1992 Jeep Cherokee 92 Cherokee

How do you know # 3 injector isn't getting any fuel? Use a noid lite, check for injector pulse.

[quote:d9e786db24="JDL"]How do you know # 3 injector isn't getting any fuel? Use a noid lite, check for injector pulse.[/quote:d9e786db24]

ok i had a miss and pulled the wires one by one. #3 is the only one that showed no change. Replaced all injectors and still no fire on #3. Checked plug and the plug was dry when pulled. Also whats a noid lite and injector pulse?

P.S. i am no mechanic so I do not know alot od the tools and testers.

Ok, did you have spark at the plug on number three cylinder? At the injector electrical connector, you need need voltage and ground. If you plug a noid lite into the injector electrical plug, engine cranking, if the lite flashes on and off, you have an injector pulse. Good job on the cylinder balance test, that is how you locate a dead cylinder.

[quote:41269aaf4b="JDL"]Ok, did you have spark at the plug on number three cylinder? At the injector electrical connector, you need need voltage and ground. If you plug a noid lite into the injector electrical plug, engine cranking, if the lite flashes on and off, you have an injector pulse. Good job on the cylinder balance test, that is how you locate a dead cylinder.[/quote:41269aaf4b]

Yes, I had spark. I had a friend go get a noid lite and tested the injector electrical plug and it flashed, any other ideas?

Did it flash all the time during cranking? Is there any compression on number 3 cylinder? I guess I'd have to look at it, I got nothing else.