Jetta TDI stalled on veg, now won't start
April 23, 2012 - 7:44pm
Well guys, the subject line pretty much says it all. Looking for some advice from the experts out there. My 2002 TDI stalled on vegetable oil when i was idling at a stop sign, then completely quit. I immediately purged to diesel and attempted to start...nothing. I know it's not the starter, battery, or alternator, so this must be a lack of fuel problem. No lines are broken, but I noticed a slight diesel leak where the #2 injector line connects to the pump and some diesel leaking from where the glow plugs sit. Any advice on where to start diagnosing this would be greatly appreciated. Also...the car died on veg oil, what can I do so the engine/IP don't get destroyed in the process?
Thanks,
TomB
April 24, 2012 - 10:44pm
#2
Checked timing belt and no issues; still have 40,000 miles before the change is due. I've tried starting the car on straight diesel about 5 times holding the key for about 4-5 seconds each time. If my IP lost prime, do I just keep trying to start it up? Am I going to destroy any components in the process? Something feels wrong about continuous attempts to start the car without it turning over. I'll be checking the anti-shudder valve tomorrow to see if it is closed and continuing to try and diagnose the problem. Although, I feel pretty confident that this is IP related...maybe some bad oil or possibly clogged the IP...
Some additional info:
Right before the car stalled, I noticed the engine starting to shutter and lose power when on vegetable oil, and it's been almost 3000 miles since my last filter change. Naturally, I just figured I would change the filter and call it a day...just confused why car still won't start on diesel.
April 25, 2012 - 12:43pm
#3
http://forums.tdiclub.com/showthread.php?t=199038
http://forums.tdiclub.com/showthread.php?t=128812
Hope the above two links help.
Check the anti-shudder valve, the Relay109 and the fuel cut-off solenoid on the IP.
If the Relay109 is good there will be battery power to energize fuel cut-off solenoid when key to start/on.
Please post the findings.
May 3, 2012 - 11:01pm
#4
Veggpwr,
Saved the day again! Thanks for the tdiclub link. Indeed, it was the anti-shudder valve. Free gallon of grease if you're ever passing through Louisiana haha. While I'm busy asking questions, I might as well throw another one your way.
Have you ever come across anyone complaining of tightening the compression nut in the tank so tight that it deforms the PEX and restricts fuel flow? Even if the compression nut is overtightened, I can't see deforming the PEX significantly enough to cut off sufficient fuel to the injectors. This wasn't the culprit, but it's one of the problems I initially thought could have caused the engine to stall.
tomb
May 4, 2012 - 5:03pm
#5
TomB,
You just lighted up my day! Glad to see you come back and updated the fix so I know I did helped someone and some forum readers (including me) can benefit from reading the post.
Free gallon of grease if you're ever passing through Louisiana haha.
Thanks for your kindness and I am taking the rain-check. Is there any limits on gallons? Sorry, I have a big truck. I am going to cash the check in the future, don't know when yet!
BTW I am in Staten Island, BIG APPLE and I can share some grease too.
Have you ever come across anyone complaining of tightening the compression nut in the tank so tight that it deforms the PEX and restricts fuel flow?
No. I didn't come across someone...
But Yes, I did read one or two posts from this forum that it did happened and I believed it. It happened on trucks (from the post).
Even if the compression nut is overtightened, I can't see deforming the PEX significantly enough to cut off sufficient fuel to the injectors.
It would restrict fuel to injectors when you put a heavy foot on the go-pedal. You would feel lost of power (fuel starvation).
This wasn't the culprit, but it's one of the problems I initially thought could have caused the engine to stall.
Don't think it would cause the engine to stall. The engine would runs normal at light load unless it deforms BAD (LITTE or NO flow).
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stalled on vegetable oil when i was idling at a stop sign, then completely quit. I immediately purged to diesel and attempted to start...nothing.
Looks like not veggie related.
Try to start with diesel first.
I know it's not the starter, battery, or alternator, so this must be a lack of fuel problem.
I guess you don't have a lift pump for diesel or veggie. The IP is also your lift pump. Suspect your IP is not working.
How old is your timing belt?
Open the timing belt cover, crank engine and check the timing belt. If the belt is good then your IP is not pumping.
The IP could loss prime or defective.
Since the engine stall in veggie so it would take a while to crank to clear the veggie before the engine tries to start.
__________________
'05 Cummins CTD 24V HPCR RAM 2500 QC SLT SB Black 4X4 48RE 325 hp 610 ft.lbs
GC Kit + 3rd Tank WVO(80%)/RUG(20%) + Co-Pilot
3-Tank Operation managed by Co-Pilot: Blending(warm up) / Veggie(hot run) / Diesel(purge for next start)
Smarty Jr 40/70/100 hp (Timing Map Modification)