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Hi everyone. I have a 99 with 133k miles on it. Runs and drives great, but will, at random, misfire for about 15-20 seconds. Then it goes right back to running fine.

I haven't been able to establish a pattern to it, seems pretty random. But when it does this it's always 2 and 3 that misfire. Again, it'll only misfire for 15-20 seconds then clears right up.

Have been plowing through all the other misfire threads, but curious if anyone has seen symptoms like this.

Thanks!
 

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Typically either fuel delivery or ignition related. Have you scanned the car for trouble codes; please post any trouble codes you find.

Common issues; are plugs, wires and coils. You might try spraying moisture on the coil, wires and see if that makes the misfires worse; the coil packs cracking, is a common issue with these. Also, how many miles on the car and when was the last time, the coil, plug wires and plugs were changed?

As for for fuel related issues; you might try doing a fuel pressure test and see if it is in spec. Dirty throttle bodies can cause drivability and idle problems; clean and align.
 
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