83 320i 5 speed Need help on fuel pump/ignition questions - Bimmerfest - BMW Forums

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E21 (1975 - 1983)

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Old 03-25-2012, 11:57 PM
DavidCrevenston DavidCrevenston is offline
David Crevenston
Location: Alexandria,VA
Join Date: Feb 2010
Posts: 34
Mein Auto: 1983 320i 1.8 Manual
83 320i 5 speed Need help on fuel pump/ignition questions

Hello to all thanks for helping me out in my previous post 1st off. I have a 83 320i 5 speed and I have a difficult problem to pinpoint on what is causing this issue so again I turned to anyone on here who could help or has been through similar problems. I will try to describe what happens the best I can. When the car is HOT and while driving the car will bog down and conk out. Then it wonít start until it is cool again. Also note when the car bogs down it also wonít let me give the car fuel or accelerate when I push down the pedal. Itís as though the fuel pump is not working to give gas. Also note when this happens and I am trying to start the car and it wonít start when I put the key in the run position you can hear some clicking going on from what appears to be a mechanical fuel pump under the hood right behind where the fan is. I believe this model has 2 fuel pumps 1 in the tank and 1 mechanical I just described to you. Please help me out here as I am at a loss on what this could be. Here are my 3 ideas please indulge me as to which one is correct if any. 1 the mechanical fuel pump is going bad somehow (but why) 2 Perhaps a fuel pump relay switch or device is going bad when hot and 3 the (I think itís called the COIL) is going bad. That is what the 1 wire runs to from the distributor cap. Again itís only happening when the car is hot and you run it hard give it a lot of gas. Please advise me here as to what this could be as I am at a trouble spot. I know with all the knowledge on these forums someone out there must have had a similar problem/the same problem thanks for your help in advance.
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