Jeep tj frens!
I need mechanic help!!
My mechanical mind is at its limit.
My vehicle is a 2002 jeep wrangler sport automatic.
I recently rebuilt my 4.0 I6 and did the full stroker build during this process I worked with Russ Pottentger @bishipbuhel racing. He supplied me with racetec pistons, 4.2 crank, a higher lift cam, a fully ported head, matched scat rods, bullet timing chain, Matched injectors, and a larger throttle body from BBK.
At the time of the rebuild I replaced every single bolt, sensor piece and part. All new and of the quality Russ told me to. This including rebuilding the trans, a new exhaust from the headers all the way to the tailpipe(including cats!) The o2 sensors are all new Bosch. The coil pack was replaced with a msd ignition rail and all throttle body parts where replaced (IAC,MAP,TPS) the only thing original in my engine bay is the stock computer, the original wiring, evap system, and the original engine block.
Now to the problem.
Since I have put this jeep back on the road I keep running into a missfire on cylinder 6 and evap code saying very small leak. I have done a leak down of the cylinders starting at 80 lbs and had a maximum loss of 7lbs. Cranking Compressions where all up in the 160-170psi range and have swapped coils, plugs, injectors, o2 sensors for newer ones, checked fuel rail press @47lbs, did a bleed down on the rail to find zero loss checked injector patterns and all checked out proper. My plug in 6 is sometimes wet and other times it looks like it has had a good burn(not rich, nor lean)
I forgot to mention I went and borrowed a Daimler Chrysler computer to set the sync sig at the cam, and replaced the cranck sensor with 3 different brand to no avail.
Tonight I pulled off the valve cover and checked my lift and every single intake and exhaust valve had uniform lift. I used a camera to look into the cylinders to find no culprits, oil is clean, doesn't burn a drop and I'm at a loss for words confiding my circumstances.
Any help would be greatly appreciated. I'm starting to think that maby there is a bad computer or a messed up wire going to the coil pack. But I would even know how to test this. Thanks in advance
I need mechanic help!!
My mechanical mind is at its limit.
My vehicle is a 2002 jeep wrangler sport automatic.
I recently rebuilt my 4.0 I6 and did the full stroker build during this process I worked with Russ Pottentger @bishipbuhel racing. He supplied me with racetec pistons, 4.2 crank, a higher lift cam, a fully ported head, matched scat rods, bullet timing chain, Matched injectors, and a larger throttle body from BBK.
At the time of the rebuild I replaced every single bolt, sensor piece and part. All new and of the quality Russ told me to. This including rebuilding the trans, a new exhaust from the headers all the way to the tailpipe(including cats!) The o2 sensors are all new Bosch. The coil pack was replaced with a msd ignition rail and all throttle body parts where replaced (IAC,MAP,TPS) the only thing original in my engine bay is the stock computer, the original wiring, evap system, and the original engine block.
Now to the problem.
Since I have put this jeep back on the road I keep running into a missfire on cylinder 6 and evap code saying very small leak. I have done a leak down of the cylinders starting at 80 lbs and had a maximum loss of 7lbs. Cranking Compressions where all up in the 160-170psi range and have swapped coils, plugs, injectors, o2 sensors for newer ones, checked fuel rail press @47lbs, did a bleed down on the rail to find zero loss checked injector patterns and all checked out proper. My plug in 6 is sometimes wet and other times it looks like it has had a good burn(not rich, nor lean)
I forgot to mention I went and borrowed a Daimler Chrysler computer to set the sync sig at the cam, and replaced the cranck sensor with 3 different brand to no avail.
Tonight I pulled off the valve cover and checked my lift and every single intake and exhaust valve had uniform lift. I used a camera to look into the cylinders to find no culprits, oil is clean, doesn't burn a drop and I'm at a loss for words confiding my circumstances.
Any help would be greatly appreciated. I'm starting to think that maby there is a bad computer or a messed up wire going to the coil pack. But I would even know how to test this. Thanks in advance
