car missing/stumbling above 6,500 rpms...
car missing/stumbling above 6,500 rpms... Any ideas?
Car seems to run strong up to 6,500 rpms. Then, there is a noticeable miss above that.
One of the plug wires seemed a little loose, so I ordered new wires. Not sure why it would only miss above 6,500 rpms with that though.
The miss does not show up on the logs. But again, it is very noticeable at the track.
Car seems to run strong up to 6,500 rpms. Then, there is a noticeable miss above that.
One of the plug wires seemed a little loose, so I ordered new wires. Not sure why it would only miss above 6,500 rpms with that though.
The miss does not show up on the logs. But again, it is very noticeable at the track.
Springs were tested and set for cam by a shop that only works on heads. Brand new heads and valve train from MAST Motorsports.
I have morel limited travel lifters and T & D adjustable rockers. Rocker preload set to specs given by T & D.
Top 3 suspects right now -
1 - Losing spark. Ordered new wires. The current wires are sloppy.
2 - Fuel. Need to check injuector duty cycle, fuel pressure.
3 - Valve float.
Will be too cool if simply changing the plug wires fixes it. But my record would indicate it won't be that easy!
I have morel limited travel lifters and T & D adjustable rockers. Rocker preload set to specs given by T & D.
Top 3 suspects right now -
1 - Losing spark. Ordered new wires. The current wires are sloppy.
2 - Fuel. Need to check injuector duty cycle, fuel pressure.
3 - Valve float.
Will be too cool if simply changing the plug wires fixes it. But my record would indicate it won't be that easy!
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Im still thinking valve float, how much do your valves weigh? T&D rockers are super heavy and casue vavle float with a valvetrain that isnt a good combination. Throw on your stock rockers, if you can, and see if it clears it up.
Won't be able to try the stock rockers, they won't work with the limited travel morels. Already tried that before spending the money on the T & D's.
Ok - went did a couple of pulls to check fuel. Didn't lose fuel pressure, held in the mid 50's.
I did notice though that the wideband shows it getting very rich when it starts missing. It drops from 12.8 down to 10.8 - 11.2 range.
