Just installed a high pressure Walbro 255 and now the car wont start. Its like the injectors arent working. I can unplug the fuel pump thought and it will start until the fuel drains out. Are the stock injectors getting over powered or what. What would be a fix. ADj. fuel regulator or new injectors? any help?

 

Like Fred posted in the LT1 tech forum, your fuel pressure regulator is *supposed* to manage your fuel pressure. I'd test your pressure. If it's too high, then your regulator isn't doing its job, and depending on how high, it could lock up injectors.

Dave

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1997 LPE 383/n2o Camaro Z28 Convertible
12.39@112.2, 1.76 60' (na) 11.27@124.6, 1.76 60' (n2o)
LT1 Diagnostics, New to Nitrous? Northern California Racing Club