Any guesses? For about a week straight after putting in my C&L MAF Sensor, Throttle Body, Long tubes, Pro-Chamber, 2 Chamber Flows, Adj Fuel Press. Reg., and 24lb Injectors (yes the maf is cal'd to them), my car was throwing the check engine light at me all the time with really horrible drive ability. well, after awhile of doing the jumper trick and counting the flashes to pull codes, the car now goes into diagnostic mode almost everytime right after I start it up. The light flashes 4 times to signal "8 cylinders" and the revs pick up. If i start to drive the car it goes right away but I really want to get this pig to stop doing that. I check the wiring at the port and nothing is messed up there. All sensors are plugged in etc. I'm just wondering if anyone else had this problem and what they did to solve it. Any help is appreciated. I want to get the computer gremlins sorted out so I have a decent base line to go with once I drop my new 331 in. thanks.
Car goes into diagnostic mode on start up.
- Thread starter RyClef331
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OrangeMustangGt
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ok, remove the jumper....lol just joking, im guessing you possibly have a short between the wires where you HAD the jumper installed, do a resistance test and see if theres a dead short between the 2 terminals
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