!997 Yukon possible injector problem with a different question.

[Yukon_Jackass]

Sorry in advance if this has been asked but anyway i worded this i could not find it. I have a 97 Yukon 5.7 and i had the Auto-Zone dude check out my CEL with his crystal ball. and it is misfiring on Cylinder #8 and Cat is not preforming at total efficiency, and it hesitates and jerks when then throttle is down only. I feel that it is probably the spider injectors and I am really new to the vortec engines and I searched the forum and could not find this question i have. Is it possible with the spider injection to just change out one injector or do i need to buy the whole 300 dollar setup? as i am short on cash for a bit. and it seems like it is getting worse. Had a backfire last night that scared the hell out of me and the boy. and help to that question would be a great help.

 

[SunlitComet]

yes it is possible. the individual replacement for the original design run about $50 each at local stores. sure there is nothing wrong with the ignition for that cylinder?

 

[Yukon_Jackass]

I hadnt looked into that... hadnt even crossed my mind. is there a test to run on that? or how does one know that? I was just going the route of trying to replace the injectors but this could be feasible as well. it has 213,*** on it. so it really could be anything at this point.

---------- Post added at 11:07 PM ---------- Previous post was at 11:04 PM ----------

the two worst things to use Google for.... when you are sick, and when your rig is not running right. Google is the DEVIL!

 

[SunlitComet]

you can do an ohms test on the spark wire or inspect the dizzy cap internally and the most simplest maybe is remove the plug and inspect it.

 

[Yukon_Jackass]

I checked the plugs and wire... all good there. But a question I guess I have instead of jumping right at the fuel injectors would it be possible for the 02 sensors to cause the shuttering and jerking?

 

[SunlitComet]

They can change your mixture quite a bit and if the vehicle is in horrible tune then maybe. Have a shop do a fuel balance test if you like to see how the injectors are doing.