Help! I'm stumped!
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1st Gear
Joined: Jun 2012
Posts: 4
Help! I'm stumped!
1999 Audi A6 quattro (US)
150,000 miles
Previous owner had timing belt changed (apparently)
Almost new battery
Driving home last night and all of sudden car stalled and will not start.
Before shifting into neutral (while car was stalled, and rolling) a semi hard thud was felt (before I thought to get into neutral). I'm thinking this was just the tranny grabbing or the engine coming back slightly as it felt more like the tranny but I thought it was worth mentioning.
It cranks but will not start. You can hear it sparking (tries to start sometimes). I partially disconnected fuel line (threaded) from injector rail to diagnose, turned over, and got nothing. I started pulling relavent fuses (fuel pump, ecu) and none were found to be blown. After doing this I attempted to start, and it did right away, while spraying gas everywhere. I shut off, tightened fuel line and re-started, ran perfect for a few min then just died. Hasn't ran since.
Relay is fine (checked, even tried shorting)
Low voltage at fuel pump fuse, and two of the three ecu fuses (about 5 volts)
Strong 12.5 v at relay contact from battery
No voltage at pump (driver side trunk)
Hard wired voltage to pump (grounded too) to try to limp home and still no gas up front.
Once I hardwired and got nothing I was thinking fuel pump but why would there still be no voltage at it?? But on the other hand why no fuel pumping? What's going on here?! Why do these things happen on Monday?!?!?!!!? Its still on the road!
Thinking about towing to shop but will they really figure it out or just tell me to take it to the dealer, even then the dealer will end up playing just best guess and replace until they find the problem...
150,000 miles
Previous owner had timing belt changed (apparently)
Almost new battery
Driving home last night and all of sudden car stalled and will not start.
Before shifting into neutral (while car was stalled, and rolling) a semi hard thud was felt (before I thought to get into neutral). I'm thinking this was just the tranny grabbing or the engine coming back slightly as it felt more like the tranny but I thought it was worth mentioning.
It cranks but will not start. You can hear it sparking (tries to start sometimes). I partially disconnected fuel line (threaded) from injector rail to diagnose, turned over, and got nothing. I started pulling relavent fuses (fuel pump, ecu) and none were found to be blown. After doing this I attempted to start, and it did right away, while spraying gas everywhere. I shut off, tightened fuel line and re-started, ran perfect for a few min then just died. Hasn't ran since.
Relay is fine (checked, even tried shorting)
Low voltage at fuel pump fuse, and two of the three ecu fuses (about 5 volts)
Strong 12.5 v at relay contact from battery
No voltage at pump (driver side trunk)
Hard wired voltage to pump (grounded too) to try to limp home and still no gas up front.
Once I hardwired and got nothing I was thinking fuel pump but why would there still be no voltage at it?? But on the other hand why no fuel pumping? What's going on here?! Why do these things happen on Monday?!?!?!!!? Its still on the road!
Thinking about towing to shop but will they really figure it out or just tell me to take it to the dealer, even then the dealer will end up playing just best guess and replace until they find the problem...
Thread Starter
|
1st Gear
Joined: Jun 2012
Posts: 4
UPDATE: Ok so I'm dumb, the "fuel pump" I was looking at behind the back seats was not the pumps but rather the fuel level sensor (I thought the leads looked a little small)...
Lifted the back seat and removed those two covers one is just a connector with two leads (small awg) (driver side) and the other has 4 leads, two large awg and two small, and also the two gas lines (passanger). I tested the two large leads on the passanger side, 11v on crank, 4.2v key on (relay not engaged).
Now I'm thiniing fuel pump... Sound right?
Another note, its almost impossible trying to find the right fuel pump on advanceauto.com
Edit:
I was just wondering some other things that I can't seem to find an answer to...
Will/should the fuel pump run no matter what if there is voltage at the large leads? <main question
What are the other leads?
