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charity

06-30-2005 10:41 PM

502 backfires

checked compression 150 all 8 fuel pressure 34 psi timming ok engine is a 1995 mpi plugs cap and rotor new back fires worst at 2000 rpm help?

FOUNTAINATLAST

06-30-2005 10:48 PM

Re: 502 backfires

Was this a previous problem or start after plugs, cap, & wires??? Firing order correct???

charity

06-30-2005 11:03 PM

Re: 502 backfires

firing order is correct engine has set for 8 months ran fine before

offthefront

06-30-2005 11:31 PM

Re: 502 backfires

Run a can of merc fuel treatment and also a quart of MMO in the crankcase .....

charity

06-30-2005 11:39 PM

Re: 502 backfires

whats mmo? i PULLed injecters to have cleaned and flow tesed will install in the morning

KNOT-RIGHT

07-01-2005 08:15 AM

Re: 502 backfires

Is the backfire coming from intake or exhaust?

charity

07-01-2005 08:19 AM

Re: 502 backfires

exhuast does drive oil moniter not hooked up cause fuel cut ?

thespy

07-01-2005 08:43 AM

Re: 502 backfires

mmo=marvel mistory oil, red and black quart can.

KNOT-RIGHT

07-01-2005 08:47 AM

Re: 502 backfires

Is backfire coming from both exhaust banks?

charity

07-01-2005 09:36 AM

Re: 502 backfires

both banks

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