Very occasional misfire

AndyJacobs · 6th April 2018, 12:19

I seem to be frequenting this place more and more lately.

My ZT 190+ has started misfiring (I think). It happens about once a month or so. I do about 400 miles a week so we're talking very intermittent.

There doesn't seem to be a pattern. It went through the snow and temperatures of -6 without so much as a cough. But it happened before and it just happened again this morning. This morning, I was cruising along at about 60mph. Straight road, pretty flat, not too cold, dry, just filled up with Premium unleaded about 80 miles ago. All of a sudden, there's a loss of power like it's misfiring. Not complete loss of power, you can feel it and it gives that "Oh golly (Was a slightly naughty word but the forum changed it!), it's going to break down" feeling in the pit of your stomach. Dip the clutch, give the throttle a jab. All sounds good. Clutch out, still missing.

This took place over about 10 seconds and then the problem disappeared and I did another 20 miles or so to finish my journey without it happening again.

Spark plugs? Coil packs? Something more sinister?

Cheers
Andy

6th April 2018, 12:19	#1
AndyJacobs Regular poster MG ZT 190 Join Date: May 2013 Location: Andover Posts: 73 Thanks: 14 Thanked 5 Times in 4 Posts	Very occasional misfire I seem to be frequenting this place more and more lately. My ZT 190+ has started misfiring (I think). It happens about once a month or so. I do about 400 miles a week so we're talking very intermittent. There doesn't seem to be a pattern. It went through the snow and temperatures of -6 without so much as a cough. But it happened before and it just happened again this morning. This morning, I was cruising along at about 60mph. Straight road, pretty flat, not too cold, dry, just filled up with Premium unleaded about 80 miles ago. All of a sudden, there's a loss of power like it's misfiring. Not complete loss of power, you can feel it and it gives that "Oh golly (Was a slightly naughty word but the forum changed it!), it's going to break down" feeling in the pit of your stomach. Dip the clutch, give the throttle a jab. All sounds good. Clutch out, still missing. This took place over about 10 seconds and then the problem disappeared and I did another 20 miles or so to finish my journey without it happening again. Spark plugs? Coil packs? Something more sinister? Cheers Andy __________________ --- 2003 MG ZT 190 in Trophy Blue