Quote:
Originally Posted by 6DoF
i ended up "adjusting the pump" ... by hitting it with a hammer. seriously though, i forget the metric, but with the engine running and the VGT cable plugged in as i watched a specific value. my issue was it idled like crap. loosened the bolts on the top of the pump, not so much it leaks, smacked it with a hammer a few times til the value landed in range, and instantly the idle was perfect. tightened the bolts and game on, weirdest thing ever.
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Yes I did the hammer adjust on Thursday made it a bit better up to 8psi now lol
Quote:
Originally Posted by 6DoF
i also had vacuum leaks that would keep the turbo from fully kicking in, check for leaks.
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The only thing vacuum does for me is brakes and wipers
Quote:
Originally Posted by rusty76
Truck is really turning out nice!
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Thank you. It's nice to drive.
Quote:
Originally Posted by 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.
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This one is controlled manually with a psi wastegate, I confirmed and I have it wired shut for now. I have the vacuum controlled variable vane on my Jeep TDI and played with it enough to learn how it works. thanks for the info.