190D fuel issues driving.
 

I searched and didn't find an answer to my question.

Recent addition- Sedimentator in place of primary fuel filter before lift pump. changed secondary fuel filter 500mi ago.

Symptom: car runs fine idle or putting around, the second I hit a hill or want to go faster then 35mph it just dies out like I have air in system.

So I remove Sedimentator and move it post lift pump after disassembling it and reassembling it, replaced ALL lines under hood upto the one that runs block (fuel heater?) behind airbox to filter.

Car ran fine for 200miles of highway till today, same issue as I was driving out highway, so I check and I have air in my lines. Remove sedimentator, put barb in place no air at idle or revving motor. Pull out and it's fine for about 30 seconds and then im back @ no power and like im sucking in air like a mofo... pull over no air in line.

Come home check ALL lines and clamps no issues and no air bubbles anywhere in the system I can check.

Car has cooled down so I take it for a spin, all it well the first 2mi of me intermittently flogging it (WOT and such) then back @ the same no power barely making it over hills and home. Pull over NO air in lines again.

I am thinking lift pump is going but will go buy some new fuel line and clamps tomorrow and replace everything in the back end of the fuel system.

I will also restore system back to original layout, presently 2nd tank in trunk and that is where the switching happens. Never had an issue before but now it's on either fuel supply which means it is somewhere after the valve.

Also trying to find a website that sold the lift pump in case it is that...

chec the screen in the tank

Tank screen - x2

After that, rebuilding lift pump as opposed to buying outright is a more cost effective option. Kits are available in the DIY links section.

Read post, I have 2 tanks and it does it on both.

I will hopefully after work tomorrow (riding motorcycle in the 28F) be able to put a tee on the line post lift pump and measure the pressure to tell me if it is lift pump or something else...

Thanks for the tip on the DIY lift pump rebuild...

Have you checked your tank breather? you could be pulling a vac in the tank.

So I put a pressure gauge on and ran some line into the car, using a verified working gauge. I got about 12" of fuel up/into the line and it sat at 0psi, so then I crimped the return line and it still sat at 0psi... lift pump fubard?

Hmm I looked and cannot find.

sorry - not DIY, peachparts Mercedes shopforum> Swapshop classifieds > Fastlane Specials


http://www.peachparts.com/shopforum/mercedes-parts-reference-library/183446-om601-602-603-lift-pump-repair-kit.html?highlight=lift+pump