Thread: The Newest Problem with no DTC...

Originally Posted by BillBoost37

Shouldn't be going into lockup at 40mph? I believe and would have to check for this particular car etc, TCC lockup typically is programmed for around 35mph in third gear.

I'd be more apt to believe this is tune up related. Please tell us brand of wires, brand and model of plugs, if you've checked the coil pack towers for corrosion and or cleaned the TB/airfilter recently.

If you ever need to test if TCC has locked up. Keep your right foot steady on the throttle and gently press the brake with your left. You are aiming to turn on the brake light (pcm sees this) which unlocks the tcc and you should see a 200-500 jump in rpm. Letting off the brakes should allow it to relock.

In drive the car should immediately unlock TCC at 40 mph under any acceleration, no? If just barely maintaining speed it shouldn't be "hunting" for lockup. This is when the PWM is working its hardest.

I challenge you again Bill! -------- I'll probably lose again but that's OK.

Watch, it's probably a vacuum leak, TPS or something stupid like that...DERP