1996 Pontiac Grand Am missing on cyl 1 and 3

1996 PONTIAC GRAND AM
Avatar
KHARTDUCK
  • MEMBER
  • 1 POST
Engine Performance problem
1996 Pontiac Grand Am 4 cyl Front Wheel Drive Automatic
----------------------------------------------------------------
The engine is missing on cyl 1 and 3. I have spark at the plugs and injectors are spraying fuel. I have changed the plugs, wires/boots and coil and ignition module. The only code I get is P0300. Dont know what to do next.
Jun 10, 2008 at 9:54 AM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
P0300 Random Misfire could be a vacuum leak or contaminated fuel.

Misfires 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.
Jun 10, 2008 at 10:12 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