Got a 1997 yukon that starts good cold but backfires through the carb when warm ?

[nokuy97]

Hi, I am new here and just want to say hello to everyone and maybe get alittle help with this problem.

Thanks.

 

[99Yukon_Z71]

First off, no carburetor on our trucks, and you are too vague! Any check engine codes? Did you crisscross wires at a tune up?! More info please!

 

[TigerEyz3]

I'm with 99Yukon_Z71 on this...

• Carbs were a thing of the past (unless you've retro'd your engine) starting with the 1996 model year.
• Make sure all of your wires are run properly and aren't grounding out/arcing (night time would be the best time to check for this).
• More information is needed to help you troubleshoot.

If you have recently done any work on the ignition/motor/sensors (cap/rotor, plugs/wires, O2 sensors, etc), retrace your work and make sure everything is correct and that all connections are tight.