How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Gary Your Own Question
Gary, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1123
Experience:  Senior Technician
Type Your Chevy Question Here...
Gary is online now
A new question is answered every 9 seconds

1998 Tahoe 5.7, misses and backfires out exhaust from 1/2 to

Customer Question

1998 Tahoe 5.7, misses and backfires out exhaust from 1/2 to WOT, No codes.
New parts on it are, distributor, plugs, wires, coil, ignition module, crank sensor, coolant temp sensor, O2 sensors, 55psi fuel koeo, koer.
TPS, goes it's full range In a smooth pattern
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.
Hi there,You have already replaced just about everything.I would have the injectors flowtested.How about fuel filter?Are you keen to add a test fuel pressure gauge to the windshield so you can observe while you drive?Gary
Expert:  Gary replied 1 year ago.
Hi again,Have you tried as I have suggested above?I hope my advice has been of assistance to you. Please rate my service at your nearest convenience. Kind regards Gary
Customer: replied 1 year ago.
Yea I have drove it with fuel psi gauge and does not fall on WOT pulls. Fuel filter new.I'm going to put a set of known good fuel injector assembly in it and see how it does.
Expert:  Gary replied 1 year ago.
Sounds like you are getting there now.Best of luck with the injectors.Regards Gary