cold start weirdness

[Kurt W. Deschler]

> I've changed the water temperature sensor as the first part of my
shotgun
> troubleshooting mode. No problems so far.

Mine has the newer 3-pin sensor that I have been assuming was OK.

> What does this mean?
> >" I had to cycle through the cold start diags a few times to give it enough
> gas to start."

I mean ECU output test 4, which cycles the cold start valve with the fuel
pump running. I let it run through all 10 cycles twice and that gave the
engine a good enough prime to start. Wouldn't fire at all before I did
this. Clearly this time the engine was not getting enough fuel to start in
the cold weather.

> Did you check for any codes?
No, but I did check for spark and I could hear the fuel pump running.

> Is the fuel pump relay the same for a turbo and non turbo engine? I may take
> mine apart, inspect and resolder connections.

If it has the fuse slot on the top, then is probably has a circuit board
inside that should be checked. IMO any VAG relay with a circuit board
should be checked for bad solder.

        -Kurt
        '87 5kcstq
        '88 vw gti 16v