no start TPI

10-19-2010, 07:31 PM
91 Firebird 305 TPI quit running, 40psi fuel pressure, good spark, noid shows injectors firing. Changed cap, rotor, ignition module, fuel filter. Tries to fire, but won't catch, I'm out of ideas. Could it be plugged catalytic converter?

10-19-2010, 08:50 PM
Just pulled the catalytic converter off and still no run. Acts as if it's not getting fuel. If I spray carb and choke cleaner in the throttle body it'll run till that's gone. It's got fuel pressure and the injectors are pulsing, what could it be?

10-22-2010, 02:07 PM
Finally have myself convinced it's a bad prom. Got the bugger started and tried to set the timing, timing light is erratic, strobes 8-12 times then off for 8-12 cycles. Since the input is the same for the injectors and the timing I've concluded that the prom is malfunctioning. Anyone else encountered this?

10-25-2010, 09:04 AM
I would have the ignition control module tested first. :2cents:

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