2002 Mazda 626 Misfire While Accelerating

Avatar
MS_NADIA
  • MEMBER
  • 2 POSTS
I have Mazda 626 V6, 2002 model with 70K miles approx. I had changed the plugs that I bought in September (about 65 K Miles) from AutoZone. Then in December my car start jerking and shocking while accelerating and check engine light came on. So took the car to the dealer. They told me that I need NGK plugs, wires and Fuel injection server. I was told the total damage would be 700$. Instead of that I decided it to do it myself.

For half the price, I bought the same NGK plugs and wires from a online Mazda Dealer and had the local shop put them on for 30$. I also bought the fuel system cleaner in my car (6$).

The check engine light is gone because the mechanic had reset the battery. The car does not jerk and give shock at least not that much. But it still is misfiring a bit. While accelerating the driver can feel it.

The question is should I get the fuel injection service? What is involved in fuel injection service?

Any other thoughts what could be wrong with car OR what could be the cause of misfire?
Jan 22, 2006 at 12:40 PM
Avatar
COSMO
  • ✓Experienced Mechanic
  • 347 POSTS
have the ignition coil checked out on your engine. What codes were in the computer?

Cosmo...mazda tech
Jan 22, 2006 at 1:52 PM
Avatar
MS_NADIA
  • MEMBER
  • 2 POSTS
I dont remember the actual codes, but the I was told that the cyln 1 misfire.
Jan 23, 2006 at 4:55 AM

Suggested Repair

Have the ignition coil checked and retrieve the stored trouble codes. A cylinder 1 misfire was reported, so focus diagnosis there before assuming a fuel injection service is needed.

Conversation Summary

A 2002 Mazda 626 V6 began jerking and misfiring under acceleration with a check engine light after aftermarket plugs were installed. NGK plugs and wires were later installed and a fuel system cleaner was used, reducing the symptoms and clearing the light after a battery reset, but a slight misfire remained. The owner recalled being told of a cylinder 1 misfire but not the exact codes. The expert recommended checking the ignition coil and identifying the stored codes.

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.

Frequently Asked Problems for This Vehicle

Advertisement