1984 Jetta , TDI WE MUST! (1.9 AHU M-TDI)

[burn_your_money]

I'll take a stab in the dark and say partially clogged fuel filter.

[8v-of-fury]

Hmm, yes. I've got the three different style of filter here that eventually needs to make its way on to the car I had a few mornings where it would start and then die and no fuel would be comin through the filter.. so I had to run back in to the house and get some boiling water.

So yes, a clogged filter is probably what caused my stumble the other day.. and is probably robbing me of power!! How RUDE.

I will be using the rabbit spin on type when I redo my fuel lines, the car was a CIS gas car so the fuel lines come up on the drivers side. That is where my filter is now, behind the battery on the tower.

So I'll be looking for a 2 micron setup when I go that route as well, and run them in line with each other. Having my electric fuel pump on the pump side of both filters.

[burn_your_money]

Wouldn't you be better off putting the pump before the filters? They push better than they pull don't they? Even if you stick a 10 micron or something infront of the pump to keep it "safe"... I don't see dual 2 micron filters being easy to pull cold fuel through.

[8v-of-fury]

Sorry a 2 micron pump side of the stock filter. Not dual 2 micron. Stock filters are somewhere between 10 and 15 right?

I dunno if it matters on push over pull, either way they are moving the same fuel no? lol Pushing fuel out one side will cause it to suck fuel in to fill that void, assuming there is no air in the suction side.

[theman53]

no it matters. It will always try to make that 4-7psi, but if you put a filter before the pump it may not ever get there. I put my inline pump right before the filter and feed the filter with it. Works like a champ. Closer you have it to the tank to pull the better the pump will work. I found that out on my bronco years ago.

[8v-of-fury]

OH, well I have had it right up before the filter, like 3 inches of line before filter.

My electrical pump sucks all the way from the tank. Its just a $15 ebay pump too. runs when ignition on, since April 2011.

[burn_your_money]

Stock filters are somewhere between 10 and 15 right?

I thought 5-10 but I'm not sure.

[theman53]

I think you are both correct. Something like 10-15 absolute 5-10 nominal

[8v-of-fury]

Well I blew through another plunger! This one happened a while back.. and I thought I was out of usable plungers.. but I found a few pump heads laying around that had good plungers still in them.

I checked the pumps idle pressures, as I was advised maybe excessive pressures could be sucking the plunger down through the bore on shut down. The idle pressure was around 45psi, on the low side even.

So not the issue.. but then I thought hey wait.. my pressure tester out bolt is not the one used while destroying plungers. So I looked inside my OUT bolt and found all of this;



All of the previous' plungers SNARF. LOL, so I have a new plunger in there with a surgically clean OUT bolt and so far a dozen or so shut-offs without issue.

[410]

Nice!  Does it run any different now aside from shutting off like its supposed to?

[8v-of-fury]

JF! Hard to tell, roads are hard packed snow.. I gots no tractions! Can't go above 1500 rpm without spinning my tires in every gear. Very hard to get the car to warm up

Still having very odd idle issues. Cannot get it to act well cold AND hot.

[8v-of-fury]

On a side note, I serviced most of the electrical switches in my car. Door jamb light switches, cabin light, defrost, headlight, and 4-way. Cleaned up and slathered with die-electric. Everything works perfectly again!

New dash lights all around as well, I have never seen them all light up with the ignition on but lights off before. Now thats awesome.

[RabbitJockey]

woot

[TylerDurden]

...hey wait.. my pressure tester out bolt is not the one used while destroying plungers....

So do you think the OUT bolt was plugged enough to cause the problem due to excessive internal pressure? I would think seals would be leaking before that point.

[TylerDurden]

Also, perhaps periodic inspection (weekly?) to see if any damage occurs incrementally, or if it is one catastrophic event.