Question about 2004 Volkswagen Beetle

1 Answer

2004 bug engine surging

I have a 2004 diesel bug. After it warms up the rpms surge from 2000 to 2500 or 2800 rpms and the car sorta bucks along until you step on the pedal to go faster.I had a mechanic look at it and he said that nothing shows up on the diagnostic scan.please oh please help. Thanks.

Posted by on

  • Mike Cockburn
    Mike Cockburn Jan 08, 2014

    throttle pos. sensor.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 121 Answers

The issue may be the EGR valve. Sometimes the valve can test out OK with a vacuum pump but can still cause issues with surging. Is this happening between a quarter and half throttle? The reason you wont notice it before it warms up is because the ECM doesnt activate the EGR valve when it is cold. One temporary test you could do is unplug the EGR valve and try and drive the car once it is warmed up. If this stops the surging this is the issue. One other issue could be your Fuel pressure regulator. Your fuel pressure could be low from this and it will cause your fuel injectors not to be able to vaporizefuel as much causing the bucking feeling. Keep me posted. If you found this solution helpful please rate it when you get a chance.

Thanks - Tech101

Posted on Jun 25, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Buick Lesaber, Lower then 1800rpm most time runs fine, Once in while surges high rpm's like driving fast 1900 & above rpm bucks /2100 smooth's out.


Need to take to a shop with a GM tech 2 or higher scan tool. These tools can actually display various sensor readings and voltages in real time and can be used while driving the car to recreate the issue. These are super expensive scan tools so most shops don't have them. Call around or bite the bullet and have a dealer do it. The money you spend on a correct diagnosis will be saved by not throwing random parts at it based on guess work.

Nov 01, 2016 | 1995 Buick LeSabre

2 Answers

This engine has a surge; AT 35-45mph,it's a bit more prounounced, not as bad, but still there at 60mph. As the tach goes up some, then down, so does the motor, up then back down, etc.Any ideas?


About 73,200 results (0.82 seconds) Search Results

    Surging While Driving Between 40 and 50 MPH : Chrysler ...

    repairpal.com > Problems > Chrysler > Town & Country
    Around 35 mph (common street speeds) the engine will sometimes surge with noticeable tach fluctuations. ... I have a surge when coasting around 40-45 mph.

    Enginge surges RPMS drop while driving [Archive] - Chevy ...

    forums.trailvoy.com > ... > OEM Issues

    Mar 17, 2012 - 19 posts - ‎7 authors
    [Archive] Enginge surges RPMS drop while driving OEM Issues. ... I so hope somebody has a clue as to what is causing my '02 Envoy's (182k) engine to ... I'll be driving and when I get up to around 35 - 45 MPH sometimes my ...

    Hesitation and bucking on acceleration - F150online Forums

    www.f150online.com/...engines/476391-hesitation-bucking-acceleration....

Feb 09, 2016 | Cars & Trucks

1 Answer

While driving 2004 Hyundai Elantra the rpms momentarily surge and then it sputters, check engine light flashes but does not stay on. This happens when its a cold or warm engine. What could be the cause of...


Same as ALL vehicle issues

Put a scanner on it & check for codes
& look at data,don't use it like that, until
you know the issue

Have a shop drive it for 25 miles & record data
& wait for it to act up,then diagnose the problem

Mar 06, 2014 | 2004 Hyundai Elantra

1 Answer

92 camry, 2.2 , Surges on take off and wants to die, also at 4000 RPMs,replaced TPS no change, put car in neutral turn car off and it runs for a good for a minute and starts surging again


petrol engine running on when switched off is excessive carbon deposits in head glowing and igniting the incoming mixture,,if in diesel the fuel shut off solinoid is not working

Jun 21, 2010 | 1992 Toyota Camry V6

1 Answer

1989 honda prelude. engine surges. from normal to 2100 rpms


There is a warm up valve on the throttle body(should have 2 small coolant hoses). remove the valve and have someone start the car while you block the port to the valve on the intake. If that clears up the problem you can cut a piece of cardboard to mount in between the valve and intake.should straighten it out.

Oct 01, 2009 | 1989 Honda Prelude

1 Answer

Engine surges at rpm over 1500


Look for a vacuum leak (lines and intake), Is the engine light on, were any codes present? A faulty EGR or IAC could cause the problem too. Check the throttle cable for any restrictions.

May 27, 2009 | 1996 Chevrolet Cavalier

1 Answer

1995 toyota pickup, surging at around 2000 rpms


Is the check engine light on?

A major cause of surging is either air leaks between the air flow meter and the engine intake manifold, or a bad or mis-adjusted throttle position sensor.

Feb 24, 2009 | 1995 Toyota Pickup

Not finding what you are looking for?
Cars & Trucks Logo

238 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

yadayada
yadayada

Level 3 Expert

60792 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

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

Answer questions

Manuals & User Guides

Loading...