what would be the symptom of a bad or bad-adjusted TPS.

What does M.A.P. means? what would be the symptoms?

thanks

puma

 

My TPS acted-up once. It made my car have a big hesitation at 20% throttle. It was only at 20%, i was able to see it on my Apex S-AFC.

M.A.P. = Manifold Absolute Pressure (i think)

 

hmm ok well my problem is the same hesitaion but only at WOT

 

I had a WOT hesitation, i found out that i was running too rich! Easy to do, i guess, seeing its so stressfull not to run too lean (pop!).

 

how come you ran too rich?

i have a dp and a cb, i don't see why this could make me run rich but my exhaust is really black

 

I'm not exactly sure, i just ordered a fuel pressure gauge to check out if i'm running too much fuel pressure, but i dont think thats it. The only other reason would be that i did too good of a job making sure i did'nt run lean, for example:
-G-force computer upgrade
-Apex S-AFC
-Upgraded nipondenso fuel pump
-Fresh injectors from RC engineering
-Fresh Fuel Filter
-94 octane Gas
-Stock ignition (i thinking of getting a twin power now)
-only run 12-13psi boost

All of the above i did because i didnt want to run too lean. I think i might have gone over kill and gone too rich. I currently have my S-AFC set to about -11% from 4000 to 7000rpm for both low and high throttle. My car runs much better leaned out 11%. I've been watching my J&S for knock but havent seen any. Its kinda makes me nervous leaning out my car, but it does sound and run alot better. Soon i'll be getting an Apex PFC, and hopefully then i can get it tuned better.