Need some help and couldn't think of a better place to ask than Mud.
I rebuilt a '93 caprice engine (350 TBI) and have completed the installation finally (FJ40). I can't get the injectors to open and spray fuel - dry as a bone.
Here's what I have so far:
Code 12 with key on and ALDL pins A and B jumpered. No other codes.
Timing light confirms spark while cranking.
Fuel pressure at throttle body is 12 psi by gauge and is steady while cranking.
Throttle body is filling with fuel as confirmed by pulling the top off.
Test light confirms voltage to injector circuit (and others that need it) wih key on and while cranking.
Test light confirms voltage to "crank" wire while cranking.
Test light confirms voltage to both injectors with key on. (Didn't test it while cranking.)
Fuel pumps run for 2 seconds to pressurize when I turn the key on. (External low pressure pump to 1 quart size slosh tank to external high pressure pump.)
Should I test the injector pulse? A noid light would work to at least show whether there is a pulse, right? But I don't have one. Should I buy one just for this engine?
The manual I'm using says a light across the injector terminals will blink while cranking to indicate a pulse, but they say to use a BT8320 bulb or equivalent. Couldn't find this on the net. Not sure what bulb will substitute. Have read here that a normal test light won't work.
I put a rebuild kit in the throttle body awhile back. Never run this engine so I don't know what shape they were in.
Any suggestions are welcome. theo
I rebuilt a '93 caprice engine (350 TBI) and have completed the installation finally (FJ40). I can't get the injectors to open and spray fuel - dry as a bone.
Here's what I have so far:
Code 12 with key on and ALDL pins A and B jumpered. No other codes.
Timing light confirms spark while cranking.
Fuel pressure at throttle body is 12 psi by gauge and is steady while cranking.
Throttle body is filling with fuel as confirmed by pulling the top off.
Test light confirms voltage to injector circuit (and others that need it) wih key on and while cranking.
Test light confirms voltage to "crank" wire while cranking.
Test light confirms voltage to both injectors with key on. (Didn't test it while cranking.)
Fuel pumps run for 2 seconds to pressurize when I turn the key on. (External low pressure pump to 1 quart size slosh tank to external high pressure pump.)
Should I test the injector pulse? A noid light would work to at least show whether there is a pulse, right? But I don't have one. Should I buy one just for this engine?
The manual I'm using says a light across the injector terminals will blink while cranking to indicate a pulse, but they say to use a BT8320 bulb or equivalent. Couldn't find this on the net. Not sure what bulb will substitute. Have read here that a normal test light won't work.
I put a rebuild kit in the throttle body awhile back. Never run this engine so I don't know what shape they were in.
Any suggestions are welcome. theo