Greg_S S2 Coupe 20+ years going strong

[Greg_S]

Engine is now back in one piece, but cant get it to turn over.

Been trying to track down the issue, battery ok. starter is getting voltage but solenoid only getting a couple of volts and cant hear fuel pump when igntion switched over.

Got an 044 pump fitted so can normally hear it when it starts. I assume I should hear this once ignition is switched over to position 2. Using immob the dash lights etc all work, and when you dont you get no dash lights at all.

Any advice appreciated.

[Jamo]

Is timing ok? pin in the flywheel? all crank sensors connected?

You can bypass the fuel pump relay with wire to see if your relay has gone.

ameaing how many relays go on these cars

[newsh]

fuel pump will not run unless the ecu sees crank and cam position sensors in the correct timing.

[Greg_S]

Is timing ok? pin in the flywheel? all crank sensors connected?

You can bypass the fuel pump relay with wire to see if your relay has gone.

ameaing how many relays go on these cars

I can hear the relay going for fuel pump, was trying to find a suitable pickup to check voltage to fuel pump under rear seat, but havent found one yet. May try bypassing relay as you suggest.

Doesnt explain the starter not working either unfortunately

[driftin jo]

As above, fuel pump will not run until engine is turning over.

[driftin jo]

Is timing ok? pin in the flywheel? all crank sensors connected?

You can bypass the fuel pump relay with wire to see if your relay has gone.

ameaing how many relays go on these cars

WTF has the timing or sensors got to do with it, it is not even turning over!
It will turn over even without the ECU connected .

[Greg_S]

Just tested fuel pump relay and looks fine. Since I cant hear fuel pump running or voltage on starter solenoid think it could be immobiliser. Goto workout where the relay is for that behind dash now

[twoqu]

I guess you could just bridge from the main starter terminal to the solenoid with a jumper wire to ruleout the startermotor/solenoid. You should have either full battery voltage on the solenoid wire from ign switch with it disconnected or less 9-10V when cranking I would have thought. Looks like a ign switch issue assuming battery is fully charged.

[nip]

I guess you could just bridge from the main starter terminal to the solenoid with a jumper wire to ruleout the startermotor/solenoid. You should have either full battery voltage on the solenoid wire from ign switch with it disconnected or less 9-10V when cranking I would have thought. Looks like a ign switch issue assuming battery is fully charged.

I agree with the above, greg i had issues with the ignition switch when i left it for 6 weeks, id do as twoqu says and bridge the starter

[driftin jo]

Once again for the hard of seeing,

THE FUEL PUMP WILL NOT RUN UNTIL THE ENGINE IS TURNING OVER.

[robo]

Once again for the hard of seeing,

THE FUEL PUMP WILL NOT RUN UNTIL THE ENGINE IS TURNING OVER.

I agree with the above.

The only way to see if your pump is running is to open the relay (just take the plastic cover off) and press on small connector, the pump will come one.

[Greg_S]

Taken fuel pump relay lid off and tested with a probe and fuel pump runs when power supplied to relay. Looks like immobiliser is too good at moment, just been tracing through where it runs and may try bypassing on ignition switch to eliminate that as the issue

[Acidburn]

If its just not turning over and hopefully nothing major with the immob then check a couple of things.

the push on spade terminal on the starters on the right side
the grounds are good and not damaged
try connect up a battery with a set of jump leads to the starter motor and see if it cranks over. We had this issue with ross's car and thats what we had to do to get it to start. Think it was earth issue's with his.

[Greg_S]

I'll check the earth strap again, havent disturbed strap to body so might have that off and tidy it up. Goto finish off for day shortly as end of working day at garage so will have to attack again in morning

[Audi_CQ]

Once again for the hard of seeing,

THE FUEL PUMP WILL NOT RUN UNTIL THE ENGINE IS TURNING OVER.

My fuel pump runs for a couple of seconds when ignition is turned on. Then stops until engine is turned over. Doesn't Motronic behave this way?