Missfire/bog (Page 2/4) Patrick MAY 28, 11:31 PM quote Originally posted by XxdjxX89: ...the tdc mark on the new pulley that was marked is not at true tdc of the motor Yes, that would certainly mess up the ignition timing! Hopefully this is the cause of your issue. XxdjxX89 MAY 29, 04:46 PM Well got the lash and timing all sorted out and car still bogs down XxdjxX89 MAY 29, 05:15 PM Just for a joke I swapped to a genuine gm icm With some good artic silver heat sinc paste no differenc If you can think of anything else I can try or might have missed let me know Patrick MAY 29, 06:14 PM Just a random thought... I know you've swapped out various sensors, but I wonder whether your ECM is actually getting a good solid signal from all of therm, due to a possible problem within the wiring hardness itself. The Check Engine Light can't be trusted in all situations, as it only appears to be triggered when a sensor suffers a total failure (or close to it). Do you have a scanner, or a way to run WinALDL? It would be so helpful for you to know if all the appropriate sensors are reacting the way they should when the throttle is being opened. XxdjxX89 MAY 29, 06:26 PM Yes I’ve been using my snap on mt2500 and the readings from the sensors look reasonable I have winaldl but my laptop broke so can’t use that right now XxdjxX89 MAY 29, 06:38 PM Map kpa is 34 map volts 1.32 Mat 38celsius Coolant 80 Celsius Integrator 135 Iac position 24 Closed loop works exhaust bounce from lean to rich Tps 0.55v Voltage for tps sweeps like it should Ends around 4.6 v Patrick MAY 29, 06:45 PM It's possible someone looking over this thread will see those figures and identify a possible issue. Your MAT reading is certainly higher than mine would currently be here. XxdjxX89 MAY 29, 06:53 PM I live in Las Vegas Nevada lol XxdjxX89 MAY 29, 08:23 PM https://youtu.be/hW4YmTItLu0 Gall757 MAY 29, 10:10 PM That motor is unhappy alright. Do you have a stock ignition coil? Some of the aftermarket high voltage coils cause problems.