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Shutter at Idle when in gear and warmed up 700 1992

posted by  eventoday on  Sun Oct 18 09:34 CST 2015
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Hi Everyone,

I have a 92 740 non turbo wagon. 113k miles with the Regina system.

Drives really good other than I have been getting a shutter when the car warms up and is idling at a stop light. It doesn't happen when I slow down only when at stop light in gear. It goes away if I put in neutral or park.

When I say shutter the car will shake for a split second as the rpms drop 100-200 and then goes back to normal. Kind of like when the fan or AC turns on. Those are not the causes though as they are not running when I experience this. It does this 3-8 times at stop lights depending on how long I am stopped. I cant tell if it is a misfire or potentially something to do with the charging system???

Other info : recently replaced just to be proactive
Fuel pump and radio suppression relay ( had the shutter before these were replaced )

No Codes

IF it is warm and the fan does turn on while at a stop light the car wont shutter at Idle.

Any ideas where to start?
thanks so much,

Jake





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