Audi Quattro Turbo 5 cylinder on S80 wont start!
Posted: Thu Dec 05, 2019 1:27 pm
Hi All,
I've installed an S80 on an Audi 2.2litre 5 cylinder turbo engine, it has no cam sensor and has amplified COPs (external amps ticked), We're using a VAG hall effect 60-2 rear crank mounted sensor and we've determined that the sensor position is around 75 degrees BTDC (by using an LED on the sensor output and finding the missing tooth gap). Crank Oscilloscope looks good and agrees its 60-2. I have it set up as per instructions from Alex as a 10 cylinder, COP's not selected so it should run wasted spark. Its got 1000cc Bosch injectors @ 3bar. It just refuses to start and run. We have good sparks on all 5 coils during cranking and the diagnostics says it "Synchronised trying to start". Firing order is 12453 and I have double checked that the coils are wired accordingly.
Tried massively reduced fuel in the fuel map. Not done a compression test as yet, we have to assume at present that the cam timing is correct by engine builder. Will be looking at it again tomorrow and doing compression test. Its sort of trying to start, but just wont run.
Anyone got any clues as we've run out of ideas!
Cheers,
Martin
I've installed an S80 on an Audi 2.2litre 5 cylinder turbo engine, it has no cam sensor and has amplified COPs (external amps ticked), We're using a VAG hall effect 60-2 rear crank mounted sensor and we've determined that the sensor position is around 75 degrees BTDC (by using an LED on the sensor output and finding the missing tooth gap). Crank Oscilloscope looks good and agrees its 60-2. I have it set up as per instructions from Alex as a 10 cylinder, COP's not selected so it should run wasted spark. Its got 1000cc Bosch injectors @ 3bar. It just refuses to start and run. We have good sparks on all 5 coils during cranking and the diagnostics says it "Synchronised trying to start". Firing order is 12453 and I have double checked that the coils are wired accordingly.
Tried massively reduced fuel in the fuel map. Not done a compression test as yet, we have to assume at present that the cam timing is correct by engine builder. Will be looking at it again tomorrow and doing compression test. Its sort of trying to start, but just wont run.
Anyone got any clues as we've run out of ideas!
Cheers,
Martin