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Old 03-03-2002, 09:58 AM
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Join Date: May 2001
Location: Grand Marais, Minnesota
Posts: 8
Question '72 280SE 4.5 Fuel problem

I am having a problem with my wife's 4.5. When I purchased it this past fall, it was not firing on cylinder's 4 and 8. I was told that this was most likely caused by the trigger points. I replaced them and still no fuel to those two cylinders. The car ran fine when parked six months before I bought it. Any idea's? The fuel control module? If so, where and how much? Spring is coming and we are anxious to get her on the road. Thanks for any help.
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Old 03-03-2002, 02:32 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The controller is behind the right side headlight.

You could have a controller problem but the circuit to the trigger points are still what I would look at first. An easy test of this is to have key on engine off and move the throttle by hand. The pair of injectors signaled by their pair of trigger points closed at the moment, will fire twenty times from idle to full throttle (the number of times it fires is not important for this discussion). Move the engine by hand while continuously moving the throttle. The injcetors clicking will move down the firing order in pairs. When you get to the pair that don't fire check out the circuit.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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