92 400E - Hard start and boggin during acceleration

[amg280]

Hey guys,

Just this week, my car has started to act funny. It starts up fine in the morning on my way to work. When I go to leave for lunch, it will fire, then die, and then just crank, until I give it gas. Once it fires, it wants to die, so I keep on the gas a little. After about 30 seconds, it runs fine like nothing happened. Just yesterday, I was coming back from lowes, and I went to give it gas, and nothing. It felt like a 2 stroke that wasnt warmed up yet, and just bogggged. It did this for about 3 minutes, and then it was fine, and didnt do it again.

Whats going on with this car? Is it the MAF sensor? I replaced all the ignition parts about 60K ago. My wiring harness has never been done, but never has been a problem. It feels like a fuel or mixture issue. If I unplug the MAF, will the car run on a default program?

Thanks!

Andy

[deanyel]

Check the fault codes - likely to have some. I wouldn't assume 60k mile ignition parts are not the problem.

[JimFreeh]

My ex 93 400E blew the fuel pressure regulator and it didn't set any codes.

Hard to start, sluggish, would die when you got off the gas for a turn.....

Had mucho high fuel pressure, running very rich.

Jim

[amg280]

Ok, I checked the fuel pressure last night, and its right at 50lbs at idle. When giving it gas, it rises a little. So therefore I dont think its a fuel pressure issue.

I didnt have a chance to pull codes yet. I will see if I can do that tonight.

[Larry Delor]

Has it really been sixty thousand miles since you've replaced caps and rotors?

If so, then I am impressed that it ran well for this long.