VW Vortex - Volkswagen Forum banner
1 - 15 of 15 Posts

·
Registered
Joined
·
262 Posts
Discussion Starter · #1 ·
Problem - Loss of Power. Fuel filter loses prime.
Obvious problem. #1 and # 2 Return cloth covered lines wet and # 2 leaking with a little pressure on low pressure fuel system. Ordered new vw/MERCEDES 3.5mm line (on-line). In the interim, used rubber fuel return hose available at Advanced auto. (Because could not get the VW 3.5mm cloth covered rubber line locally).
# 2 injector behind pump would not stop leaking. Fuel filter still loses prime.

Pressurized fuel system and leak will not stop with rubber hose. I tried some used pieces of cloth covered hose with no avail. Bottom nipple on #2 leaks.
Swapped @ 2 injector with # 4 to eliminate possible cracked output nipple on #2, but the new # 2 leaks at rubber hose. Old #2, now # 4 does not leak at rubber cap.

May be as simple as wait for cloth covered 3.5mm hose, install and test with pressure, but the rubber hose should have held temporarily.
It takes a little pressure to create leak, but it always leaks at #2 bottom nipple. And it definitely loses prime.

This is a daily driver, the cloth cover return lines had only @ 50K (2yr) so little early to be aged, vehicle normally gets about 700 miles per week on it. Recent problem.
Been driving VW diesels since early 80s, never had one lose prime with aged worn return lines. But it loses prime and will not self bleed fully. Will self bleed enough to run. Pressurize prime, and it fires up. with full power, but slowly loses prime. Less fast than at first, but definitly not driveable.

Incidently -New fuel filter, new Air Filter 3/4 tank. No other leaks. http://****************.com/smile/emthup.gif
So while I wait next week for 3.5mm cloth covered rubber hose to be fedex'd I am asking myself, is there something else that contributes to losing prime and loss of power.
Tank is venting. I am using the vent hose at engine bay to pressurize tank, so know I have vent. Removed fuel cap and it pressure won't build. So I am venting.

I guess the cloth cover acts as a clamp on this line. I feel like a fireman who can't put out a fire because I am missing something and cant build water pressure.
This will be the last time I am out of this cloth covered rubber hose. I ordered enough for 3 vehicles.

I am writing this because there is no priest locally and I am not catholic anyway, but frustrated enough to be quite sinfully foulmouthed about my little truck being grounded. I'd really be perturbed if the cloth covered rubber hose does not fix it.
Wayne
 

·
Registered
Joined
·
1,409 Posts
Re: 1.9TD IDI Loss of Power (DogDiesel)

I ''think" the VW dealer is supposed to carry the stuff.
But you might not be as blessed to have a local dealership.
I have one local, but don't seem to call on them until all else fails.
I bought the German weave hoses recently from T-Hoff on eBay.
$1.25 per foot for vacuum
$2.25 per foot for yellow stripe diesel rated
Bought 3 feet of each.
Fixing to start primping up another mk2 1.6 soon.
When I order the hoses for it - think I'll order some spare, since I'm not catholic either.
 

·
Registered
Joined
·
1,084 Posts
Re: 1.9TD IDI Loss of Power (DogDiesel)

I've had some pretty crappy/leaky returns and it never affected the drivability either...... Just makes a mess and wastes fuel... The Hard steel line to #2 injector wouldn;t happen to have a crack in the end of it... Maybe allowing fuel to drizzle out and look like the return? Although this shoudl have no bearing on the prime into the filter and pump, it woudl make it run like crap..... The rubber stuff doesn;t last long but as you said, should work temporarily...
I'm guessing this was going on before you changed the fuel filter.. (if I remeber correctly from the alternator post) That should rule out something odd like a bum filter... Never heard anything about filter housings cracking unless somone goes He-Man on one...
My thoughts would be lift pump or air leak before the pump and it sounds like you have the air leaks worked out...
Something that happened to me at one point on a 240D, and this drove me batty for a bit... THe Rubber hose leading from the steel line on the body, to the filter had started to basically come apart on the inside... With sucktion it woudl pull the separated part of the hose together and block the fuel.. I could blow thru the line with air either direction with no trouble, but as soon as I put suction to the outlet side of the hose with fuel in it it would collapse and restrict the fuel... That isn;t one of those things that happens very often thoug...
Good luck and let us know how you make out...
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #4 ·
Re: 1.9TD IDI Loss of Power (maxfax3)

