Sudden misfire after restart - ZR-1 Net Registry Forums

tccrab · 08-20-2006

Took my oldest son out for a 20 mile or so ride in Girlfriend this afternoon.
Started and ran fine just like always.
Stopped by a buddy's house for 30 mins or so, then fired her up to go home. Started fine but as soon as I pulled out of the driveway it was obviously missing on at least 2 cylinders.
At idle you can hear the dual mass flywheel rattle.

Babied her home, seems to be ok at cruising speed, just low RPM's she's missing badly. On the way back home it seemed to run just a little hotter than usual, but never anywhere near the danger zone. After letting her cool off for about three beers I checked all the easy things, the hoses (map sensor hose first), spark plug wires, etc.
No luck there, everything seems OK.

Don't smell gas at the tailpipe so it's not mechanical.
Tomorrow I'll dig out the Helms books, get my tools out, pull the plugs and see if there's any wet ones, but I'll bet dollars to donuts that I won't find any that are soaking wet.
Girlfriend is a 1990 with 10,900 miles, engine is as original. Plug wires were changed by PO, and I'll give him a call tomorrow to see if he ever updated the fuel injectors or had to mess with the coil packs.

I remember a post here in the last few months which sounded very similar to my experience. I'm just too lazy to go dig it out right now.
Advice, anyone?

TomC
'90ZR1 #792
Crabs is online now

08-20-2006	#1
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,655	Sudden misfire after restart Took my oldest son out for a 20 mile or so ride in Girlfriend this afternoon. Started and ran fine just like always. Stopped by a buddy's house for 30 mins or so, then fired her up to go home. Started fine but as soon as I pulled out of the driveway it was obviously missing on at least 2 cylinders. At idle you can hear the dual mass flywheel rattle. Babied her home, seems to be ok at cruising speed, just low RPM's she's missing badly. On the way back home it seemed to run just a little hotter than usual, but never anywhere near the danger zone. After letting her cool off for about three beers I checked all the easy things, the hoses (map sensor hose first), spark plug wires, etc. No luck there, everything seems OK. Don't smell gas at the tailpipe so it's not mechanical. Tomorrow I'll dig out the Helms books, get my tools out, pull the plugs and see if there's any wet ones, but I'll bet dollars to donuts that I won't find any that are soaking wet. Girlfriend is a 1990 with 10,900 miles, engine is as original. Plug wires were changed by PO, and I'll give him a call tomorrow to see if he ever updated the fuel injectors or had to mess with the coil packs. I remember a post here in the last few months which sounded very similar to my experience. I'm just too lazy to go dig it out right now. Advice, anyone? TomC '90ZR1 #792 Crabs is online now __________________ TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B]