94Loyale Posted December 16, 2007 Share Posted December 16, 2007 Just a suggestion, but if its only when the car is warmed up, could it just be an oxygen sensor? Not sure if it will work on your car, but on my 94 Loyale, I had an exhaust leak at the head on the passenger side flange. The car would run great cold, but would act up when it got warm. I suspected the leak was throwing off the o2 sensor, so I unplugged the sensor and drove it like that. If the computer has no input at all from the o2, it should run on a set parameter. The car ran well with the o2 disconnected, so I knew it was the exhaust leak that was messing things up. Fixed the leak and all is well. The way I described the computer as acting may not be exactly the same, thats the way it is on BMW Motronic. Maybe you could try the same though, just unplug the o2 and try driving it. I might be off the wall here, but I work differently then most people. Link to comment Share on other sites More sharing options...
Gloyale Posted December 16, 2007 Share Posted December 16, 2007 Tried reading codes today. 5 flashes...5 flashes...5 flashes... (O2 sensor light) O.K. that is the model designator. Flashed if there are no codes present. It would be a 6,or 7 or 8 if the car was Cali. spec. Auto or Manual(whichever it's not) Would be 1-4 if the car was SPFI. Point is that no codes indicated. I'm at a bit of a loss. Have you tested the function of the TPS? at least the idle switch portion? And other than a rough idle, how does this affect the driveability? Flat spot in the power band? Link to comment Share on other sites More sharing options...
RMVR53 Posted December 16, 2007 Author Share Posted December 16, 2007 O.K. that is the model designator. Flashed if there are no codes present. It would be a 6,or 7 or 8 if the car was Cali. spec. Auto or Manual(whichever it's not) Would be 1-4 if the car was SPFI. Point is that no codes indicated. I'm at a bit of a loss. Have you tested the function of the TPS? at least the idle switch portion? And other than a rough idle, how does this affect the driveability? Flat spot in the power band? How 'bout no power band. When warm, if you go off idle, it spits, backfires, major stumble to the point of no power/rev-up. Shut the car off and its fine for about a minute then it starts all over. Haven't tested the TPS switch yet. I'll do that today but my symptoms don't point just towards a faulty TPS me thinks... Bill Link to comment Share on other sites More sharing options...
RMVR53 Posted December 16, 2007 Author Share Posted December 16, 2007 TPS cxhecks fine. Unplugged the O2 sensor and it still does the same thing so that rules that out next? Bill Link to comment Share on other sites More sharing options...
Gloyale Posted December 16, 2007 Share Posted December 16, 2007 Sounding more and more like a coil issue. It's common for them to cause these types of symptoms. Although I am not sure about the misfire, but all the other stumbling when hot issues sound like coil. Link to comment Share on other sites More sharing options...
RMVR53 Posted December 16, 2007 Author Share Posted December 16, 2007 Sounding more and more like a coil issue. It's common for them to cause these types of symptoms. Although I am not sure about the misfire, but all the other stumbling when hot issues sound like coil. ok...I'll go get one then.... thanks Bill Link to comment Share on other sites More sharing options...
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