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white smoke 1800 1972

posted by  mjamgb on  Mon Sep 27 07:00 CST 2004
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last visit: Tue Sep 4 14:53 CST 2012
[RELATED]

If the ignition is working properly (always best to check first) then I'd start looking at items that affect your mixture setting, especially at idle. The TPS is the throttle position sensor. If it is not giving the proper signal when you snap the throttle closed, the computer won't know how much fuel to give the beasty.
If the fuel pressure is low (or high) it will mess up fuel delivery also as the computer expects a certain pressure for the injector open sequence. The high vaccum with the throttle closed could be causing an otherwise OK pressure regulator to screw up. Ditto for a plugged fuel filter but you should be sensing that under load instead of at idle. Pressure can be measured with a gauge plumbed into the line. Believe D-jet is low pressure but to be safe get a FI gauge instead of a carb-type gauge as it will still be much more than carbs use.
Best to get yerself a Bosch FI manual for trouble-shooting the bugger 'cause we can shoot "possibilities" at you all day long and still miss it.

Mike!






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