Injector Help - ZR-1 Net Registry Forums

vettn71 · 05-24-2009

Just installed new injecto0rs and coild today. Everything went like butter - no leaks, no issues going together. The car now has a miss from startup. Idles rough, it says I have full power, but I don't, can hear the flywheel hitting - not hard, but sounds like a click more than a bang. All vacuum hoses are in place. Took it out to see if it would work through it - no chance. Didn't get any better. Didn't seem to get any worse, either. No codes are set, BTW.

Okay fuel injector replacement gurus, grasshopper needs to sit at your knee.

Jim

GregCrowe · 05-24-2009

What kind of coils did you install?

jonszr1 · 05-24-2009

also did you do a pressure test after the install just to ck everything?????

bobbyhi · 05-24-2009

I would say that one or more of the injectors aren't seated correctly.

vettn71 · 05-24-2009

The coild are GM "545"s From JeffVette. The car ran great when it was cold, but had a hard miss after heat soaking. I thought it would be a coil breaking down with temoerature or an injector failing, so I replaced them both. Did not do a pressure test. I've had no issues with that previously and ran the car two days ago - cold, ran great; after heat soaking, like poop. New fuel pumps and filter, anyways.

Can you explain exactly what you mean by an injector not being seated correctly. I checked them over both in the fuel rail and after the install. They looked sqaure in the holes.

Jim

secondchance · 05-24-2009

What kind of injectors?

-=Jeff=- · 05-24-2009

Quote:

Originally Posted by secondchance

What kind of injectors?

Yeah I agree.. you might have a leaker..

vettn71 · 05-24-2009

The injectors are FICs from Jon

secondchance · 05-24-2009

Based on my personal experience and past posts, it seems both bad coil and injectors going bad, at times seem ok until they become heat soaked.

Do you have access to a scanner?
I am not one of the gurus here but when scanned there is a value, integrator and block learn (I think should be between 128-131?) for both banks. If less, typical suspect is one or more injector failure.

http://www.zr1netregistry.com/forum/...light=injector

secondchance · 05-24-2009

Hey, Jeffvette

How did you isolate which injector specifically was the leaker?

05-24-2009	#1
vettn71 Join Date: Oct 2008 Location: Colleyville, TX Posts: 272	Injector Help Just installed new injecto0rs and coild today. Everything went like butter - no leaks, no issues going together. The car now has a miss from startup. Idles rough, it says I have full power, but I don't, can hear the flywheel hitting - not hard, but sounds like a click more than a bang. All vacuum hoses are in place. Took it out to see if it would work through it - no chance. Didn't get any better. Didn't seem to get any worse, either. No codes are set, BTW. Okay fuel injector replacement gurus, grasshopper needs to sit at your knee. Jim

05-24-2009	#2
GregCrowe Join Date: Sep 2004 Location: Oklahoma Posts: 111	Re: Injector Help What kind of coils did you install?

05-24-2009	#3
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,406	Re: Injector Help also did you do a pressure test after the install just to ck everything?????

05-24-2009	#4
bobbyhi Join Date: Jul 2005 Location: Mendota Heights, MN. 55120 Posts: 983	Re: Injector Help I would say that one or more of the injectors aren't seated correctly.

05-24-2009	#5
vettn71 Join Date: Oct 2008 Location: Colleyville, TX Posts: 272	Re: Injector Help The coild are GM "545"s From JeffVette. The car ran great when it was cold, but had a hard miss after heat soaking. I thought it would be a coil breaking down with temoerature or an injector failing, so I replaced them both. Did not do a pressure test. I've had no issues with that previously and ran the car two days ago - cold, ran great; after heat soaking, like poop. New fuel pumps and filter, anyways. Can you explain exactly what you mean by an injector not being seated correctly. I checked them over both in the fuel rail and after the install. They looked sqaure in the holes. Jim

05-24-2009	#6
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,730	Re: Injector Help What kind of injectors?

05-24-2009	#8
vettn71 Join Date: Oct 2008 Location: Colleyville, TX Posts: 272	Re: Injector Help The injectors are FICs from Jon

05-24-2009	#9
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,730	Re: Injector Help Based on my personal experience and past posts, it seems both bad coil and injectors going bad, at times seem ok until they become heat soaked. Do you have access to a scanner? I am not one of the gurus here but when scanned there is a value, integrator and block learn (I think should be between 128-131?) for both banks. If less, typical suspect is one or more injector failure. http://www.zr1netregistry.com/forum/...light=injector

05-24-2009	#10
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,730	Re: Injector Help Hey, Jeffvette How did you isolate which injector specifically was the leaker?