Why is my boost so high?
#26
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Dyne was from 09. Nothing has been done to it since then. The kid I bought it off wasn't who built it. He said his buddy did. All receipts are from gm dealerships who installed all the upgrades so at least I know it was done right? Haha
#27
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I want to add that going through receipts i found that the cat was already replaced under warranty. Is it possible it could be clogged again? Or another restriction in the exhaust somewhere else?
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Also if you take the pcm out of its plastic holder it should have a gm performance division sticker on the back, at least every stage 3 pcm ive seen has this sticker. But you probably have a clogged cat. Happened to me on an aftermarket downpipe that had a cheap thunderbolt cat and the actuall honeycomb interals broke apart and clogged the pipe. Nothing to do with the tune but with a defective part.
#32
If you have an adjustable rev limit and ability to switch to high octane mode, you have the gmrs3 pcm.
With the ignition on (car not running), press your foot on the accelerator pedal. If the rpm needle moves/climbs, you have an adjustable rev limiter.
If this is the case, you prob have GMRS3.
GMS2 uses the stock PCM. GMRS3 uses a separate/new PCM.
With the ignition on (car not running), press your foot on the accelerator pedal. If the rpm needle moves/climbs, you have an adjustable rev limiter.
GMS2 uses the stock PCM. GMRS3 uses a separate/new PCM.
#40
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Well I'll remove down pipe this week. Have a lot of time since I already lost my license owning this car haha. If its not the cat any other ideas on what I should check?
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