some kind of misfire thing happening.. help
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
old pcm as in stock 98 computer? nah.
its still functioning in the car, but the harness is all cut back that used to hook to the engine.
the accel box is sold long ago, and also had a separate engine harness.
my 'try me' bs3 box is on the way.
its still functioning in the car, but the harness is all cut back that used to hook to the engine.
the accel box is sold long ago, and also had a separate engine harness.
my 'try me' bs3 box is on the way.
did your back fire start when you installed you ls2? (you did switch to the aluminum block right?)
back pressure doesnt seem bad at all 1.3:1 on a 365 cubed engine and a T4 pt88 right.
back pressure doesnt seem bad at all 1.3:1 on a 365 cubed engine and a T4 pt88 right.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
thats right smokinhawk, i think its good backpressure too!
when the thing started acting up.. can't say exactly.. i was thinking i had a backpressure issue w/76mm / stock coils petering out / some valve float with the wheel iron block motor in a previous dyno session
http://www.fastrides.com/photos/mm/i.../original.aspx
so i put truck coils on and installed new plugs.. then i switched to the 88mm and it ran awesome at the last ls1 tech race... so i figured between the turbo change (lower backpressure), putting the truck coils on, and taking the slp muffler back off that it was fine again.
then well of course i blew it up that day and put the ls2 in a month later. same everything exept for cam sensor, timing cover, block, and stock cam instead of the biggish one that was in there.
when the thing started acting up.. can't say exactly.. i was thinking i had a backpressure issue w/76mm / stock coils petering out / some valve float with the wheel iron block motor in a previous dyno session
http://www.fastrides.com/photos/mm/i.../original.aspx
so i put truck coils on and installed new plugs.. then i switched to the 88mm and it ran awesome at the last ls1 tech race... so i figured between the turbo change (lower backpressure), putting the truck coils on, and taking the slp muffler back off that it was fine again.
then well of course i blew it up that day and put the ls2 in a month later. same everything exept for cam sensor, timing cover, block, and stock cam instead of the biggish one that was in there.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
Originally Posted by MIGHTYMOUSE
felt better today...... ill keep beating on it to make sure 
uhhhhDid you switch it out before last night? I meant to chat you up a bit more but you got away early!
Teching In
Joined: May 2004
Posts: 40
Likes: 0
Originally Posted by MIGHTYMOUSE
felt better today with the new box. ill keep beating on it to make sure
Already did the camsync-override stuff.
Whoops my buddy was logged on...this is LTLHOMER.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
i have no idea still, it has gone away significantly when i dropped the boost.. so maybe valvesprings since i changed everything else.
ill run into the problem again when i up the boost, havent been over 17 yet.. 11-17 seem ok. maybe 2mph down trap speed at 17psi but thats really hard to point blame.
ill run into the problem again when i up the boost, havent been over 17 yet.. 11-17 seem ok. maybe 2mph down trap speed at 17psi but thats really hard to point blame.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
i don't think it is taken care of, but it may just be me. the car runs good and is dependable, but is down about 3psi worth of hp since this ls2 was put in.
i am waiting for w2w to have time for me to drive the car up there and let them look everything over in person.
i am waiting for w2w to have time for me to drive the car up there and let them look everything over in person.