vagcom logged problem on a tdi a3

[Ant FR]

Ok, my mates tdi has developed a strange one, will not start intialy, takes about 15 secs on starter then eventiually fires up. but once running it so loud under the bonnett, does not boost, and loads of black smoke if revvd. it also hunts on idle.

plugged in vagcom and under engine block got

17656 - Injection Start Regulation: Control Deviation
P1248 - 35-10 - - - Intermittent

any ideas exactly what this is and where do we start to try and fix it.

oh its a 110 tdi engine, has about 140,000. this problm appeared overnight without warning, next morning it just would not start.

help

 

[redcupratdi]

17656 - injector system faulty or not working,

Check wiring to injectors for cracks or spilits
Check the timings could be way off
could be the fuel pump broke
or blocked fuel filter

For proper discussion on this code:
http://forums.tdiclub.com/showthread.php?t=115718&highlight=17656

 

[Red ibiza]

On the 110tdi there is no in tank pump, if it takes that long to start then the first place to look at is to see if the there are any air leaks in the fuel pipes the fuel could be draining back to the tank.
Put a new fuel fillter on and make sure all pipes are seated correctly.

 

[stoneyfordNI]

no wiring harness on the 110 injectors either i dont think , thats PDs

 

[claudefrog]

he didnt happen to put petrol in it did he?