Mr. Luos

iTrader: (9)

red hot headers??

I noticed after running lightly for a couple minutes that my Kooks were starting to look red. I wasn't sure if this was normal...so I turned the car off.

Car is running quite rich....could that cause it?

SSPerformance

iTrader: (76)

when my lt1 car was runing lean it was doing that

Mr. Luos

iTrader: (9)

Well...if it is lean I am lost.

Acting like it is WAY too rich at idle and lower RPM's.

goober35

iTrader: (1)

Do you have cats.

GT Griller

iTrader: (8)

Yea i would think lean would make them hotter...kinda strange.

Mr. Luos

iTrader: (9)

nope, just pipe

goober35

iTrader: (1)

hmm.
Do you know how lean your car is running. A lean motor tends to run a lot hotter.

Mr. Luos

iTrader: (9)

The odd part is...seems to be acting like it is running rich.
When it idles I swear I am going to start crying.
Backfires at idle....not terrible, just a little popping. Tune is obviously off.
When driving...it hesitates badly under 3500. Over that is acts fine. But a local shop but a base tune on it for now.
When it hesitates...it has shot some fire out the rear.

Obviously not driving it much right now. I had just cleaned the MAF, replaced the O2's and wanted to see if it helped.

redtail2426

iTrader: (10)

its running way to lean,dont wait long to get it fixed.

P Mack

iTrader: (6)

Have you done any work involving the valvetrain lately?

Mr. Luos

iTrader: (9)

Tons.

Big cam, new heads, new motor.
What do you need to know??

P Mack

iTrader: (6)

Exhaust lifter preload. If you're holding the exhaust valves open that cause backfiring and red hot headers.

SAM98WS6

running rich causes that...unburned fuel in the pipes...then it ignites

Mr. Luos

iTrader: (9)

Too much?

I had read that the Morels with stock rockers were a 22 ft/pound install.

What about too much spark advance down low? What is too much as well?

P Mack

iTrader: (6)

22 ft lb is not a preload value, it's a torque for the bolts. Did you measure your preload? Too much spark advance would not cause your problems.

Mr. Luos

iTrader: (9)

I did not measure preload. I had read to install the rockers to 22 ft/pounds with the Morel lifters and they would be fine.


I do believe I may have found the problem though. Vacuum leak. Gonna fix it tomorrow.
I made a stupid mistake and forgot to replace the LS1 valley cover bolts with the ones provided from FAST. Hopefully the intake isn't cracked.....