Author Topic: misfire symptoms  (Read 3229 times)

June 04, 2010, 03:41:22 pm

spdrace11

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misfire symptoms
« 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??
91 VW Jetta diesel coupe 1.6 NA 5spd, 91 Jetta 1.6 NA, 81 Caddy 1.6NA

Reply #1June 04, 2010, 08:18:16 pm

Rabbit on Roids

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Re: misfire symptoms
« Reply #1 on: June 04, 2010, 08:18:16 pm »
bad injector(s). when was the last time they were tested, serviced, or changed out?

Reply #2June 05, 2010, 09:57:23 am

spdrace11

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Re: misfire symptoms
« Reply #2 on: June 05, 2010, 09:57:23 am »
bad injector(s). when was the last time they were tested, serviced, or changed out?

Not sure.  How do you test them?
91 VW Jetta diesel coupe 1.6 NA 5spd, 91 Jetta 1.6 NA, 81 Caddy 1.6NA

Reply #3June 06, 2010, 10:39:30 am

arnold

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Re: misfire symptoms
« Reply #3 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

Reply #4June 06, 2010, 12:00:33 pm

gtidiesel1.6

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Re: misfire symptoms
« Reply #4 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...

Reply #5June 06, 2010, 12:34:38 pm

Wayland

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Re: misfire symptoms
« Reply #5 on: June 06, 2010, 12:34:38 pm »
Misfire when cold is a sign of poor compression, of one glow plug not working.
84 Grumman Olsen Kubvan
93 Dodge CTD Truck

Reply #6June 06, 2010, 07:31:50 pm

gtidiesel1.6

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Re: misfire symptoms
« Reply #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)