Hi
I am the new owner of an RS6 AVANT MTM conversion, having been a BMW owner for years this is my first Audi.I have owned the car for 3 weeks and it has developed a weird problem which I would appreciate some help with.
Car starts and runs fine from cold but if I stop and engine is at normal running temp, it will not restart.
I checked for voltage at fuel pump at this juncture and found none
Car would then restart at around 65-75oC
I had it tested and a fault was indicated on the fan which I do not believe operated since I bought the car
I changed the coolant Temperature switch at the back of the engine and the fan now works but the temperature problem with the fuel pump still exists annoyingly
does this temperature switch feed into the Fuel pump drive module also......
Is the fuel pump drive module goosed !
Has anybody got any ideas as it is a right royal pain sitting around waiting for the engine to cool before starting
Thank You
FUEL PUMP CUT OUT AT TEMPERATURE
FUEL PUMP CUT OUT AT TEMPERATURE
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
-
posterboyj
- 4th Gear
- Posts: 652
- Joined: Thu Oct 16, 2008 6:44 pm
- Location: Suffolk
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Faulty Crankshaft sensor.
Cornishmoocher wrote:Buying an RS6 and then worrying about the fuel consumption is a bit like buying a boat and worrying about getting it wet.
Re: FUEL PUMP CUT OUT AT TEMPERATURE
+1
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Hi
The crankshaft sensor controls the injectors (timing) not the power to the fuel pump surely ?
The crankshaft sensor controls the injectors (timing) not the power to the fuel pump surely ?
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Which fuel pump did you test? And at what moment did you test it / them?
The ECU controls the fuel pump module which controls the fuel pumps. If the crank position sensor is faulty the ECU won't attempt to start the engine. So it may not power the fuel pumps. If the engine is not cranking or not running then there won't be any power at the fuel pumps anyway.
The ECU controls the fuel pump module which controls the fuel pumps. If the crank position sensor is faulty the ECU won't attempt to start the engine. So it may not power the fuel pumps. If the engine is not cranking or not running then there won't be any power at the fuel pumps anyway.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Could be faulty fuel pump relay, too.
Or X-relief relay.
Given the low (relatively) cost, I'd change both.
Or X-relief relay.
Given the low (relatively) cost, I'd change both.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Hi
1. Tested the voltage to fuel pump in the tank whilst cranking the engine when hot...no voltage indicated
2. When engine is at 65 oC it powers up and car starts
Where exactly on the car is the fuel pump relay and other part you mentioned....might just change the crankshaft sensor at the same time
Many Thanks
1. Tested the voltage to fuel pump in the tank whilst cranking the engine when hot...no voltage indicated
2. When engine is at 65 oC it powers up and car starts
Where exactly on the car is the fuel pump relay and other part you mentioned....might just change the crankshaft sensor at the same time
Many Thanks
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Also if the crank sensor was faulty it would have an adverse effect on the car when it was running, but mine runs fine when running.
This all seems temperature related as mentioned origionally
This all seems temperature related as mentioned origionally
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
Re: FUEL PUMP CUT OUT AT TEMPERATURE
have you run Vagcom ?
The ECU controls lots of things from information it gets from loads of sensors. If One sensor fails the ECU will cause other things to happen , or not happen as the case may be
The ECU controls lots of things from information it gets from loads of sensors. If One sensor fails the ECU will cause other things to happen , or not happen as the case may be
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Hi
Havent run a Vagcom yet, cant get the car to one ...wont start now even when the fuel pump runs on initial trying to start !!!!
Getting pissed as the machine cost me a fortune and it wont run
Havent run a Vagcom yet, cant get the car to one ...wont start now even when the fuel pump runs on initial trying to start !!!!
Getting pissed as the machine cost me a fortune and it wont run
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Can't get your car to Vagcom? Where are you? Someone might be able to help you out.
previous- Pug 205 gti, 306 gti, 309 gti Goodwood.
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Just been on another site AUDIZINE and I must say the guys on there are really helpful
Think I got the answer to my problem...will post result soon
Think I got the answer to my problem...will post result soon
E28 M535i
E39 M5
IMPREZA 22B
E39 M5
IMPREZA 22B
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Well don't leave us in limbo ! what have they suggested to you to fix it ?
Re: FUEL PUMP CUT OUT AT TEMPERATURE
Real shame we don't have any helpful people on here 
Lets hope you get it sorted and don't have to come back on here.
Lets hope you get it sorted and don't have to come back on here.
previous- Pug 205 gti, 306 gti, 309 gti Goodwood.
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!