Question about 1985 Volkswagen Jetta

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1985 jetta with deisel will not start with the key?

I can pop start jetta after pulling it for a short distance and it will run just fine and idle forever with no problems. If I try to start it with the key it will crank forever as long as the battery holds up but will not start; even if it was just running. I have taken the fuel line off the filter to see if it was getting fuel while trying to start with key and it did not. Does anyone have any suggestions on what I can do to fix me problem?

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  • Mike Butler
    Mike Butler May 11, 2010

    What happens when you spray "quick start" in the intake, does it fire up & stay running, or just quit shortly after?

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Check glow plugs

Posted on Jan 04, 2009

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Nov 20, 2009 | 2003 Volkswagen Jetta TDI

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I have a 1985 voltzwagon jetta ,trying to get running for my daugter(first car).Seems to have an intermident problem.Runs fine at times-Then runs totally rich (Black Smoke),missing some times-seems to be...


first; there are two) oil pressure switches on the car. you can replace the one till your blue in the face, and it will still come on. we ground that one; so it won't scare people to death.(1 in head.1 in block).<P>
Change fuel filter, and add a can of SEAFOAM to FULL tank of PREMIUM gas. Help it to idle 3-5 minutes.(this is the firsr year of the body change and engine change1.8, but they are good cars.)<p> After idle; drive somewhere where you can open it up for 10 miles or so. that should help alot.In he future, respond at rlmvbc@hotmail.com<p>
i've was a service writer,parts pro and salesman for VW for 10 years. I've also owned 4 bugs,6 rabbits, 1 scirroco, and 5 jettas. the older ones are better.

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1 Answer

I have a 1985 volwagen jetta GL, when I turn the key, sometimes I get nothing, sometimes it turns over and starts. Is this the ignition switch? And if so, where is it located? Thanks all.


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Aug 27, 2009 | 1985 Volkswagen Jetta

1 Answer

Sometimes cant idle


i will recomend you to clean the carburetor with carburetor cleaner, just buy some at auto parts remove the hose on top on carburetor and keep the rpm arrownd 2500 and keep ading the cleaner to the inside of carburetor, if you add too much it might backfire just keep you face away from the carburetor good luck and let me know

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