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Question - replacing Jeep Fuel Injectors

Hello everyone -

1989, Jeep Cherokee - 6cyl / 4.0L - Fuel Injected 200,000 mi on jeep - has had rebuilt engines put in and etc during life of Jeep

Question - Are all Fuel Injectors basically the same ? I need to replace my # 3 injector ( it is cracked and leaking badly at the head / wires - the seals are otherwise brand new at the fuel rail and intake port ). My neighbor fixes cars for spare cash, and he has a bunch of used spare injectors laying around and gave me one that looks very similar to my standard equipment ones. We have a bit of a language barrier though (he's a native Spanish speaker), and I'm not certain if the injector he gave me will work with my Jeep ? Are all injectors the same, or are they calibrated to work with each individual make & model of car because of on board fuel control computers ?

If I could just use the one he gave me, that would be great and save me $$$ for a new aftermarket one. Does anybody have any info on this subject ? Thanks for the help - R. Jay Royer

Reply to
brokedownjeep
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No they are calibrated for the cylinder size for one.

There are some that will cross over, but not many.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >
Reply to
Mike Romain

But if you had no money, and if you couldn't communicate that well with the only mechanic you knew, and if the alternative was to spray gasoline all over the engine compartment, what would you recommend?

Don't these things have numbers on them, that you could compare? There is always the plug-it-in-and-see-what-happens school of thought too.

Earle

Reply to
Earle Horton

Thanks for the info Mike - thats what I thought. You learn something new everyday, and fuel injection is one of those subjects that I don't know that much about. So I guess I'm off to the parts store for the injector. Thanks again !

R. Jay Royer

--------------------------------- Mike Roma> No they are calibrated for the cylinder size for one.

Reply to
brokedownjeep

If it was too small, it could run the cylinder lean enough to burn something like a piston top.... Too rich and it could wash the cylinder walls killing the rings and contaminating the oil, let alone burn after the valve into the exhaust.

Mike

Earle Hort>

Reply to
Mike Romain

Lean will burn the valve, not rich.

Earle

Reply to
Earle Horton

No no, I was meaning 2' flames out the tail pipe idea...

Mike

Earle Hort>

Reply to
Mike Romain

"Atomic batteries to power, turbines to speed.. Let's move out."

Reply to
billy ray

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