I own the "Phoenix" - a 1993 Metro which I have posted repairs on here in the past.
Rebuilt a '93 Manual Transmission, Rebuilt the Engine, Cleaned out the Throttle Body, Repaired a bad Fuel pump,
repaired a front Wheel Bearing, replaced the head 2x - last time with SS Valves......can't remember all of it right now.
It was running GREAT until this Winter when it started this random missing which is now getting worse.
Happening more often - yet it can go for an hour w/o missing ? DRIVES ME CRAZY !
NOW, my Metro is exhibiting intermittent engine "Missing" and I cannot figure out what is happening.
Usually happens while driving (not at idle) and happens irregularly.
The engine bucks and I lose power for perhaps a half second to a second.
Like the spark is gone for that long. Maybe the fuel ?
Pretty sure it is electrical. When it happens it turns my after market Cruise Control turns off - but the memory is kept....
I have replaced my Spark Plugs, the wires, the Distributor Rotor and the Cap.
Replaced the Fuel Filter, also. Still does it.
I have put TWO very solid Ground Wires from the Block to the Frame.
Seemed OK then, but now it has come back with a vengeance !
It can go 30 miles to work w/o any missing, then on the way home bucks like crazy.
Up hill, down hill, accelerating or decelerating - random !
The rpms on the Tachometer can be anything.
I thought bums (rough road) made it worse, but no - it does it any old time.
I have to Sherlock Holmes this out !
Maybe the Throttle Position sensor ? Have to look at the Computer readout with a fuse in the Diagnostic socket yet.
Could the Fuel Pump (New 4 years ago) have crud blocking that small screen.
But then it should kill the engine outright until I stop....????
It could be a loose or broken wire, but not ALL the wires would cause that missing.
If it were the Spark Coil, why would it be intermittent and not just fail ?!
Would a failing Alternator do that ?
If it is a short - it does not blow any fuses.
Does anyone have a clue about this or has had this Goofy Problem happen before ? !
DoctorBill