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Volkswagen Jetta, Golf, GTI: 1985-1992 (A2) new here


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Last Post: Jun 24, 2014 10:08 AM Last Post By: FKH161
jetta love

Posts: 4
Registered: 06/07/14
new here
Posted: Jun 7, 2014 2:35 PM
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Hi, I just stumbled across this site and am amazed at how much info is here. thanks for that.
I do how ever have some trouble with my 92 jetta digi2, wich I could use some help on.
back ground info: the car was running good for about a year since I bought her. then about a month ago it started acting a bit weird when I first would startit and get going...it wouldn't start on the first time cranking, but then it would start the 2nd time but for the first min or two of running it was like it was I was towing a tank behind the car..and then bam it would run great....as of last week I pulled in the driveway and it stalled out and has yet to start again. I have spark from the coil and at the #1 plug...it will somewhat fire with a shot of quick start..the external pump runs when I cycle the ignition. should I just buy the pre pump and change it? from what I have read on here today it is all I can come up with. any help would be appreciated greatly...thanks for reading..i look forward to any help or guidanceat all.
FKH161

Posts: 7,622
Registered: 12/29/05
Re: new here
Posted: Jun 9, 2014 8:13 PM   in response to: jetta love in response to: jetta love
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Yes, could be a bad transfer pump (in the gas tank)... remove the access cover and place a screwdriver against the plastic lid where the fuel lines are. Have someone crank the engine and place your ear against the screwdriver handle. If you do not hear / feel a buzzing sound, remove the power connector and check for voltage at the red/yel wire while someone is cranking... if you have power & no buzzing, replace the pump.
jetta love

Posts: 4
Registered: 06/07/14
Re: new here
Posted: Jun 10, 2014 9:13 PM   in response to: FKH161 in response to: FKH161
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Attachment jbomb.jpg (31.2 KB)
Thanks for the help, I haven't had time(or ambition) to go at the car since I posted, but tomorrow I will go and try what you said. I hope that all it is..I've over thought the heck out of it since it happened..lol
jetta love

Posts: 4
Registered: 06/07/14
Re: new here
Posted: Jun 16, 2014 6:19 AM   in response to: FKH161 in response to: FKH161
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hi again, I tried what you suggested and alos diconected the out line from the pre pump..it works, then I unplugged it and disconnect the line feeding the fuel rail and cycled the key and the main pump worked too..but im still not getting fuel into the motor..could it be the ecu? any suggestion would e helpful..thanks again
FKH161

Posts: 7,622
Registered: 12/29/05
Re: new here
Posted: Jun 19, 2014 1:43 PM   in response to: jetta love in response to: jetta love
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Sorry about late reply!

The fuel pressure port is at the right end of the fuel rail. Use a 7mm & 10mm wrench to remove the small bolt and then attach a pressure gauge to the end.

You can bypass the fuel pump relay to run the pump for as long as you are checking pressure. Bridge slots 30 & 87 of the relay panel.

What is pressure?

Aside from that, make sure that the timing belt is ok and that all the TDC makes line-up, including the ignition rotor in the distributor.

At the right hand side of the cylinder head (by the coolant flange)... there are a couple ECM ground wires, make sure that they are not broken, as well as the brown wire at the battery negative clamp.

Key ON, disconnect the O2 sensor and measure the reference voltage of the black wire... should be .45 to .5 volts If close to 0, then either the ECM is not powered up or the reference is shorted to the shunt wire that is around it.

If the voltage is more than .5 (.7 or more), then the ECM does not have a good ground somewhere.
jetta love

Posts: 4
Registered: 06/07/14
Re: new here
Posted: Jun 24, 2014 7:07 AM   in response to: FKH161 in response to: FKH161
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hello again, thanks for the help, I tried to go through the steps you posted, but I was getting frustrated and ended up bringing her in. it turns out it was just a broken wire, but it was one I couldn't find..lol
but while the tech had it idleing the heater core blew out..the 2nd time in less than a year. thank goodness its summer.,.time to save until I can afford another one put in.
FKH161

Posts: 7,622
Registered: 12/29/05
Re: new here
Posted: Jun 24, 2014 10:08 AM   in response to: jetta love in response to: jetta love
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Good to hear she's running again, sorry about the core.

If it doesn't have a/c, the core is easy to change.

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