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cycling misfire 200 85

posted by  someone claiming to be Jason Goodley on  Sat Nov 7 20:00 CST 1998 [RELATED]

I have been trying to dianose and fix a misfire on my 85 244 DL. The miss has a definite cycle to it, the engine will miss then run smooth for a few seconds and miss again(the interval is always the same). At higher rpms the cycle is the same but the interval between the miss is shorter. And with the idle adjustment screw all the way in the idle speed will only go as low as 900 rpm.

HERE IS WHAT WAS REPLACED/DONE

Idle air motor

spark plugs

cracked vaccume lines

spark plug wires

injector seals

cap and rotor

throttle body was cleaned

throttle plate reset

What could cause this mysterious misfire??





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