TPS? check the opti connector for condensation. check for any waterleaks. its possible you may have a leak like i did, it would only drip 2 or 3 times onto the opti from under the heater core intake hose, but only when the car was warm and the thermostat open

 

Well I finally replaced the opti today. Although the car responds a little better to the throttle there is still something wrong. I can push it to the floor in neutral or in gear and sometimes it will rev up and sometimes it wont. While driving it around the block I had the pedal to the floor and it would hardly move then all of a sudden it would take off. I also heard some popping/backfiring type noise from the engine bay. When I got it home I could smell something burning. The headers were extremely hot and I had only driven a mile or so. What would cause the headers to be so hot? Is this a symptom of something else that is wrong with my car? There was nothing wrong with my car prior to the cam/rocker/lifter/timing chain install. I felt that the install went well but there is one thing that I did that I wish I hadn't. I drove the crank hub back on with a socket and a hammer instead of pressing it back on. Could that be part of the problem?

Please note that I still have the stock torque converter and I need to get a new tune for the cam.

 

I also forgot to mention that I took the old opti apart and I did not see any signs of oxidation or moisture. So what's the next step I should take? Get larger injectors and get a tune or is there something more serious wrong with the car?

 

Guys, I still need help. Any suggestions?

 

I had the same problem after i degree'ed my cam. I installed the opti and tried to fire it up with out the water pump or intake on. It would idle but would try to die if i gave it any gas. I ended up checking the firing order and had 2 plug wires switched around, i don't know why that would cause it to die under acceleration, but it fixed the problem.

 

My car was doing the very same thing. I wish I would have seen this thread in time to let you know. Anyways.....I replaced the Opti and thought for sure it would be cured...didn't change a thing. I finally figured out the problem, my fuel pump was on its way out. You should try that man! Good luck!

 

What's the best way to check if the fuel pump is shot? I can hear it come on when I turn the ignition.

 

The way I found out, is my mechanic checked the fuel pressure, and it was way down. I don't remember exactly what it was carrying, sorry. A fairly knowledgeable mechanic should be able to do this for you.

 

Get a fuel pressure gauge. They cost about $40 from an autoparts store.