pacesetter longtube install
Remove Alternator, spark plugs, o2 sensors, steering shaft, dip stick, starter, water temp sensor in drivers side head and if you have old motor mounts you may want to take the main bolt out to lift the motor a bit
Have you also tried to put the 3 trouble ones in first, before the others? Could be worth a try too. And I'm sure you're already doing this, but needless to say you need to get all the bolts started before you tighten any.
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yeah.... im thinking to take the y pipe back off and try to move the header around
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Use ARP 3/8x1" or 5/16x1" bolts. Makes life much simpler.
1) Are you running the 'off-road' headers or do they have the AIR fittings and EGR pipe connector on the passenger side? If off-road headers you'll need to change the flags for those DTC codes to do not log/ report. Log stores them in the PCM (=OBD2 emissions fail, even if they ignore the missing components in the visual). Report turns on the MIL/SES/CEL.
2) Front O2s relocation needs to be addressed. The reading the PCM is looking for is based on a small delay (how long it takes the exhaust gasses to reach the O2s). Headers make that time need to be slightly longer since they're further from the combustion chamber/ exhaust port on the head to be accurate. There is also a swing voltage value that determines where the sensors think the divide between lean and rich is. If your tuner (or you) don't understand that this is necessary, find someone who does.
3) VE tables - slight improvement in volumetric efficiency from the intake and exhaust.
This is all mail order grade stuff and should be fairly inexpensive. There are several highly reputable tuners on this forum. Some tuners will credit the mail order cost toward a dyno tune later on if you add head work, cam, power adders, etc. I'd avoid having your PCM tuned "4less"
based on my experience with a mail order tune for a project 6-7 years ago.Good luck!











