VW mk3 2.0 VW ..guidance please

MdubyaVWer · #1 (**permalink**) 02-11-2009, 12:10 PM

we've had our 95 jetta 2.0 manual tranny for 10 years. while driving 2 days ago there was a hissing from the engine compartment for about 5 seconds. then the car stalled, it barely crept across the intersection into a parking lot. immediately the passenger cab smelled like sulfur for about half a minute. the car would not start back up. the car cranks great but will not fire up. i have the car in the garage now. i put the key in to check if i hear the fuel pump. i hear nothing from the pump. i pulled the hose with the blue arrow going to the fuel injectors to see if fuel would be present a few drops trickeled out with no real pressure, i was not turning the key when i did this. i was wonderin if anyone(s) can guide me to the fuel pump relay, tell me if i can test this relay and how, because i donot hear the fuel pump i'm thinking this may be the problem. before i proceed i'd like to have some ideas as to checking the relay and or the fuel pump to see if there faulty. thank you.

Musicmaaster · #2 (**permalink**) 02-11-2009, 06:44 PM

first of all i would pull that hose off again and turn the key to see if it pressurizes....if it does not pressurize then get someone to turn the key while you are holding the hose to see if it does pressurize.....

if you dont get any fuel out at all then you either a bad pump HOPE YOU DONT!!!! or yes the relay.....now as far as i know the relay is a 167 relay and its # 12 on the box....the far right one i do believe....Now i think that the pump is supposed to run and pressurize even before the motor starts...when your auxiliary is on...or meaning key turned....

Now for the test....If you pull that relay out you have a set of pins on the relay...if i remember right it should be number 30 and 87 that you need to jumper...they should be right across from each other....but first you must remove the cover on the relay but be sure not to touch it in there or you may damage it....now if you take and attach a wire on either one of the pins then put that to a good ground source...then take 12 VOLTS and has to be that...no more or you might blow the relay if its not already....and put it on the other pin...if the relay is good then the little tab on the other side of the coil should snap shut...if it doesnt then your relay is bad...simple as that....

MdubyaVWer · #3 (**permalink**) 02-11-2009, 08:27 PM

I'll be working on the car tomorrow. I'll use your advise on checking the relay. i will have a partner turn the ignition to acc. while i pull the hose off to check pressure, question: do i want to see the fuel trickle out or am i looking for a sign of a more pressurized fuel? Also, as much as i appreciate your help, can you forward me some additional info if possible, ...i found instructions on how to change a fuel pump in a 96 jetta, instructions said you can access pump through the trunk and a panel, seemed pretty straight forward, just wondering if that sounds about what the replacement would consist of? or is this a tank drop job? thanks again.

Musicmaaster · #4 (**permalink**) 02-12-2009, 05:54 PM

also have him turn the motor because you should see a good flow of fuel there...and that answers your question...there should really be no trickle just a good clean flow....

and there is really no more information i can tell you is that whatever your relay is powering you are going to need to have voltage running from pins 87 to 30...or 87a depending on if it has 5 pins or 4 pins...if its 5 then you have an 87a...it just means it will be switching between two things...pins 86 and 85 go to your switch but thats really complicated and we can bipass it by what i said earlier...because the voltage will go from pin 87 to either 87a or 30...all you have to do is ground 30 and put power onto pin 87....the voltage will run through the coil and if the relay is working it will try and run the power through the ground...thats when that contact will click* allowing for voltage to pass through.....you can sometimes hear it click...but if you look on the side of the coil you can see if the contact is moving ...if it is then the relay is good and your pump is messed...all the pins should be marked on the relay so it should all be set for you

and as far as replacing the pump goes...i have not done it but on most north American cars it requires to drop the gas tank...but i am not sure about vw...someone else will have to clarify that

MdubyaVWer · #5 (**permalink**) 02-13-2009, 10:48 AM

thanks, your relay guidance is gonna be a tremendous help.

MdubyaVWer · #6 (**permalink**) 02-18-2009, 10:59 AM

Yesterday, i had an assistant turn the ignition key for me while i removed the hose going to the injector rail. I had a good flow of fuel come squirting out of the hose. I wasn't able to test the fuel pump relay so i pulled the fuel relay from the fuse cluster and replaced it with a new fuel pump relay, this is to be sure the relay was good seen as i couldn't test it. The car still will not start. I do not hear the fuel pump activate at all. any additional advise would be great.