Checked that hard line. No the leak is at the nipple on # 2. At rubber. Leak will not manifest w/o pressure. It loses prime. Will not idle well until primed. Purrs like a kitten when primed, but sucks air slowly into system.
I of course have always kept a roll of this stuff on hand in my "next part needed bin" but this time I was caught empty handed. Matter of fact I used my last of roll on one of my Mercedes.
On my Mercedes (I have several), a wet line means nothing but wet line. This one makes this little truck gutless and hard to start until primed. Which is why I am thinking out loud and in forum that it could be something else beyond a cloth covered rubber hose.
Replaced vent line tank to spout @ year ago. Today, checked all rubber connections. No hard line leaks.
I had 5-10 PSI pressure on low fuel side to make/find leak.
I am thinking that if I had cloth covered rubber hose and apply pressure, I might find real leak...
This is what I get for moving away from the city to the middle of now-where, where nearest dealer is 1.5 hour away. A simple part shuts you down.

But I found I needed part with lil truck in my yard, not out there on the road stranded. It could be worse.
Found the alternator before it stranded me, as well a few other parts wearing. Just the idea of being shut down and parked in yard for a little piece of cloth covered rubber hose.

Wayne
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #6 ·
Re: 1.9TD IDI Loss of Power (burn_your_money)

I haven't checked since about four days ago, and it was tight then. There was no play in the pulley. http://****************.com/smile/emthup.gif
Let's look at the symptoms, again. Low pressure system loses prime. Pressurize and prime, and the thing cranks immediately, runs smooth. Full power. Had leak at #2 injector lower nipple. Need cloth covered rubber hose. These are facts. I may arbitrairly replace each of he connecter hoses from the tank. The real symptom to correct is the fuel system losing prime.

Will check pulley again when I get back in town and after I install the cloth covered rubber hose. Lil truck has to sit while I take another vehicle to the airport. Will get at it Friday or the weekend. http://****************.com/smile/emthup.gif
Wayne
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #7 ·
Re: 1.9TD IDI Loss of Power (maxfax3)

Installed the new cloth covered hose on return line and re-primed. Did not completely solve problem.

Funny thing, just realized I have replaced near every rubber hose on this vehicle in the last six months.
Like I have been in some chemical area.... My vacuum pump hose is bad too. Everything new when engine installed. Already, I have replaced all coolant hoses.
Problem is not resolved, but better. Now I loose prime on 5 mile run, never completly shut down, but can shut it down for 30 seconds and it will start again with full power.
Putting it up on ramps and stands and will replace all input line splices.
Its a fuel problem still.

Wayne
"Something that happened to me at one point on a 240D, and this drove me batty for a bit... THe Rubber hose leading from the steel line on the body, to the filter had started to basically come apart on the inside... With sucktion it woudl pull the separated part of the hose together and block the fuel.. I could blow thru the line with air either direction with no trouble, but as soon as I put suction to the outlet side of the hose with fuel in it it would collapse and restrict the fuel... That isn;t one of those things that happens very often thoug..."
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #8 ·
Re: 1.9TD IDI Loss of Power (DogDiesel)

FIXED. http://****************.com/smile/emthup.gif
Replaced the two large fuel lines at the tank and full power.

While there was no actual leak, there was wetness on cloth of both lines. Was sucking air, evidently.

