bad backfire
09-23-2009, 10:08 PM
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bad backfire new forged motor, bosch green top 42 injectors, comp cams 224/224, long tubes, dual breathers one on each valve cover. The car wont idle and backfires, the backfiring is probably from the low idle. reprogrammed back to stock but same thing. reprogrammed for injectors and no cookie.
I change all idle related tables to 1200, car wont idle, like it has major exhaust leak. the motor is new from the machine shop. I checked for vacuum leaks and found none. I run two driver side valve covers with no fresh air ports or pcv. I have a breather in each oil fill hole. The intake is completly capped off. Last thing i want to try is changing the crank position sensor.
I change all idle related tables to 1200, car wont idle, like it has major exhaust leak. the motor is new from the machine shop. I checked for vacuum leaks and found none. I run two driver side valve covers with no fresh air ports or pcv. I have a breather in each oil fill hole. The intake is completly capped off. Last thing i want to try is changing the crank position sensor.
09-24-2009, 01:12 AM
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Make sure the coils are on right. Maybe the packs are reversed. Check the grounds, esp the back of the drivers head. Just a couple of things i've seen cause nightmares.
09-24-2009, 11:15 PM
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Just throwing things out there that could cause your issue. There are probably a few more, but I can't think of any right now.
