the TB - Throttle Body and the IAC - Idle Air Control solenoid -
DON'T FORGET to clean the little air hole the IAC uses

 

PLEASE post the code definitions when you post! There are 18000 possible codes, no-one knows them all and most folks will skip over your post rather than look them up. Welcome to the Forum!

 

yeah, that^^^ always post definitions. As for the WOT, you can't do it in park or neutral, because the computer limits you to 4000rpm. Find some deserted road, put it in low, stand on it and when you're almost at redline, let off the gas. If you see a puff of smoke out the exhaust, do it again. I do mine at least once a month. IIRC, redline on your base is 5900.

 

I will post definitions for the codes next time.. sorry about that. I did the WOT and also cleaned the throttle body and IAC and that seemed to take care of the problem. Thank you all for your help

 

That’s great news. Glad your car’s running better.