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 GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
10949255
Type Your Chevy Question Here...
GM Tech (Cam) is online now
A new question is answered every 9 seconds

Having misfires and horrible running getting zero's on short

Customer Question

Having misfires and horrible running getting zero's on short term fuel trim and long term fuel trim. No check engine lights
Submitted: 2 months ago.
Category: Chevy
Expert:  kalamykid replied 2 months ago.

zeros on the trim is actualy good. Have you checked for any codes being set?

Customer: replied 2 months ago.
No codes , I've never seen a car with zero short and long term in 20 years l, scan tool shows 800 misfires in less than 1 minute
Customer: replied 2 months ago.
Car idles fine , under throttle it craps out ... Will run fine at certain moments
Expert:  kalamykid replied 2 months ago.

What cylinders are miss firing? Are you saying the trim does not ever change?

Customer: replied 2 months ago.
Well I seemed to have fixed the trim issue, but all cylinders are Mis firing
Expert:  kalamykid replied 2 months ago.

How old is the cap and rotor button?

Customer: replied 2 months ago.
Brand new
Expert:  kalamykid replied 2 months ago.

What brand did you use?

Customer: replied 2 months ago.
Ac Delco , also new Cpk, tps, egr, wires, plugs, all 02 sensors
Expert:  kalamykid replied 2 months ago.

Can you pull the cap off and check the rotor button and see how far up you can pull it? Also check the metal tab on the tip and see if it looks like it has been hitting some thing?

Customer: replied 2 months ago.
New distributor, spider gears, fuel pressure regulator, and pump/filter also, this guy just threw parts at it!! I will check that in the am, you thinking ignition related?
Customer: replied 2 months ago.
Lol sorry spider injectors
Expert:  kalamykid replied 2 months ago.

If the trim is staying right around 0, then it will not be due to air flow or a vacuum leak. That only leaves timing or compression.

Related Chevy Questions