car runs rough when it heats up
04-17-2010, 09:38 PM
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car runs rough when it heats up My car has been running rough the past week so I changed the plugs wires and opti. Same thinng I changed the coil and all of the o2s and same thing. As soon as it gets hot the car starts running rough and missfires. I don't have any codes but hooked up the scanner and here is what it read. The spark keeps changing by two degrees and I think its running lean what do you guys think. 
Last edited by Drew24; 04-18-2010 at 08:57 AM.
04-18-2010, 08:43 AM
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Launching!
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Does anyone know where i could take it that they can put it on the scanner to get it diagnosed. Im thinking about taking it to the dealer to have them look at it. Im just really concerned why its just pouring fuel into the car.
04-19-2010, 12:34 PM
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I just replaced the coil and its the same thing but i checked the fuel pressure. Ran through the checks again and it holds steady at 40psi when just in the on position when i turned it off the pressure started to drop but was not rapid at all very gradual. Plugged the vacuum on the regulator and it held about 43.3 ish psi. Drove the car around when cold and then heated up and never fell past 41 psi. I was was told to unplug the maf and check the fuel pressure and that was the same which idk why that would make a difference in pressure if that is plugged in or not. But what leaning more too is shouldnt the car run worse when the maf is unplugged? Because the car still runs the same if i hook the scanner up what should the reading of the maf be at?
Thanks for all the help
Thanks for all the help
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04-20-2010, 09:22 AM
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So I took my car to the dealer and told me its not missing and there are no dtcs. The said that there was a recall on the air pump. So they changed it and this is the read out at idle after I got it back 
Its still running ruff but not as bad is there anything I can check here is the read out of the o2s at idle
Should i still try to replace the icm and what else do you think i should check im going to try to clean the maf again and do a fuel treatment and seafoam it. Im thinking it might be a clogged cat but not sure do you thing that could cause this?
Its still running ruff but not as bad is there anything I can check here is the read out of the o2s at idle
Should i still try to replace the icm and what else do you think i should check im going to try to clean the maf again and do a fuel treatment and seafoam it. Im thinking it might be a clogged cat but not sure do you thing that could cause this?
