1950? S-10 tdi

[burnin oil]

Glad the good old hammer mod worked for you. I had several injection pumps on the jetta since you can't buy the internal timing ring that's electronic. The worst offender so far was a junkyard scored brand new bosch factory reman. I had to hammer it over until it idled like an old diesel truck to get any off idle power. It shakes a little but now runs good. Makes me miss the 11mm pump.

Check the turbo arm. It's the waste gate looking thing. It actually controls the variable turbo and how the vanes are set. In other words they control how the initial boost begins to come on. Also a leak in the intake tract after the MAF will seriously defuel the motor. Hammering the pump can mask problems here since you are adding more fuel to the mix even though the computer thinks it's in stock trim. As far as I understand the programming, the computer has no idea what the actual fueling is and only blindly adds or subtracts it based on what it thinks it is receiving.