Intermittant no crank, no fuel pump prime, no injector signal?
Hi. RE 1989 IROC Z Camaro 305 TPI AT.
Intermittent NO Crank with SES and VATS lights functioning in THE normal fashion. When I remotely energize the starter it cranks fine, (NO START) sometimes NO Fuel Pump Prime (0 PSI @ Rail) , sometimes pump runs w/ 35 PSI @ Rail), YET does not run unless I spray Carb Spray in PCV hose to manifold. In other words, what would SHUT DOWN a GOOD cranking system, SOMETIMES / SOMETIMES NOT prevent fuel pump receiving current, and apparently prevent injectors from firing? My Actron CP-9190 scanner reads "Communication Error" . I recently bought this car as a "Fixer" and have no history. THANK YOU! |
A Camaro is not a Corvette. I would suspect VATS
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Originally Posted by Mikeceli
(Post 1599562964)
Hi. RE 1989 IROC Z Camaro 305 TPI AT.
Intermittent NO Crank with SES and VATS lights functioning in THE normal fashion. When I remotely energize the starter it cranks fine, (NO START) sometimes NO Fuel Pump Prime (0 PSI @ Rail) , sometimes pump runs w/ 35 PSI @ Rail), YET does not run unless I spray Carb Spray in PCV hose to manifold. In other words, what would SHUT DOWN a GOOD cranking system, SOMETIMES / SOMETIMES NOT prevent fuel pump receiving current, and apparently prevent injectors from firing? My Actron CP-9190 scanner reads "Communication Error" . I recently bought this car as a "Fixer" and have no history. THANK YOU! |
I will get a set of NOID lights, been meaning to for years! I am set up to start the GM FSM troubleshoot tree. It is a PITA and was hoping someone FAMILIAR w/ 80's GM VATS, ESCM (ECM), Ign. Control Modules, etc. might have some shortcut tips. FWIW I also posted in tgo.org (F Body forum) with no responses, so far. Thanks
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no distributor reference pulses
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Originally Posted by Mikeceli
(Post 1599571216)
I will get a set of NOID lights, been meaning to for years! I am set up to start the GM FSM troubleshoot tree. It is a PITA and was hoping someone FAMILIAR w/ 80's GM VATS, ESCM (ECM), Ign. Control Modules, etc. might have some shortcut tips. FWIW I also posted in tgo.org (F Body forum) with no responses, so far. Thanks
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