Question about 1990 Volkswagen Jetta

1 Answer

Bought my '90 Jetta few months back and ever since i got it, its had a small hesitation problem and isuues with cold starting. After doing a tune up and replacing the spark plugs, dist. cap, rotor, and E.F.I coolant temp sensor it seemed to be running ok - although it still had intermittent hesitation and was still a little hard starting in the cold. Came home one cold night and went to start it in the morning and it would turn over but not start. There was fuel going to the engine but would not start. I checked for spark and there was none, so i replaced the ignition module on top of the computer. After that i did get it started, however, it would no stay idling, and would only continue to run if the throttle was at least 1/2-3/4 engaged. I'm wondering... possibly a coil issue...a problem with the ECU itself?? Any suggestions would be appreciated!! Thank you!

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,033 Answers

I have worked on VW's in the past and one thing that I have found to be a problem for many is the plug wires and the coil wire need to be coated with Di-Electric grease. This prevents moisture from building up and when the moisture does get in there, the moisture causes misfire or no fire at all. Make sure it's dry inside the boots before you apply this.. Good Luck.

Posted on Mar 12, 2011

  • 1 more comment 
  • travisnkalis Mar 12, 2011

    Wires and coil are greased... anything else?

  • Chris Busby
    Chris Busby Mar 12, 2011

    Right off, this is all. Only other things that I think of are the Crank shaft position sensor, Fuel pressure regulator, Throttle body position sensor. Sorry could not be of more help.

  • christi70143
    christi70143 Feb 08, 2013

    check your idle air intake, it may need cleaning. I had a similar issue with my '90 golf

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

!982 244dl 30k miles fuel pump?


change your fuel pump relay.

Apr 16, 2012 | 1982 Volvo 240 Series

1 Answer

Is there a plug in for a diesel jetta


I don't believe any VW sent to the US in the past 15+ years has come with a plug-in heater. The only exception is if the car was from Canada, or if one was installed afterwards.

If the engine turns too slowly to start, try cleaning the terminals of the battery, if still nothing- replace the battery.

If the engine turns over but just won't fire up cycle the glow plugs a few times before trying to start. Turn the key to on, wait for the glow plug light to go out after a few seconds then turn the key off. Repeat 2 or 3 times before you try to start.

Also make sure you use a fuel additive for the cold months. Look for something with anti-gel on the label.

Jan 08, 2010 | 2005 Volkswagen Jetta

1 Answer

Car hard to start on humid days


Just tuned up a jetta, put di-electric grease under the plug wire boots and especially the coil wire. The moisture causes mis-fire mainly at the coil. His VW had the same problem. Small pack of grease will be enough. buy 2 packs at adavance auto for $1.09 each.

Dec 31, 2009 | 1996 Volkswagen Jetta

1 Answer

Hsitation


if it only does it when you start it cold its not the converter when a converter is going bad or restriced it acts worse the long the car runs i would replace the coolant temp senor for the fuelinjection system it won't set a code but it can read the wrong temp when you start up cold it could be telling the computer that the motor is warmer then it really is this will make the motor run lean causing the hesitation . You said you did a tune up i hope you put the factory plugs back in putting pefomance plugs in a computer controled car and not reprogaming the ECU can also cause a hestation.

May 29, 2009 | 1996 Jeep Grand Cherokee

2 Answers

My jetta sputters sometimes when im driving


I recently had a similar problem. I got my car scanned and needed a new catalytic converter. If its already starting to spit and sputter, you probably have 3-6 months to get this done. Mine plugged up one day, and just flat out would not drive anymore. This cost of this repair was about (i recommend changing the spark plugs and wires also) $675....pretty costly. could get a lot more expensive the longer u let it go. Does your jetta run cold, in cold temp? (between 25-40 degrees) if so the thermostat probably took out the converter.

Feb 07, 2009 | 1999 Volkswagen Jetta

1 Answer

When 87 suzuki stops it dies, hesitation when starting


I've never seen a samurai without a PCV valve hooked up. You sure its just missing it cuase that is what releases the pressure build up in the engine. If not working/installed then you're gonna get piston blow by, oil burning, and a rough running engine.

Jan 09, 2009 | 1988 Suzuki Samurai

3 Answers

2000 Jetta Heater Not working


2000 jetta warms up when idling, but gets cold as soon as I start driving.

Dec 17, 2008 | 2000 Volkswagen Jetta TDI

1 Answer

Jetta 2003 TDI


My mechanic in our town did a quick computer check. Car computer indicated a low level of antifreeze, he topped it up, cleared all messages off the car computer and said to watch the the heat guage for any further irregularities. I'll keep an eye on it, love the car, great mileage fun to drive.

Nov 05, 2008 | 2002 Volkswagen Jetta TDI

Not finding what you are looking for?

Open Questions:

0 Answers

Hi there, I have a 1990 Volkswagen Jetta Flair 2. I've had the car for about a year now and overall it's been an excellent car for it's age. However, there's always something that needs to be fixed and lately I've had throttle response problems. I do not have any mechanical backround, so I will describe it as best as I can. For one, it seems apparent this is an issue when the engine is cold (or not sitting in the sun all day). I will put the foot down, and it won't respond until it gets to about 3000rpm (right around when I'm thinking about changing gears), and then it rocket ships forward. Before it finally responds, there's a lot of shaking going on in the engine bay. It doesn't sound pleasant either. I took it in for an oil change, and they put fuel injector in it and it seemed to be a temporary solution. Whatever the case, there's a poor connection between me putting the throttle down and the car responding to the action. I do rev it up before I get going, but it's kind of futile. So as a result, I have a tendency to stall in first gear at low speeds as the gas doesn't react when I want it to, and the clutch is usually released by that point. After about 5-10 minutes of constant driving, it will accelerate smoothly. If you can point me in the right direction, whether it's "fuel" related, or it's some sort of heat sensor (I have no idea what I'm talking about), let me know if you've had similar experiences. All my repairs have cost me less than a 100 each time, I want to keep it that way.

Sep 05, 2013 | 1990 Volkswagen Jetta

See all 1990 Volkswagen Jetta Questions

1990 Volkswagen Jetta Logo

175 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

yadayada
yadayada

Level 3 Expert

76051 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8265 Answers

Are you a Volkswagen Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...