My 1986 300E will die in the middle of the street and not start for 5-10 minutes and then will run for 5 minutes and die, when trying to start it sounds like detonation and wont start, wait a while and it runs normal and then stops dead, I do notice that there is black carbon soot on the back bumper where the tail pipe is and it smell like it's running very rich, it was towed today, anyone know what this could be ? it's getting a good flow of gas to the pressure regulator I suspect an O2 sensor or the pressure regulator, does this car have a computer ? HELP

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles

Jerry,

You've got a CIS injection system that does have a computer to regulate it.

First thing is to get a set of gages on the FI unit and see what the pressures are.

Also check the plate on the intake and see if it moves freely.

there is an adjustment next to the plate, and there are several other possible problem points. Bad fuel distributor, warm up regulator, and the DP pressure regulator (Alzheimer's, can't think of the name) that attaches to the fuel distributor are all possible problem points.

You've also checked the obvious, like the air filter?

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

thanks Jim, I don't believe it's a pressure issue now because there is no in-between, it either runs fine or not at all, could it be a crank position sensor, each of the suspected items cost $160 each
Crank position sensor,
Fuel Pump Relay,
O2 Sensor,
Can an O2 cause complete shutdown or just bad running and lastly where it he computer located on this 1986 300E

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles

does this year have the ability to use a code reader ? what type and where is the plug and lastly where can I get a list of codes ?

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles

The computer is located behind the battery and covered with a heavy black plastic flap. The computer or read out is read under the lip of the driver side front fender, and I think it is the one with the silver colored cable going into it. I don't know who can read it. A good indy shop perhaps. Maybe only the stealer.

__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

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