Re: [MBZ] Timing problem 87 300D Turbo

[Peter Frederick]

First thing is to check the cam timing -- when the marks on the cam are 
lined up, where is the degree wheel on the crankshaft?  Make sure you 
sight over the marks, they are a bit more difficult on the 603 than on 
the 617.  Should be a notch in the thurst washer and a mark on the 
front cam tower, I don't remember at the moment, will check my book 
later.

Injection timing is more difficult -- you must have the lock tool that 
screws into the side of the IP at the rear after you take the plug out 
OR a drip tube of some sort on #1 position on the IP.  Not the same 
timing, either -- if you use the lock tool, the tool should engage the 
locking tab at 15 degrees ATDC at the crank.  Using the drip tube, fuel 
should stop running out at 26 degrees BTDC as the plunger rises to 
cover the intake slot in the sleeve inside the pump.  If you used a 
drip tube, you are probably right on for timing and there is something 
else wrong.

Did you put different fuel than usual in the last tank?  What color is 
the smoke?  Blue, gray, white, black?  Does it idle properly if you 
push down on the pedal instead of letting the idle control system work?

Do you have fuel leaks, either at the injection lines (pump or 
injectors), or in the fuel lines?  The tiny injector lines on these 
engines crack fairly easily, and it will idle horribly, and the fuel 
lines can leak air in on the suction side, causing all sorts of running 
problems.

Peter