Open to suggestions, my '85s problems. - PeachParts Mercedes-Benz Forum

winmutt · #1 09-27-2010, 06:11 PM

Months ago I started getting hesitation when driving on the interstate. Filters of course, I replaced those no fix. I did find alot of bubbles coming in, tightened the lines at the back and the went away. Then a month or so later I started getting a death rattle when applying lots of torque at low rpm and only under boost. Never at idle or reving in neutral. A year or so ago when I did the valve stems I found that one of the valve was sticking. Of course I assume that this is my death rattle. However after listening to a video the other day with similar symptoms I am leaning towards the pump causing my problems. Pump has been heavily modified but is also probably running a bit advanced. I have a replacement pump that looks recently rebuilt which I am going to put on first before I get involved in anything to expensive (head). I will probably do a compression test at the same time since all that stuff is in the same area.

Suggestions?

ImBroke · #2 09-27-2010, 07:29 PM

If it's only under boost, I'd probably check the turbo for play first. It's easier than the compression check and swapping in an IP.

winmutt · #3 09-28-2010, 01:12 AM

By under boost I mean preboost.