Hope ssomeone can help, having issues with a 91 Trans Am GTA, while driving the ses light comes on, engine runs rough but if I keep revs up it will clear itself the ses goes out and runs normally, if I let revs drop the engine will stall. Engine will restart immediately with no ses and runs normally again, can go for 500-1000 miles before reoccurring. On the rare occasions ses stays on shows code 53. Once the ses light goes off no codes are stored.

 

 

New battery and alternator fitted when problem first occurred, I have had system tested recently, all operating perfectly. At the moment it is just a 20-30 second inconvenience every few hundred miles, but would like to fix problem.

 

 

Me too, that's why I changed battery and alternator, next thought was ECM, unfortunately they're not that easy to get over here.

 

 

 

Thanks, never thought to look at rockauto, usually the first place I go for parts, not as expensive as I thought, even with core charge.

 

My question would be this ; If an intermittent connection existed between the battery and alternator isn't it possible that as the connection went open the ECM would see a voltage spike as the intermittent connection opened ?

 

 

 

Now you got me thinking, could it be as simple as a bad connection seeing as it is so intermittent and fault only lasts for a few seconds.