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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old March 20th, 2003, 04:47   #1
kell3
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Join Date: Mar 2003
Location: pa
Fuel Economy: 47 40 38
Default TDI LOST POWER

i have a 99.5 jetta tdi with 82,000 on it and it loses power going up hills it dosent do it all the time but it dose it alot pleas help!!!!!!!!! <font color="blue"> </font>
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Old March 20th, 2003, 04:53   #2
VelvetFoot
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Join Date: May 2001
Location: Sand Lake, NY
Default TDI LOST POWER

It is probably your maf.
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Old March 20th, 2003, 08:26   #3
GoFaster
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Join Date: Jun 1999
Location: Brampton, Ontario, Canada
Default TDI LOST POWER

Read the TDIFAQ troubleshooting section. There are many potential causes, and further investigation WILL be required to identify and/or rule out potential causes.
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Old March 20th, 2003, 10:57   #4
kell3
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Join Date: Mar 2003
Location: pa
Fuel Economy: 47 40 38
Default TDI LOST POWER

how do i tell if its the maf
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Old March 20th, 2003, 18:13   #5
VelvetFoot
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Location: Sand Lake, NY
Default TDI LOST POWER

First, you should read the tdifaq above on loss of power; really.

Here's my opinion:
If your power does not return, say if you are on a hill, when you turn off the engine and then restart, then it likely has something to do with your intake. Your intake could be blocked or it could be your maf. I would examine the egr valve by removing the clamp at the valve, pulling the hose, and looking inside. If it is really choked with black gunk, that could cause your loss of power. If you remove the electrical connector to the MAF, and a good chunk of your power returns, then I would say it is likely your MAF. (Note that the CEL will light. It should eventually go away after it is hooked up again, but I'm not sure when or indeed if it will without getting it cleared.)
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Old March 22nd, 2003, 07:04   #6
kell3
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Join Date: Mar 2003
Location: pa
Fuel Economy: 47 40 38
Default TDI LOST POWER

it was the maf so i unpluged it for now thanks
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