When traveling at random speeds but more so.

Tiny
ANONYMOUS
  • 2003 FORD MUSTANG
  • 111,000 MILES

When traveling at random speeds but more so around 40mph the car jerks. I have replaced the sparks and wires and fuel filter. It does seem to run better when I put high octane gas in or use sea foam. It does not feel like its the transmission. Also the car is not throwing any codes and no light on the dash is on. I checked the check engine light is working. What should I do or replace next?


Thanks
Chad

P.S.
I dont have my debit card with me but I do plan on making a donation. Please forgive me!

Monday, February 11th, 2013 AT 7:09 AM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 48,694 POSTS

Check fuel pressure first and clean throttle plate on both sides with choke cleaner as well as iac hole if there is one.

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Monday, February 11th, 2013 AT 3:33 PM

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