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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIII-A3/B4 TDIs

VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old February 4th, 2020, 18:40   #1
Kulha
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Join Date: Jan 2020
Location: WA
TDI(s): 98 Jetta
Default Fuel Lift Pump in Tank

I have a 98 jetta tdi, and the pump in the fuel tank is on the fritz and I want to replace it. Are the pumps the same in gasoline and diesel fuel tanks for this model? Also, I am having a hard time pulling the part up on the internet and I can't really find a part number. Does anyone have any insight?
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Old February 4th, 2020, 18:43   #2
Mongler98
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Join Date: Mar 2011
Location: Northern MD
Fuel Economy: Race: 12mpg, Gandma:65mpg
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There is no lift pump in your car. Part number does not exist for this reason.
What's the issue?
Are you losing prime? Air bubbles? What?
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Old February 4th, 2020, 19:12   #3
Kulha
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Every once in a while the car won't start. So I tap around the fuel tank and then it starts right up. There's no pump in the fuel tank?
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Old February 4th, 2020, 19:15   #4
Mongler98
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Correct. Pull up the back seat and take off the cover for the tank access. Check for wetness. There are check valves that keep the fuel from draining back into the tank you can test them with some pressure from the other side of the line against flow at like 5 to 10 psi no more. They do go bad eventually after 20 years lol. When did you last change the fuel filter? Fuel filter connections. Can also be an issue and same with a leaking IP (injection pump)that's part of the engine. It's right there in front of the head staring you in the face.

Last edited by Mongler98; February 4th, 2020 at 19:17.
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Old February 4th, 2020, 19:34   #5
Mozambiquer
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The TDI doesn't have an in-tank pump, if I remember correctly. It just has the injector pump on the engine, which has a built in lift pump. What's the problem you're having?

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Old February 4th, 2020, 20:10   #6
Kulha
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Quote:
Originally Posted by Mongler98 View Post
Correct. Pull up the back seat and take off the cover for the tank access. Check for wetness. There are check valves that keep the fuel from draining back into the tank you can test them with some pressure from the other side of the line against flow at like 5 to 10 psi no more. They do go bad eventually after 20 years lol. When did you last change the fuel filter? Fuel filter connections. Can also be an issue and same with a leaking IP (injection pump)that's part of the engine. It's right there in front of the head staring you in the face.

Ok those are great leads, thanks. I will follow through tomorrow. I bought it in August and just rolled over 300k and running great until... you know. Thanks again. Are there other things to look over for a 98 with 300k? Previous owner was good with servicing and keeping records. Timing belt was done before purchase. Thanks again
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Old February 4th, 2020, 20:15   #7
Kulha
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Where are the check valves?
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Old February 5th, 2020, 03:02   #8
Mongler98
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At the hoses going in to the tank under the rear seat acsess.
Or is it in the trunk? Been a while on that. I think it's actually in the trunk behind the passenger side rear seat?
Anyways. The timing belt is critical. Check the paperwork when it was done and by whom. Not just in miles ago but also years in age. It's only good for 80k or 5 years. Plenty of old brittle parts on there. Be careful with plastic items like the oil puck and breather tube.
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Old February 5th, 2020, 10:51   #9
Steve Addy
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Tank sender access is in the trunk, not the back seat. There's a panel that has your build decal on it and it's three phillips screws to take it off. The check valves are very close to and accessible via that panel. That also lets you pull the tank sender.

It's likely that the rubber hoses back there are finally starting to have integrity issues, time to replace them maybe. The check valves can go bad too but that's less likely. I have seen cars without them though...

Timing belt change interval is not 80k miles, it's 60k miles.

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the magic triangle spins in the peanut and then apex seals come out
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Old February 5th, 2020, 11:00   #10
Kulha
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Where should I buy the sending unit?
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Old February 6th, 2020, 22:01   #11
Steve Addy
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Quote:
Originally Posted by Kulha View Post
Where should I buy the sending unit?
Good question, I might try and see if anyone is parting a Mk3 in the FS section. There's also a tdiparts group on FB and some still sell a few parts via vortex too I think.

The part number for new is 1H0919183 if you need to look for a new one.

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97 Jetta TDI, 90 B3V TDI, 92 MB 300SD
the magic triangle spins in the peanut and then apex seals come out
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Old February 7th, 2020, 02:54   #12
Mongler98
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http://forums.tdiclub.com/showthread.php?t=501965

It's my mk3 tdi. I wont be using mine . Works fine. About the same milage as yours.
Make me an offer.
Willing to ship but all transactions will be though PayPal.
Let me know. I can have it pulled this weekend.

Last edited by Mongler98; February 7th, 2020 at 03:06.
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