new & different hesitation!
Posted: Fri Jan 06, 2006 1:40 am
So, I'm having some super annoying hesitation/misfire on my '93 turbo leg. Here is run down...
With any load (uphill is worse) my car will studder (misfire). This is relatively mild, but limits power to basically nothing (can get no more than 85mph floored in 5th - this is WRONG!)
BUT - if I stay in it long enough it will clear up and pull hard at 5200rpm or so up to redline (like it was pulling timing - probably all of it). It used to feel weak over 5k, now the midrange is toast
When the engine is just started (cold) it will bog/kick/buck/mis/etc... to a huge degree with almost ANY throttle input.
I have replaced the plugs (proper NGK's) gapped at .039". New Diamond coil. checked plug wires (newer NGK's). Reset umpteen times. No codes.
I suspected the TPS (like it thinks it's closed all the time), but measured 2 others in Matt's "teh Ghetto Garage" but both had same readings as mine. Everywhere it is stated that the 2&3 pins (middle) should be 10kohm closed and 5kohm open - these all showed 10k regardless of position. The idle switch works (0/1Mohm). What is right here?!?!?!?
Anyhow, any thoughts (deep or not)? This is driving me nuts.
Thanks!
Chad
btw - '93 turbo leg, 76kmi, 3" catted CES TBE, pulleys, MBC (now at 9-10psi - was 12-13), A/W intercooler.
With any load (uphill is worse) my car will studder (misfire). This is relatively mild, but limits power to basically nothing (can get no more than 85mph floored in 5th - this is WRONG!)
BUT - if I stay in it long enough it will clear up and pull hard at 5200rpm or so up to redline (like it was pulling timing - probably all of it). It used to feel weak over 5k, now the midrange is toast

When the engine is just started (cold) it will bog/kick/buck/mis/etc... to a huge degree with almost ANY throttle input.
I have replaced the plugs (proper NGK's) gapped at .039". New Diamond coil. checked plug wires (newer NGK's). Reset umpteen times. No codes.
I suspected the TPS (like it thinks it's closed all the time), but measured 2 others in Matt's "teh Ghetto Garage" but both had same readings as mine. Everywhere it is stated that the 2&3 pins (middle) should be 10kohm closed and 5kohm open - these all showed 10k regardless of position. The idle switch works (0/1Mohm). What is right here?!?!?!?
Anyhow, any thoughts (deep or not)? This is driving me nuts.
Thanks!
Chad
btw - '93 turbo leg, 76kmi, 3" catted CES TBE, pulleys, MBC (now at 9-10psi - was 12-13), A/W intercooler.