Clean the plugs, and make sure #3, especially, is getting spark. I'd verify them all for spark. If spark is there, then swap #3 injector with #5 and see if the problem follows to #5.
Acts like it wants to run but doesn't.
- Thread starter NO4NSHIT
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- 2003 yukon help newbie
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What @Fless said. Basics first. Had you already checked the spark and if all had spark, what color? Did you swap the coils already and forgot to tell us?
Couple of ongoing threads on this, could we stick to using one or the other?
So many times a new member thinks they will get quicker answers by posting multiple places. Hell, we see it stacked up together when we go to New Posts and see the list and the same problem has three threads going. GRRRRRRRRRR!
No I haven't I've been working on it tho I will definitely try that next. But I read somewhere it's not good to check the old fashioned way as in put plug in boot and lay on steel somewhere in engine bay..??
I apologize for that but I needed someone to respond and I wasn't getting any so I posted again. I might be new to this forum but I been a member of gmt400 for good while. So the nbs and LS engines are new to me
You can get very inexpensive spark check tool at any parts store. I have done the test you describe hundreds of times with no problems. Newer rig may need checked out for that though.
Need your rig info so I can see if the application is different between gas and flex.
Flex injectors are different, and I believe that the electrical connectors are different, too. Might be wrong about the connectors.