What are the wires that go threw the floor pan next to the access on either side?
Where is the BWD and could this be the problem?
Does this look good? http://m.advanceautoparts.com/mt/sho...RPFUE2AMS_____
Is this the best tut around? http://www.audiworld.com/tech/eng95.shtml
The inner return hose is there one second in the pics, and gone the next?? What kinda tut is this, he doesn't even state the year/model!
Does this even sound like a bad pump to just die, then work great for a few min, then die again?? Sounds eletrical to me.
Lifted the back seat and removed those two covers one is just a connector with two leads (small awg) (driver side) and the other has 4 leads, two large awg and two small, and also the two gas lines (passanger). I tested the two large leads on the passanger side, 11v on crank, 4.2v key on (relay not engaged).
Now I'm thiniing fuel pump... Sound right?
Another note, its almost impossible trying to find the right fuel pump on advanceauto.com
Edit:
I was just wondering some other things that I can't seem to find an answer to...
Will/should the fuel pump run no matter what if there is voltage at the large leads? <main question
What are the other leads?
What are the wires that go threw the floor pan next to the access on either side?
Where is the BWD and could this be the problem?
Does this look good? http://m.advanceautoparts.com/mt/sho...RPFUE2AMS_____
Is this the best tut around? http://www.audiworld.com/tech/eng95.shtml
The inner return hose is there one second in the pics, and gone the next?? What kinda tut is this, he doesn't even state the year/model!
Does this even sound like a bad pump to just die, then work great for a few min, then die again?? Sounds eletrical to me.
Last edited by SmokeyA6; Jun 12, 2012 at 02:46 AM.
AudiForums WilkommenVagen Direktor
Joined: Jan 2010
Posts: 2,945
From: Western MD USA
well...
seems like you have a lot going on there. yes, the fuel pump should run if you wire it straight. you could also have a clogged fuel filter (under passenger side wheel well liner IIRC). There are also some engine management conditions that will limit fuel flow. i recommend checking the filter and getting a scan to see if you have any relevant codes. the tutorial you referenced for the fuel pump is pretty standard and should be exactly what you are seeing when you look at yours.
good luck
seems like you have a lot going on there. yes, the fuel pump should run if you wire it straight. you could also have a clogged fuel filter (under passenger side wheel well liner IIRC). There are also some engine management conditions that will limit fuel flow. i recommend checking the filter and getting a scan to see if you have any relevant codes. the tutorial you referenced for the fuel pump is pretty standard and should be exactly what you are seeing when you look at yours.
good luck
Thread Starter
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1st Gear
Joined: Jun 2012
Posts: 4
Update:
Once the car started briefly from hitting fuel pump cap/fuel tank with mallot I decided: fuel pump. Changing fuel pump resolved no start issues. Only took me ~30 min, what a piece of cake! Will be changing filter soon...
I guess the low voltage on those three fuses is normal? Goes to show: The simplist answer is usually the right one.
Thanks for the comment, Beau!
Once the car started briefly from hitting fuel pump cap/fuel tank with mallot I decided: fuel pump. Changing fuel pump resolved no start issues. Only took me ~30 min, what a piece of cake! Will be changing filter soon...
I guess the low voltage on those three fuses is normal? Goes to show: The simplist answer is usually the right one.
Thanks for the comment, Beau!
Thread Starter
|
1st Gear
Joined: Jun 2012
Posts: 4
Ok so now I'm trying to fix my triptronic...
But I can't get the shift **** off! I put into third, pull out on button, and pull HARD but it won't budge. I also tried to slide down the chrome shaft like some people were saying but that won't budge either! Any ideas?? Its really starting to make me mad, I want triptronic!
But I can't get the shift **** off! I put into third, pull out on button, and pull HARD but it won't budge. I also tried to slide down the chrome shaft like some people were saying but that won't budge either! Any ideas?? Its really starting to make me mad, I want triptronic!
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