nrgglider

Hello everybody

well yesterday evening the car was driving and all was good I got back home park the car in the drive way and in the morning the car crank but refuses to start up tried to spray this spray for starting the car to the intake but no success there, connected vag-com found no code. What else can go bad and how to check it

Please I need the car running as it’s my only car (by the way it’s 2002 A6 with 1.8T European ver.)

Any ideas are more than welcome; please let me know if you need any more info

4Driver4

Fuel pump?
Step away from the magic starting spray.

nrgglider

Well I used the same spray to start the car last time I run out of fuel and it started great unfortunately this not the case now

turbo510

The safe way to use a starting fluid spray is to disconnect the rubber intake hose at the throttle body, and give a little shot through the butterfly valve, then hook the hose back up. DO NOT spray into the air cleaner intake.

If you do the correct method and no-start, then suspect ignition.

4Driver4

The safe way is not to use it. There should be no need on a fuel injected car.

jschick

you can also pull the spark plugs and see if they are wet? and then if it has spark.

obviously you need fuel, air and spark. does the car smell like Gas? if it smells and the plugs are wet you could have bad leaky injectors and fouled plugs, although this is not at all a common problem so I doubt this will be your problem. but you need to check the plugs and spark and fuel....

turbo510

I'll agree and don't have any of that stuff. But as long as he's got some, it could be a quick test for whether there's fuel or not.

ECS Tuning-Audi

Could be that the crank position sensor is bad.

This will often times cause starting issues.

Jason

nrgglider

hi everybody i really appreciate the help of all of you well i did some of the tests and here is the results :

speed sensor: ok
spark: ok
fuel pump: didn't hear its starting so removed the cover in the trunk disconnected the electrical connection and discovered when key is out it receive about 3V when cranking 12V

so by the look of thing looks like the fuel pump is bad but what i cant understand is why the car doesn't start when is spry into the intake manifold

any ideas

turbo510

Not sure why you would see 3V with key out, pump is run through a relay, which should not allow any voltage to be there. You also need to check the resistance at the pump's terminals. You can have 12V and no current if the pump's motor is bad. You can also move the fuel pump relay points by hand (with its plastic cover off) to see if the circuit and pump are OK.