PeachParts Mercedes-Benz Forum - 84 300D Why can't I keep this thing running!?

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Quote:

Originally Posted by caswda (Post 3663502)

Did that.. No change just a big mess... :) I'm stumped! I can make it bog down if I lay into it that's when it really starts to get bad I would still go for fuel supply but I've had that auxiliary tank hooked up and there was definitely no air getting to it then and I had the same issues. I just don't know these cars are crazy....

Well if you're sure it isn't fuel then I'd be looking at air.

Has it got a turbo?

Quote:

Originally Posted by Stretch (Post 3664020)

Well if you're sure it isn't fuel then I'd be looking at air.

Has it got a turbo?

Yes it is indeed a turbo, I also noticed that the corrugated exhaust tube has a crack in it. Do you have any idea where I could get one and what would be the significance of it being cracked would have on engine operation.!

I'm sure you can get one here. No effect on running though.

In post #13 you mentioned you ordered a new primer pump, I did not see a follow up after that was installed. The only reason i bring that up is when I replaced them that was a huge improvement in starting ease and also on the power side, but each time on different vehicles I was going from the white cap to the Bosch.

Quote:

Originally Posted by sloride (Post 3664869)

Hi sloride.
Sorry, had to walk away from this mess for a while..
I did replace the primer pump but it did not correct the shutdown problem. I have replaced some vacuum lines that wer missing, One was missing from the EGR valve and the other two where missing from the 2 connections sitting on top of the thermostat area. I assumed that they all went into that control box sitting on top of the valve cover, without a vacuum schematic, I have no idea. With those replaced I have gotten it to the point of not shutting down but it still is definitely not running at full potential. I need to get a hold of a vacuum pump and clear up all of these vacuum issues before moving forward.

Why can't I keep This Thing Running! Solved - Temporary Fix

Well, The problem i was having was definitely The Lift Pump. Here is my temporary fix until I can rebuild. Please do yourself a favor and buy a HOLLEY, Not a Mr. Crapsget...