Hi, I am new and I am having problems with a 92 ssei.It surges while under a heavy load going uphill. Then it will miss really bad. I tuned it up,,,,,plugs wires. Could it be the icm or coils.....gets hot around 225 sometimes.....I have a 180 degree thermo. I would love to hear anyones advice.....dont know where else to look...oh yea...2 codes.....tps code 21.......new ones x2..........code 58...someone said not to worry about that one.....any help will be greatly appreiciated.

Did you ever get it fixed 2.5 years ago? I don't know if the TPS would cause a miss, but I think it could under heavy load. In my experience, I had a weak fuel pump that would crap out under load and got worse the warmer it got.

The TPS won't cause any ignition issues, and this sounds very much like one.

Can you do this:
http://www.bonnevilleclub.com/forum/...e=article&k=33
And tell us what you get? At the same time, can you tell us the resistance of each plug wire by number?

I had a very, very similar issue with my 92 ssei. I ended up having a combination problem. I had a bad MAF sensor and a fuel pump that would not force enough fuel under load. My other symtoms included running great when it was cold and my pump would act worse the lower the fuel in the tank. i had to refuel at a little lower than half a tank. I had a mechanic test the MAF and we diagnosed and replaced that and then it was pretty easy to diagnose the fuel pump.

No I have never seemed to get it running right from 2 years ago....I ordered a new coupler for supercharger ..............we are going to change that.....put new coils on no help.........could it be the icm or the computer...........thanks for all the input........has a new maf on it about a year old.