PeachParts Mercedes-Benz Forum - View Single Post - 1990 Mercedes 560 SEL

ps2cho · #23 12-20-2016, 08:49 AM

Something is very wrong if you need the cold start valve to run the car and what he did was a waste of your money.

If you are getting adequate fuel flow from the pumps, the fuel distributor is not blocked or leaking internally and the EHA is good, you can disconnect the cold start valve and the car will run fine.
Ebay fuel distributors and EHA's are usually junk and just end up giving you a different issue. "Pulled from a working car" means they found it at the junkyard on a crashed car. They have no idea if it was working or not, they just assume it is.

If you really are intent on getting it running, get a remanufactured fuel distributor and new EHA flow tested from CIS Flow Tech. Based on what you describe, I would lean towards an EHA issue, or the mixture is way off, but you need a mechanic who knows these older MB's and your guy doesn't. You'll end up with more stupid stuff like wiring the cold start valve...