Shortcut: getting injectors to fire w/o pulling UIM
#1
Shortcut: getting injectors to fire w/o pulling UIM
Hey guys- just got an '89 GTUs that's sat since around 03. Old man I picked it up from already tried to get it running but failed. Has a new fuel pump, car's getting fuel and spark but won't start. If I pour fuel into the engine it starts and runs well until it's burned off.
Just to confirm
-S5 NA
-Fuel IS getting to injectors- cranked w/ fuel feed house removed from rats nest & saw fuel be pumped out during starting
-spark confirmed by bouncing tach during cranking
-compression passes the audible test of cranking w/ plugs out, and it also runs w/ fuel poured in.
Remember, this car has sat for nearly 10 years, so I'm really confident the injectors have degraded fuel remnants within them causing them to stick.
I'm looking for a way to get them to fire w/o pulling the intake. Basically, just get this car running as quickly as possible, so it can move under its own power until I have the time to go through it properly & have the injectors sent out & refurbed/radiator flushed/new coolant houses/etc. etc. etc.
What comes to mind is pulsing the injectors w/ an injector pulser at the plugs to the ECU.
Thanks!
Just to confirm
-S5 NA
-Fuel IS getting to injectors- cranked w/ fuel feed house removed from rats nest & saw fuel be pumped out during starting
-spark confirmed by bouncing tach during cranking
-compression passes the audible test of cranking w/ plugs out, and it also runs w/ fuel poured in.
Remember, this car has sat for nearly 10 years, so I'm really confident the injectors have degraded fuel remnants within them causing them to stick.
I'm looking for a way to get them to fire w/o pulling the intake. Basically, just get this car running as quickly as possible, so it can move under its own power until I have the time to go through it properly & have the injectors sent out & refurbed/radiator flushed/new coolant houses/etc. etc. etc.
What comes to mind is pulsing the injectors w/ an injector pulser at the plugs to the ECU.
Thanks!
#3
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[QUOTE=Landon303;11056000
What comes to mind is pulsing the injectors w/ an injector pulser at the plugs to the ECU.
Thanks![/QUOTE]
that will work. spinning the CAS will also work
What comes to mind is pulsing the injectors w/ an injector pulser at the plugs to the ECU.
Thanks![/QUOTE]
that will work. spinning the CAS will also work
#7
Rotary Freak
OR one of your primary injectors has bad wiring. Like mabe someone installed a new injector clip at some time and made a bad solder connection on one of the wires?
IF you check each of the fuel injector wires AT the ECU plug with key ON you should have batt voltage........and if you do then I'm wrong about bad injector wiring being the problem.
IF you check each of the fuel injector wires AT the ECU plug with key ON you should have batt voltage........and if you do then I'm wrong about bad injector wiring being the problem.
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3W - (Front primary)
3X - (Front secondary)
3Y - (Rear primary)
3Z - (Rear secondary)
See F1-8 -> Free 1989 FSM: Fuel and Emissions Control Systems (Non-Turbo)
3X - (Front secondary)
3Y - (Rear primary)
3Z - (Rear secondary)
See F1-8 -> Free 1989 FSM: Fuel and Emissions Control Systems (Non-Turbo)
#9
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OR one of your primary injectors has bad wiring. Like mabe someone installed a new injector clip at some time and made a bad solder connection on one of the wires?
IF you check each of the fuel injector wires AT the ECU plug with key ON you should have batt voltage........and if you do then I'm wrong about bad injector wiring being the problem.
IF you check each of the fuel injector wires AT the ECU plug with key ON you should have batt voltage........and if you do then I'm wrong about bad injector wiring being the problem.
I went through this whole ordeal when my car was leaning out under boost, using a spare CAS, testing voltage at the ecu, checking for continuity to the injector clips (which I has already replaced). Turns out the secondaries were just sticking. As it turned out, the reason WHY was a large amount of sediment had been sucked into the fuel system so that might be something to check on.
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CaptainKRM
2nd Generation Specific (1986-1992)
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