I was wondering if you turned up the voltage to the TPS over .56 if that would affect anything? Would it make it richer? OR just throw the ECM off thinking the throttle is depressed more than it actually is?? I have a crane cams AFPR set at 46psi....and its great, but was just wondering if adjusting the TPS up more would compliment it...or make things worse. Had some free time at work and started thinking...lol

 

It'll make you slower. My experiences.

 

I don't know if it will necessarily make you slower with only setting it at 56...but you won't really see any benefit either.

 

don't worry..according to your sig. that year '91 tps is non adjustable.

 

I played around with that one day at work. Moved it from .46 to about .66, I saw no difference. Throttle response felt the same, BLMs stayed the same...Just my experience for what its worth...

 

IT "IS" adjustable too....all you have to do is barely loosen one screw and it changes drastically. I tried changing it to .60 and it stumbled from a stop....kinda like a carb with too big of a metering rod or something....changed it back to .54....and she purrs like a kitten. Just my experience.....

 

By doing that you are kinda 'confusing' the ecm. In an ideal situation, the ecm looks at the TPS, and knows how much air is going in the engine, and how much fuel and timing to give. So, you 'artificially' raise the TPS setting to something else, and the ecm is now thinking that there is more air going in (the throttle plate is open wider) and so we need more fuel and different timing, right?

Doesnt mean it wont work for you, might make things better, might not. Its all about finding the right setting, not the highest one.

 

Didn't even look at the sig. You're right. You don't need to adjust the TPS on 91-92. The ECM zero's it itself upon every start.

 

It's not going to make any difference. The ECM uses a delta in TPS position to calculate additional fuel delivery. That is, for any given abrupt change throttle position, the ECM is going to look at the difference between where the throttle was and where the throttle is. So the starting voltage is inconsequential.