HELP! Detonation in only one cylinder!
#1
Newbie
Thread Starter
iTrader: (1)
Join Date: Dec 2006
Location: Panama City, FL
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
HELP! Detonation in only one cylinder!
I need help guys as to the cause of this. Here's the story:
Drove to vegas and on the way back (about a 3 hour drive) I got about half way and noticed a sputtering at the top of fifth and fourth on the highway when I was on the gas hard and in boost. Got home parked the car let her cool down. Went to move her and she was idling rough! Real rough. I pulled the plugs and the #1 cylinder (the cylinder closest to the throttle body) plug [the ground part] was practically gone and melted. Pulled the rest and nothing. Swapped out the plugs gapped them at .024 and went for a test drive. First Second Third runs near a wall listening and for detonation. Got onto the highway and all was good. Then Rolled into it in fifth and BAM detonation again. I'm talking hardcore misfiring. Get off the highway and once again every gear in boost detonation. Pulled the plugs and the #1 plug is again toast after only 10 miles at most.
Pleas help my baby is sick.
Cliff notes:
1.5 hours into 3 hour trip notice detonation top of fourth and fifth on highway
Pull plugs at home #1 cylinder plug melted
Change plugs
10 miles into test drive detonation again
Pull plugs; #1 is melted again
All other plugs are fine
HELP MY BABY IS SICK!
Drove to vegas and on the way back (about a 3 hour drive) I got about half way and noticed a sputtering at the top of fifth and fourth on the highway when I was on the gas hard and in boost. Got home parked the car let her cool down. Went to move her and she was idling rough! Real rough. I pulled the plugs and the #1 cylinder (the cylinder closest to the throttle body) plug [the ground part] was practically gone and melted. Pulled the rest and nothing. Swapped out the plugs gapped them at .024 and went for a test drive. First Second Third runs near a wall listening and for detonation. Got onto the highway and all was good. Then Rolled into it in fifth and BAM detonation again. I'm talking hardcore misfiring. Get off the highway and once again every gear in boost detonation. Pulled the plugs and the #1 plug is again toast after only 10 miles at most.
Pleas help my baby is sick.
Cliff notes:
1.5 hours into 3 hour trip notice detonation top of fourth and fifth on highway
Pull plugs at home #1 cylinder plug melted
Change plugs
10 miles into test drive detonation again
Pull plugs; #1 is melted again
All other plugs are fine
HELP MY BABY IS SICK!
#2
Evolved Member
iTrader: (16)
Join Date: May 2006
Location: Maine W/NJ Tags! FTP!!!
Posts: 1,229
Likes: 0
Received 0 Likes
on
0 Posts
Your hitting higher loads and probably running an unsafe boost level for octane/boost level. What did you hit for psi on the high gear pulls?
* Cylinder closes to the throttle body is cylinder #4 FYI *
* Cylinder closes to the throttle body is cylinder #4 FYI *
#5
Evolved Member
iTrader: (23)
Join Date: Jun 2004
Location: Wisconsin
Posts: 1,503
Likes: 0
Received 0 Likes
on
0 Posts
If you're melting the plug you may have a problem with your injector causing that cylinder to run lean. After melting 2 spark plugs you've probably done some permanent damage to that cylinder. I would do a compression test to see where things stand.
#6
Evolved Member
iTrader: (14)
Join Date: Aug 2005
Location: Socal :)
Posts: 2,636
Likes: 0
Received 0 Likes
on
0 Posts
What are your AFRs? What boost levels? Can you send a log?
My guess is you are running too lean in that cylinder and it may be as simple as a fouled injector combined with a lean tune (no safety margin)....Just a guess without data...
My guess is you are running too lean in that cylinder and it may be as simple as a fouled injector combined with a lean tune (no safety margin)....Just a guess without data...
Thread
Thread Starter
Forum
Replies
Last Post
Mellon Racing
Evo Engine / Turbo / Drivetrain
194
Apr 12, 2012 04:45 PM
metaphysical
Evo Engine / Turbo / Drivetrain
109
Aug 4, 2004 08:42 AM