Hi all,
I've had several 617's over the last 15 or so years (and still have a 82 300sd), so almost a year ago I bought an '87 300d and I love it, but alas I'm not as familiar with all the monkey motion yet as I would like to be.
First, I would like to thank gsxr, babymog, sixto, brian carlton, jeremy and all the others whose posts I've been reading lately. You guys have been a huge help to me to understand the 603.
Now the problem: My car still starts like a champ, idles very smooth, accelerates great UNTIL about maybe 2500 rpm, then it falls flat on its face. Just a total loss of power, kinda bucking, like its not getting any fuel. I can lift up outta the gas and slow down, and its smooth as silk again.
Sometimes I don't drive the car everyday and it sat for about a week before these symptoms started. It was fine before, adding to my confusion.
Things I've done so far:
Remove the gas cap (as I did notice a vacuum hissing, thought the vent was plugged) no change (NC)
Change both fuel filters (they were due anyway) NC
Hooked up a bottle of fuel (thinking maybe the tank screen was plugged) NC
Cleaned ALDA lines, switchover valves, press. sending unit. NC
Removed ALDA NC
Installed another (used) fuel pump NC
Checked exhaust pressure by installing a gauge where there is a plug on the manifold ~ maybe 2-4 psi. From this I guess the cat. is OK
Also, I connected a pressure gauge to the intake manifold and the most I got while driving was about 7 psi. Now I'm wondering if the wastegate is possibly stuck. But it still kinda feels like it could be a fuel starvation issue.
So I guess my question is is there a way to check the wastegate while its on the car? Or maybe someone has a better idea of what I should try next.
Sorry for the long winded post and thanks again for all the valuable info here.