Slight misfire at idle and while free-reving slowly

[dinanm3atl]

Engine runs smooth as glass

At idle there is a slight misfire. It shakes the car a bit.

If you free rev and SLOWLY ease into the gas it will miss a bit. If you snap the throttle it is not there...

Any ideas?

[Mike@PureMS]

I'd start by checking your spark plugs. Make sure they're clean and gapped properly.

[dinanm3atl]

Thanks. Will do.

Proper gap on e30? Recommend brand/type of plugs?

[dinanm3atl]

bump

[T.Dot_E30]

Bosch Supers...check the manual for the gap spec or buy a bentley

[winstontj]

Bosch W8DLC or something. Not 100% sure but the owner's manual will tell you or Bentley($80)/Haynes($15)/Chilton($30) - BTW you get what you pay for in a manual just like a car

try plugs as suggested then look at your cap & rotor. where is your idle?

[dinanm3atl]

1,000 but it is high from some vacuum leaks I am still hunting down.

Cap and Rotor and wires are plugs are new.

Prolly wrong plugs and wrong gap.

[AndrewBird]

If you have vacuum leaks, this could be your problem right there. Fix the vacuum leaks and then move on if the problem still exists.

If you know something is wrong, fix it first rather then going and looking for problems.

[dinanm3atl]

I am not 100% certain. But it has to be Vacuum for the high idle.

The Throttle is fine, Checked the ICV and no issues there...