AllOutPerformance
December 5th, 2009, 12:46 AM
Ok,i have a very odd setup,and the problem im having is a bank to bank difference in spark.
My setup is odd to say the least,but i think ive had this problem before i went to a carb.
Run down on my setup.2001 4x4 1/2 408 4l80e.
408 11 to 1 248 254 660 lift 110 lobe center.
It has a vic jr intake with a 950 bg carb on it.Im using the factory map sensor for the load to control spark and tranny tables.
Problem im having is my pass side bank has alot more lead then driver side.
When i log it timing is were ive set it,but i tried a nitrous pull and fuzzed all plugs on pass side,driver side looks PERFECT,the timing mark on the ground strap looked perfect,when i log it,it shows what im telling it to have,28 total on c16 on a 175 shot,very conserative tuneup.Even on the motor it felt a bit wierd but made pretty good power considering my drivetrain loss with 80e and 1ton t case and big tires,unlocked it made 485whp.But does act a bit wierd.
Ok that sthe run down on the setup,any ideas?like i said i think this problem has been there before the carb swap.i would always have wierd bank to bank fuel trims.this has been there since i did a 6.0 swap,then the 408 as a efi and smaller head and cam,then the carb setup.
Ive put new crank sensors in it along with a cam sensor.Im honestly at a stand still.
Thought about changing pcm and tracking the entire wire harness from coil packs to ecu.But if anyone has something let me know.Thanks
Thanks for anything you guys can give me info wise.
My setup is odd to say the least,but i think ive had this problem before i went to a carb.
Run down on my setup.2001 4x4 1/2 408 4l80e.
408 11 to 1 248 254 660 lift 110 lobe center.
It has a vic jr intake with a 950 bg carb on it.Im using the factory map sensor for the load to control spark and tranny tables.
Problem im having is my pass side bank has alot more lead then driver side.
When i log it timing is were ive set it,but i tried a nitrous pull and fuzzed all plugs on pass side,driver side looks PERFECT,the timing mark on the ground strap looked perfect,when i log it,it shows what im telling it to have,28 total on c16 on a 175 shot,very conserative tuneup.Even on the motor it felt a bit wierd but made pretty good power considering my drivetrain loss with 80e and 1ton t case and big tires,unlocked it made 485whp.But does act a bit wierd.
Ok that sthe run down on the setup,any ideas?like i said i think this problem has been there before the carb swap.i would always have wierd bank to bank fuel trims.this has been there since i did a 6.0 swap,then the 408 as a efi and smaller head and cam,then the carb setup.
Ive put new crank sensors in it along with a cam sensor.Im honestly at a stand still.
Thought about changing pcm and tracking the entire wire harness from coil packs to ecu.But if anyone has something let me know.Thanks
Thanks for anything you guys can give me info wise.