VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => IDI Engine => Topic started by: spdrace11 on June 04, 2010, 03:41:22 pm

Title: misfire symptoms
Post by: spdrace11 on June 04, 2010, 03:41:22 pm

Well i know that a misfire is impossible in my 91 Jetta Diesel however the symptoms are the same.  When ever i first start it, or if the speed is constant, not accelerating, the car seems to misfire.  Any suggestions??

Title: Re: misfire symptoms
Post by: Rabbit on Roids on June 04, 2010, 08:18:16 pm

bad injector(s). when was the last time they were tested, serviced, or changed out?

Title: Re: misfire symptoms
Post by: spdrace11 on June 05, 2010, 09:57:23 am

Quote from: Rabbit on Roids on June 04, 2010, 08:18:16 pm

bad injector(s). when was the last time they were tested, serviced, or changed out?

Not sure.  How do you test them?

Title: Re: misfire symptoms
Post by: arnold on June 06, 2010, 10:39:30 am

Big chance it wil be a bad injector,my engine misfired at cold starts and sounded like a subaru,one injector had a very low opening pressure.
I miss the subaru sound though  :(

You need someone with a pop tester

Title: Re: misfire symptoms
Post by: gtidiesel1.6 on June 06, 2010, 12:00:33 pm

I had my injectors tested recently and the guy who did them said they were good. I have a slight missfire when cold that i cant seem to figure out whats causing it. It feels almost like the car is surging...

Title: Re: misfire symptoms
Post by: Wayland on June 06, 2010, 12:34:38 pm

Misfire when cold is a sign of poor compression, of one glow plug not working.

Title: Re: misfire symptoms
Post by: gtidiesel1.6 on June 06, 2010, 07:31:50 pm

god damn it, and i just changed the headgasket a few weeks ago and had the head checked(was good)