2003 Chevy Blazer Mis firing

2003 CHEVROLET BLAZER
94,000 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
DTSHANES
  • MEMBER
  • 1 POST
I just had my 2003 Blazer tuned up and the service engine light is back on and it is still missing at different speeds, kinda chugging and then it stops, it has been doing this for about a month!! I am thinking its something not so complicated, fuel filter o2 sensor?? any words of wisdom?????
Jan 11, 2010 at 12:32 AM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Jan 11, 2010 at 1:30 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle