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1986 300e fuel pressure system issues
11-28-2008, 05:10 PM
Post: #1
1986 300e fuel pressure system issues
Does anyone have some good advise or a step by step check to isolate a fuel problem for a 1986 300e. 3.0 ltr 6 cyl. It certainly acts like fuel pressure issue.
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11-28-2008, 08:26 PM
Post: #2
RE: 1986 300e fuel pressure system issues
If it walks like a duck and quacks like a duck then why not check the fuel pressure first?
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12-01-2008, 12:42 AM
Post: #3
RE: 1986 300e fuel pressure system issues
Check fuel pressure.

Cary Joe York
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12-12-2008, 04:36 PM
Post: #4
RE: 1986 300e fuel pressure system issues
dpelman Wrote:Does anyone have some good advise or a step by step check to isolate a fuel problem for a 1986 300e. 3.0 ltr 6 cyl. It certainly acts like fuel pressure issue.

Thanks for the advise. I have the right pressure. It was not a pressure problem. I am sure had I taken the car to a Mercedes mechanic they would have found the problem using diagnostics. The problem turned out to be the ECU by process of elimination. All in all I replace the following in order. Idle control valve. $40, Oxygen Sensor $90, Fuel pump and filter, $110 dollars, and finally the ECU, $60. While this seems excessive $200 total, I just bought the car so I learned alot. I am going to have to replace the gas tank. It was crushed and it acts like it is out of fuel when the tank is half full.
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12-13-2008, 12:18 AM
Post: #5
RE: 1986 300e fuel pressure system issues
Thats great. Sorry we could not be of more help.

Cary Joe York
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08-19-2010, 06:33 AM
Post: #6
RE: 1986 300e fuel pressure system issues
For Mercedes Benz diagnotic tools, just check: http://www.x431.us/category.php?id_category=16
there will be more suprise and really good thing than you can think.
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