cutlasssupremeking Posted November 19, 2009 Report Share Posted November 19, 2009 So, I am getting these Codes from my '91 Oldsmobile Cutlass Supreme 3.1L V6: 22, 33, 35, 44, 45. What do these mean? Where can I get a list of what these OBD-I codes mean? And most importantly, how do I get my car working again? Here are my symptoms: - car starts very rough and only if I hold down the gas pedal for 5+ seconds - car runs at high RPMs, then low RPMs(as if it is going to die, and does die most of the time unless I keep pressing down on the gas pedal at least a little) - performs great while accelerating, but wants to die when idling at a stop light or stop sign - BONUS: sometimes my car dies while coasting(not accelerating) on the free way traveling at 30mph Other Notes: - I just replaced the EGR Valve and cleaned out the carbon deposits from the port - I just replaced what I think is the Vacuum Hose Thanks for your help, Darryl Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted November 19, 2009 Report Share Posted November 19, 2009 Check your MAP sencer Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 19, 2009 Author Report Share Posted November 19, 2009 How do I check the MAP sensor? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 If you can get it to idle, tap the sensor firmly while it's running and see if it makes a difference. Also check for cracks in the housing, as well as the vacuum line fitting on the bottom of it. Quote Link to comment Share on other sites More sharing options...
AL Posted November 19, 2009 Report Share Posted November 19, 2009 Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 44 AND 45? Lol, strange. Quote Link to comment Share on other sites More sharing options...
AL Posted November 19, 2009 Report Share Posted November 19, 2009 A bad MAP could cause that cause the engine has no other way of monitoring air flow into the engine, Therefore not knowing how much fuel to dump Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted November 19, 2009 Report Share Posted November 19, 2009 yup.. been there done that after swapping motors in the 95 se... Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 19, 2009 Author Report Share Posted November 19, 2009 So, if I replace the MAP sensor things should get a lot better? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 Sounds like it! You may have to relearn your idle as well but I'm not sure.... Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 19, 2009 Author Report Share Posted November 19, 2009 How do I relearn an idle? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 http://www.w-body.com/forum/index.php?topic=31176.0 Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted November 19, 2009 Report Share Posted November 19, 2009 just driving it for 30 min it will relearn Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 This is after you replace the MAP, that is. Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 19, 2009 Author Report Share Posted November 19, 2009 44 AND 45? Lol, strange. Hmm, you're right that doesn't make sense. Maybe I miss read the blinking Check Engine Light. Maybe I am supposed to only have read 45, not 44 and 45. Quote Link to comment Share on other sites More sharing options...
AL Posted November 19, 2009 Report Share Posted November 19, 2009 Like I said, Its very possible for code 44 and code 45 to be there if the MAP sensor is bad, or if the MAP is getting wrong readings, IE. a vacuum leak from one of the lines from the MAP sensor Quote Link to comment Share on other sites More sharing options...
Night Fury Posted November 19, 2009 Report Share Posted November 19, 2009 44 AND 45? Lol, strange. Hmm, you're right that doesn't make sense. Maybe I miss read the blinking Check Engine Light. Maybe I am supposed to only have read 45, not 44 and 45. No, you're probably right. It makes sense now. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted November 19, 2009 Report Share Posted November 19, 2009 For more in-depth code info see this page: http://www.w-body.com/ecm-codes.html Quote Link to comment Share on other sites More sharing options...
Crazy K Posted November 19, 2009 Report Share Posted November 19, 2009 unplug the map sensor and see if it runs better or worse.... Quote Link to comment Share on other sites More sharing options...
tunerlover3 Posted November 19, 2009 Report Share Posted November 19, 2009 Having both a rich and lean code isnt uncommon. Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 23, 2009 Author Report Share Posted November 23, 2009 So, I unplugged my MAP sensor and the car ran better. So, I replaced the MAP sensor. Engine still doesn't catch. It will turnover, but not catch. But, this time around I noticed that the pistons were missing really bad, so I replaced the spark plug cables(I had replaced the spark plugs about 3 months ago). The engine no longer missed, but still didn't catch. So far I have seen improvements in the car performance with the MAP sensor replacement and the Spark Plug Cables, but still hasn't run. I decided to check the Throttle Sensor and Idle Valve. They were dirty, so I cleaned them and I cleaned the part that the Idle Valve went into. That Idle Valve was dirty. I see how that could have caused a problem. But, now that they are clean, the car still doesn't run. What do you guys think? Should I replace the Idle Valve? Oh, also there was a lot of gas in the Throttle Body. When I pulled the duct off there was a splash of gas on my garage floor. It was kinda oily, too. Please advise, Darryl Quote Link to comment Share on other sites More sharing options...
BXX Posted November 23, 2009 Report Share Posted November 23, 2009 Replace the PCM with a new one... Quote Link to comment Share on other sites More sharing options...
cutlasssupremeking Posted November 23, 2009 Author Report Share Posted November 23, 2009 What is a PCM/ECM? And where on my engine can I find it? Quote Link to comment Share on other sites More sharing options...
AL Posted November 23, 2009 Report Share Posted November 23, 2009 PCM is the Powertrain Control Module, ECM is the Engine control Module, Basically the engine computer, Its on the passenger side below the fuse box... You will probably have to remove your coolant reservoir Quote Link to comment Share on other sites More sharing options...
3.1cutlass Posted November 24, 2009 Report Share Posted November 24, 2009 PCM is the Powertrain Control Module, ECM is the Engine control Module, Basically the engine computer, Its on the passenger side below the fuse box... You will have to remove your coolant reservoir It is underneath the reservoir. Quote Link to comment Share on other sites More sharing options...
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