Hi All,
I've got major drivability issues! So far, I've managed to log 350 miles, mostly around town for short periods. Last week, we went about 20 miles each way to a "cruise" and parked to watch. On the way home, got a CEL for 20 seconds that cleared, then the engine started missing and popping through the tailpipe all the way home. Several days later, my son and I went out for a 40 mile drive to duplicate the problem. After driving 30 uneventful miles, the same symptoms appeared. Unfortunately, we did not have T-Link on it, as it would not connect (later found the ignition key wasn't fully "on"). This time, it got progressively worse, finally stallling at an intersection without a restart. We had to dump the ECM memory and let the computer re-learn to get us home. Right before it stalled, I noticed the EGT was over 1500°! This was driving normally with NO horsing around. When we got home and managed to figure out T-Link, it showed a very lazy O2 sensor, a code 45 [rich], and the TPS at idle had somehow slipped to 0.24V. Those are the only things that stood out.
Today, we changed the O2 sensor, reset the TPS and verified full range of motion with no glitches, changed the fuel filter, verified the static pressure @ 44#. Tried another drive, but didn't make it 1/2 mile before it became totally undriveable! Babied it home in 1st gear, changed the chip (3 different ones), swapped ECM's, swapped MAF's, NO IMPROVEMENT!
Looking for ideas of where to go next, any help appreciated!
TIA!
I've got major drivability issues! So far, I've managed to log 350 miles, mostly around town for short periods. Last week, we went about 20 miles each way to a "cruise" and parked to watch. On the way home, got a CEL for 20 seconds that cleared, then the engine started missing and popping through the tailpipe all the way home. Several days later, my son and I went out for a 40 mile drive to duplicate the problem. After driving 30 uneventful miles, the same symptoms appeared. Unfortunately, we did not have T-Link on it, as it would not connect (later found the ignition key wasn't fully "on"). This time, it got progressively worse, finally stallling at an intersection without a restart. We had to dump the ECM memory and let the computer re-learn to get us home. Right before it stalled, I noticed the EGT was over 1500°! This was driving normally with NO horsing around. When we got home and managed to figure out T-Link, it showed a very lazy O2 sensor, a code 45 [rich], and the TPS at idle had somehow slipped to 0.24V. Those are the only things that stood out.
Today, we changed the O2 sensor, reset the TPS and verified full range of motion with no glitches, changed the fuel filter, verified the static pressure @ 44#. Tried another drive, but didn't make it 1/2 mile before it became totally undriveable! Babied it home in 1st gear, changed the chip (3 different ones), swapped ECM's, swapped MAF's, NO IMPROVEMENT!
Looking for ideas of where to go next, any help appreciated!
TIA!
