Only one fuel injector spraying and it’s spraying too much gas

DontPressureMe · Jun 22, 2024

i have a 1988 chevy k2500
was braking at a red light and truck turned off as there wasn’t any gas coming from the injectors

i blew the injector fuse and when i replaced it only one injector works and it’s spraying too much fuel and it sounds extremely loud

i swapped the connectors on the injectors and the same one started. new fuel pump, new injectors

i’ve read it could be the ECM or the ICM, how would i go about testing either of those things ?

DontPressureMe · Jun 22, 2024

inj A+B is the fuse i blew

someotherguy · Jun 22, 2024

Check the injector wires where they go past the air cleaner spacer ring. On the earlier years like your truck that ring is steel (around '94 changed to plastic) and the wires would sometimes get chafed and short out. If so, you can get repair pigtails for these.

Richard

DontPressureMe · Jun 22, 2024

someotherguy said:
Check the injector wires where they go past the air cleaner spacer ring. On the earlier years like your truck that ring is steel (around '94 changed to plastic) and the wires would sometimes get chafed and short out. If so, you can get repair pigtails for these.

Richard

checked em and seems they’ve been replaced awhile ago
they’ve been splice together but aside from that there isn’t any chafing

DontPressureMe · Jun 22, 2024

DontPressureMe said:
checked em and seems they’ve been replaced awhile ago
they’ve been splice together but aside from that there isn’t any chafing

for more info
i replaced the pigtails already by the tbi
but someone replaced them more down the line

evilunclegrimace · Jun 22, 2024

Put a noid light on the injector plug and see if it is being triggered

DontPressureMe · Jun 22, 2024

evilunclegrimace said:
Put a noid light on the injector plug and see if it is being triggered

it’s being triggered, put the noid light on both

Orpedcrow · Jun 22, 2024

The coil in the injector could have shorted, that would pop a fuse. I’d measure the resistance on both injectors and see what you come up with.

DontPressureMe · Jun 23, 2024

Orpedcrow said:
The coil in the injector could have shorted, that would pop a fuse. I’d measure the resistance on both injectors and see what you come up with.

how would i do that? just put the needles in the prongs of the injectors and see what they read ?

DontPressureMe · Jun 23, 2024

DontPressureMe said:
how would i do that? just put the needles in the prongs of the injectors and see what they read ?

i did just this and the injector that isn’t spraying doesn’t have resistance and the one that is spraying doesn’t

gonna replace the injectors and see what happens

Only one fuel injector spraying and it’s spraying too much gas

DontPressureMe

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someotherguy

Even more awesome in person

DontPressureMe

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evilunclegrimace

Does not always play well with others

DontPressureMe

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Orpedcrow

I don’t know what I’m doing

DontPressureMe

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