SPONSORED LINKS

1999 Volkswagen Jetta Stalling on Acceleration

Tiny
TAZMAN1982
  • MEMBER
  • 1999 VOLKSWAGEN JETTA
  • 4 CYL
  • FWD
  • MANUAL
  • 140,000 MILES
My 1999 VW Jetta, Stalls out in acceleration, mainly from 1-2K RPM. And will fall flat. And it is getting worse as it goes. When up to temp, It is not "as" bad.
Things I have fixed already: Plugs, Wires, Fuel Filter, Air Filter. I have done the Basic trouble shooting.
The code reader says Vacuum Leak but the Vacuum tester showed it was fine.
After doing some research it points to 3 things.
O2 sensor, Fuel Pressure regulator, or MAF sensor (replaced 1 year ago) They all range in the 50-100+$ range. I don't have the $$ to throw parts at it.
Do you know of any thing that would be the main problem? If I had to buy 1 part. What one would you do?
SPONSORED LINKS
Saturday, October 9th, 2010 AT 5:21 PM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
This is a tough one. The maf is my first guess, and I mean guess. The regulator could do the same as well as a vacuum leak. Have you tried cleaning the MAF?
Was this
answer
helpful?
Yes
No
Sunday, October 10th, 2010 AT 12:05 AM
Tiny
TAZMAN1982
  • MEMBER
  • 5 POSTS
I pulled the MAF off and blew it out. Not sure how else to clean it. It was spotless to begin with but I did try to clean it.
Is there a special way to clean it?
And according to the vacuum reader there is no leak. My dad and I are at such a loss with out blowing $$ and still having to take it to a repair shop.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, October 10th, 2010 AT 7:14 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
They make a special electronic cleaner that you can get at a parts store to properly clean the MAF. Have you noticed any difference since you blew it out?
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 8:56 AM
Tiny
TAZMAN1982
  • MEMBER
  • 5 POSTS
It was still laggy after. It seemed a bit better after until I shut the car off and it cooled down a little. Then it was just as bad. So I don't know if I can attribute the better running to the car warming up or blowing it out.
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 10:24 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
I would try cleaning it with the cleaner. I recommend this so we can save money if that is the problem and not have to replace it.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 11:20 AM
Tiny
TAZMAN1982
  • MEMBER
  • 5 POSTS
I used the MAF cleaner and the check engine light shut off but it is still bad. Could the throttle body be bad?
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 1:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
If the light now is off, have the maf checked. I think it is bad. If it didn't pertain to the sensor, cleaning it wouldn't have changed.
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 1:44 PM
Tiny
TAZMAN1982
  • MEMBER
  • 5 POSTS
It was the MAF. I talked with a VW dealer and he was very helpful. Gave me some trouble shooting ideas to verify the maf was problem. And it was. Problem now fixed.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Monday, October 11th, 2010 AT 10:15 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
That is what it sounded like. I'm glad it's fixed. Let us know if you have questions in the future.

Joe
Was this
answer
helpful?
Yes
No
Tuesday, October 12th, 2010 AT 7:37 AM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links