Two years ago, I had replaced these lines when I had it up on jack-stands doing the exhaust.
Because there was dampness on cloth. I found the large cloth covered hose at a local foreign auto parts store. This time I just used 3/8" rubber fuel hose.
I find it an irony that almost every cloth covered rubber hose on this Caddy was leaking (sucking air). Replaced fuel and vacuum hoses; alll. Recently all coolant lines replaced. The scenario defies logic.

Oh, well, back on the road.
 

·
Registered
Joined
·
1,084 Posts
Re: 1.9TD IDI Loss of Power (DogDiesel)

http://****************.com/smile/emthup.gif You may have jest been the poor lucky SOB that got line from the crappy lot.. I've had what was to be quality lone fail in that amount of time, or less..
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #10 ·
FOLLOW UP: 1.9TD IDI Loss of Power (DogDiesel)

Over 400 Miles. Problem solved. Bump, she starts. Plenty power.
Crank pulley tight.
The lines were brand new less than 2 years ago.
Now for the commentary: Bought 7.5 feet of the injector hose at a foreign car shop in Richmond (70 miles away) for $10.66. Tired of waiting for online order.
I had already ordered some online, but the line was dropped in an envelope (2 days after payment later) and arrived by snail mail in nine days. I'd been driving it 2 days by then. Have plenty of the stuff now. Needless to say, I won't run out of this line again, and I will of course replace at first sign of deterioration.
This was one of those: what were you thinking; didn't you notice the signs. Mileage had dropped 4-5MPG and there was wetness on cloth.
I was as much peeved at myself as the situation & car, thus the catholic fess up comments. I had just got busy flying around, jumping in the little truck - home - just on weekends.
No excuse. I was going to the airport in Richmond and felt the first loss of power. Four days later lil truck didn't want to start, but when did start, I made it 85 miles home and there it sat in my driveway, and the locals didn't have the hose.
I'll get busy like always again, but this fuel problem won't happen again.
Wayne
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #13 ·
Re: FOLLOW UP: 1.9TD IDI Loss of Power (maxfax3)

Yep, and sure enough it did.
First cold day, that SAE rubber hose started sucking air at clamp area. I felt a hiccup while on cruise, turned around, and started driving home (@ 30 miles out). Made it home and by then it was gutless. Found the larger 8mm cloth cover rubber hose at Bap Geon in Richmond, VA (bought 8 feet). Stuff was $1.10 a foot.
Cheap.
Comment about using plain rubber hose. NOT. Temp fix only. Disreguard. Find right stuff,
Since mid 80s, I have owned a VW pickup - this one since 2000. Their little Quirks are minor.
"You're good to fly till the next quirk makes itself known..."
 

·
Registered
Joined
·
1,084 Posts
Re: FOLLOW UP: 1.9TD IDI Loss of Power (DogDiesel)

The little quirks give me character... You pretty much guarenteed it's gonn run till it rusts in half, and the heat will always be good...

Rubber fuel line ain;t what it used to be... I won;t even use it on somthing carburated... That stuff looks worse in a year than the 20+ year old stuff looks that I take off.. I've found that low pressure hydraulic line, or the high pressure fuel line for fuel injection seems to last much better.. The "Viton" stuff is pretty good for about anything too...
 

·
Registered
Joined
·
262 Posts
Discussion Starter · #15 ·
Re: Rusty Caddys: 1.9TD IDI Loss of Power (maxfax3)

When it comes to VW pickups, I am pretty fortunate with this one.
I bought it in Dallas, down in the republik of Texas, US of A.
There is not one spot of rust on my lil truck--STILL.
It still has original paint. Which really still looks good. Clean lil truck.
And Yeah great heater. http://****************.com/smile/emthup.gif
They don't make em' like this anymore...
Wayne

"The little quirks give me character... You pretty much guarenteed it's gonn run till it rusts in half, and the heat will always be good..."
 
1 - 15 of 15 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top