Misfire Cyl #1: Need help.
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
Misfire Cyl #1: Need help.
Application is a 97 corvette with 108500 on the clock.
I felt rough idle and the Mechanic's scanner said i have a periodic misfire on cyl #1. I suspected a bad plug or spark plug connection and took it home to check (not wanting to pay for additional labor costs for somthing i could look at) The plug and connection were both normal.
Both plugs and wires were changed in April:
- NGK Tr-55 copper plugs
- GM performance SP wires
I suspected the fuel injectors might be clogged so i ran a bottle of Lucas fuel injector cleaner through the gas tank. I still have the misfire and now it's more frequent.
Questions:
a) does this sound like an injector problem
b) should I attempt to have the injectors cleaned or purchase new ones?
c) How difficult is an injector swap?
thanks.
I felt rough idle and the Mechanic's scanner said i have a periodic misfire on cyl #1. I suspected a bad plug or spark plug connection and took it home to check (not wanting to pay for additional labor costs for somthing i could look at) The plug and connection were both normal.
Both plugs and wires were changed in April:
- NGK Tr-55 copper plugs
- GM performance SP wires
I suspected the fuel injectors might be clogged so i ran a bottle of Lucas fuel injector cleaner through the gas tank. I still have the misfire and now it's more frequent.
Questions:
a) does this sound like an injector problem
b) should I attempt to have the injectors cleaned or purchase new ones?
c) How difficult is an injector swap?
thanks.
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Where the NGKs the screw on tip types? or the fixed? I had numerous problems with those plugs because the tip would loosen causing a bad relay/spark/whatever you want to call it.
Not sure if that will help, but maybe check that and it is possible that a plug where backout a little, that has happen to me too and this is caused by not ensuring they were snapped in place properly.
Not sure if that will help, but maybe check that and it is possible that a plug where backout a little, that has happen to me too and this is caused by not ensuring they were snapped in place properly.
Premium Supporting Vendor
Joined: Oct 2004
Posts: 36,838
Likes: 438
From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
Had a couple go out on my F-Bodies in the past. One failed slowly, started out missing and then it would be fine, off and on for a while.
The second one just quit...
Easy to test, as suggested above, just more it to another spot...
Good luck,
Peace
Chip
The second one just quit...
Easy to test, as suggested above, just more it to another spot...
Good luck,
Peace
Chip
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From: bolckow missouri
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
I don't have the scanner my mechanic has so i can't tell which cylinder is doing the missing. Does the Basic OBDII meter at auto zone haev this ability?
Also how much does a replacement coil cost these days?
Also how much does a replacement coil cost these days?
Instructor
Joined: Jan 2006
Posts: 246
Likes: 4
From: Denton County Texas
The longer you drive it the more damage you are causing to the catalytic converter. Unburned fuel and catalytic converters don't mix. I would pay to get it fixed or plan on buying a converter also...