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Slight miss at idle?
Topic Started: Aug 19 2012, 11:54 AM (455 Views)
MarkyMayhem


Hello again! I just got my 1995 4/3 on the road [167,XXX miles] and she's running great, except for a bit of a miss at idle.

It's sort of like it idles fine for say 4 seconds, then misses for half a second, then fine for 4 seconds then miss for half a second, ALMOST an exact pattern.

When it misses, the engine shudders a tiny amount, so sitting in the car at idle, it's dead smooth but every 5 seconds or so there is a little vibration.

It's worse when it's cold, sometimes it's almost un-noticable when the car is warmed up.

Running the AC seems to almost eliminate the issue, I assume because of a faster idle

Car had new plugs, cap, rotor and wires 2 months before I got it [fact, I know the guy I got it from and helped put the stuff on]

I recently did the WP and had to redo the timing belt install 3 times cuz I kept getting a tooth off.
I THINK it was idling fine beforehand but I can't be sure, I only drove it 20 miles before the WP seized up on me. the TB is on correctly now, it runs great plenty of power etc.

I had pulled the #1 plug when I was getting the timing marks lined up, it did look kinda black, but not really to bad.

Right now I am leaning towards ignition timing, or bad plugs.. I'll check the plugs today, anything
I can do about ignition timing without a timing light? Any other suggestions?
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