gp1991 Posted March 17, 2012 Report Posted March 17, 2012 (edited) I posted the other day about my turn signal, but now i have bigger fish to fry here. Yesterday i was leaving the Kohls after getting some summer clothes and when i started my car it sort of rumbled around and ran rough but in a minute it went back to normal. When i was driving home i saw the ses light on so when i got back i read the code and got 13. After that i went outside to move the car to the other side of the drive and it worked normal. Then when i went back to leave the house, it wouldnt start. This morning i tried starting it and it will run but when cranking i have to hold down the gas pedal a couple inches and it smells way more like gas than it usually does. any thoughts? I should also mention its a 3.1 Edited March 17, 2012 by gp1991 Quote
94 olds vert Posted March 17, 2012 Report Posted March 17, 2012 A code 13 is an oxygen sensor. I have had that code come up before. Pretty easy to replace one of those. It's right behind the EGR. I'd check your fuel pressure. If that's good, check your ICM, if it's not one of those you might have a bad injector. Quote
gp1991 Posted March 17, 2012 Author Report Posted March 17, 2012 also i can hold it steady at 1000 rpm with the gas barley down but the second i let off it just stumbles down. im going to go check the fuel pressure now. Quote
gp1991 Posted March 17, 2012 Author Report Posted March 17, 2012 could we be dealing with the IAC possibly being bad here? Quote
94 olds vert Posted March 17, 2012 Report Posted March 17, 2012 (edited) Stalling, rough idle, rough acceleration or constantly revved up too high. A code 35 is a IAC. Edited March 17, 2012 by 94 olds vert Quote
ScoobyDoo82 Posted March 17, 2012 Report Posted March 17, 2012 (edited) I can't say without personally checking out the car myself... but my Cavalier has at least one bad injector, and say when I drive it to operating temp and park it for like 15 minutes, and start it back up, it runs very rough and will stall out, but after a few mins of driving its fine again. The injectors in these cars are batch fire (meaning they all pulse at the same time regardless of the engine stroke), so if you have one bad injector with very low resistance it can stop the others from firing properly. Also your code for the O2 sensor doesn't mean its bad, it just means its out of limits and a bad injector can certainly cause that. Edited March 17, 2012 by ScoobyDoo82 Quote
gp1991 Posted March 17, 2012 Author Report Posted March 17, 2012 It was the IAC, i replaced it about 6 months ago with a duralast one from autozone because i was trying to figure out what another problem was, and it wasnt the IAC then. I put the original one back in and took out the duralast and it fired right up and ran. Last time i buy that shitty duralast crap. Its neither durable or does it seem to last. Quote
ScoobyDoo82 Posted March 17, 2012 Report Posted March 17, 2012 Glad you figured it out. And I wouldn't shun Duralast though, my Cavalier is made of probably 75% of Duralast parts and they're all holding up Quote
RobertISaar Posted March 17, 2012 Report Posted March 17, 2012 GM's alpha-n idle program is why you got your code 13, just in case you were wondering. it assumes the IAC is in the position it commands it to be and will actually base fueling off of that instead of calculated airflow via speed-density. IDK why GM ever implimented it, but it also somewhat disables closed loop fueling as well, which is why it can set the DTC 13 (O2 sensor being lazy) code if you're significantly richer or leaner than anticipated. Quote
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