Well if it still stumbles, then its probably not the o2 sensor cause when you go full throttle, it stops taking readings. It could be the optispark but i would check the tps first. Seems like the optispark is used as a excuse way to much.

 

Yeah I talked to a mechanic and he said that if it was the opti then the car would not start at all so I'll try the tps sensor

 

This is not entirely true, you can have a bad opti and the car will still run, (like crap) but run, at times some will run fine cold then once warmed up, start missing, some only at WOT, there is a lot of different scenarios with a bad opti.

 

1994 & up you MUST use an OBD1 scanner.

 

I used an obd1 scanner and it didn't read any codes it said n stored codes what else should I do

 

was the SES light on when you scanned it?

 

Yeah I couldn't read any codes thow none not stored came up

 

So I replaced the tps sensor and it still acted up and it popped real loud when I gave it full throttle what does that meen????

 

Have you changed plugs? If so, the plug wires could be crossed. If not then most likely your opti rotor is coming loose.

 

yep. if its popping through the exhaust then either the wires are bad or crossed like he said. I would check the wires first before you do anything.

 

I have changed the plugs and wires bout 2 weeks ago to some ngk tr55 and some msd wires there not crossed I double checked them and they ok

 

IT was doing this before I changed the plugs and wires

 

Would I have to take off the water pump to relace the rotor???

 

1badzee's writeup on Opti replacement is a good one if you want a visual on what replacing it entails

http://www.lt1engine.com/tech/93-97-...emove-replace/