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Volkswagen EuroVan: 1992-2003 (T4) 93 Eurovan Fuel problem


Permlink Replies: 6 - Pages: 1
Last Post: Jul 22, 2007 8:00 PM Last Post By: magic_bus
AlyxR

Posts: 17
Registered: 09/23/06
93 Eurovan Fuel problem
Posted: Mar 17, 2007 7:45 PM
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Okay, I have no idea. I was driving, everything was good, then total loss of power/gas. The EV just died. No fuel was getting to the fuel injectors. We just dropped the fuel tank, and the fuel pump is working. About to put a new filter on.

Is there anything else it could be?

It still turns over just like always and the engine 'almost' wants to start, but no fuel.
FKH161

Posts: 7,632
Registered: 12/29/05
Re: 93 Eurovan Fuel problem
Posted: Mar 17, 2007 7:51 PM   in response to: AlyxR in response to: AlyxR
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Fuel pump fuse or fuel pump relay... bypass the relay and see
if it'll start.
AlyxR

Posts: 17
Registered: 09/23/06
Re: 93 Eurovan Fuel problem
Posted: Mar 17, 2007 8:03 PM   in response to: FKH161 in response to: FKH161
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how do i bypass the relay? We replaced the fuse, and it still won't start.
FKH161

Posts: 7,632
Registered: 12/29/05
Re: 93 Eurovan Fuel problem
Posted: Mar 17, 2007 8:19 PM   in response to: AlyxR in response to: AlyxR
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Attachment FPrelayEV.jpg (56.2 KB)
Find the fuel pump relay (see attached image) and remove it.
Look at the side of the relay (it should have a wiring diagram
on it. Find pin 87 & 30... match 87 & 30 in the relay panel
and bridge with a suitable connector (wire with 2 male connectors).

Fuel pump should now run ALL THE TIME.

You can also remove the fuel line to the cold start injector (at
the right side of the intake manifold) and attach a fuel pressure
gauge or hold the hose into a suitable container while someone
bridges the relay contacts in the fuse box.

If you get fuel and the engine does not start... it's either
no spark or no injector control (ECM).
AlyxR

Posts: 17
Registered: 09/23/06
Re: 93 Eurovan Fuel problem
Posted: Mar 17, 2007 9:15 PM   in response to: FKH161 in response to: FKH161
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Its the injector control, which kind of sucks, because now I have a perfectly good fuel pump that I don't need and can't return.
FKH161

Posts: 7,632
Registered: 12/29/05
Re: 93 Eurovan Fuel problem
Posted: Mar 17, 2007 9:26 PM   in response to: AlyxR in response to: AlyxR
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Relay 3 in the above relay diagram is for the ECM. You can
pull & bypass that relay the same way... 30 & 87.
magic_bus

Posts: 2
Registered: 11/12/06
Re: 93 Eurovan Fuel problem
Posted: Jul 22, 2007 8:00 PM   in response to: AlyxR in response to: AlyxR
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hi - i have a similar problem and believe i have isolated it to the fuel pump. here's where i'm at:

i disconnected the engine main fuel line where it connects to the pressure regulator and attempted to start the van - no fuel came out.

i blew through it and heard bubbles in the tank. i then siphoned the fuel tank thru the same line and was able to drain the tank this way so i am going to assume fuel filter and fuel lines are not clogged.

electrically, the fuel pump fuse is ok as well as the relay (both checked w/ a volt/ohm meter.

i checked for voltage on the panel (got 12volts) and ran the jumper wire between the 30 and 87 terminal (no sound or fuel).

so far, everything appears to point to the fuel pump.

question #1: am i overlooking anything?

I have the early model pump according to the vin number and that pump has been discontinued by VW.

i have heard you can retrofit the later style pump, but have no idea what is entailed.

question #2: what is the difference between the 90-early93 pump and the later late93-on model?

thanks in advance for any help, and if anyone has a early fuel pump i'd be interested in purchasing it.

rob

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