The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue

76C10Stepside · 08-18-2014, 11:05 PM

Jacking the front up and disconnecting the fuel line stopped the drip. Probably have a damaged injector. Have to admit that I did not put trans fluid on the injector o-rings when I rebuilt the TBI--I THOUGHT about doing it, but didn't see the line in the instructions that said to do it, and was not sure if the oil might damaged them. Only after I was done did I see that. After installing the new IAC, I snugged up all the bolts in the TBI "to be safe". That may have been the last straw for the injector(s). I only saw the left injector actually leak/drip, but there was gas all over the tops of the parts, like something was spraying.

If I have only one bad/leaky injector, do I need to replace BOTH of them at the same time? Looks like they are $73 a pop or more.

08-18-2014, 11:05 PM	#41
76C10Stepside Registered User Join Date: Feb 2012 Location: Olympia, WA Posts: 300	Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue Jacking the front up and disconnecting the fuel line stopped the drip. Probably have a damaged injector. Have to admit that I did not put trans fluid on the injector o-rings when I rebuilt the TBI--I THOUGHT about doing it, but didn't see the line in the instructions that said to do it, and was not sure if the oil might damaged them. Only after I was done did I see that. After installing the new IAC, I snugged up all the bolts in the TBI "to be safe". That may have been the last straw for the injector(s). I only saw the left injector actually leak/drip, but there was gas all over the tops of the parts, like something was spraying. If I have only one bad/leaky injector, do I need to replace BOTH of them at the same time? Looks like they are $73 a pop or more.