help!!
help!! o.k i got my car done. started 1st twist of the key. runs like crap....
the car is
was stock 98 SS with headers, cat back,lid. no tune,cam,ect
what she got
tea 1.5 5.3 heads
220 @.050 cam
lsx intake and 90mm tb
ls6 maf meter
asp underdrive pulley
scorpin roller rockers
new hd stock length push rods
ls6 ported oil pump
(note: the heads/cam/rockers were used. made 420 to the tire on a vette)
problems
idles at 2400. sprayed carb clean around intake & tb. made no difference.
if you force the idle down past 1600, motor stalls.
runs like the timing is off....
no throttle response to speak of.
i tripple checked all connections, everything is fine that i can tell.
i followed the lsx instructions for all of this.
i eliminated the smog pump and plumming
had to change over to 99 up style valve covers and pcv tubing (modifed)
i am open to any ideas at this point......
9000 mile 98 SS camaro, worlds largest paper weight
the car is
was stock 98 SS with headers, cat back,lid. no tune,cam,ect
what she got
tea 1.5 5.3 heads
220 @.050 cam
lsx intake and 90mm tb
ls6 maf meter
asp underdrive pulley
scorpin roller rockers
new hd stock length push rods
ls6 ported oil pump
(note: the heads/cam/rockers were used. made 420 to the tire on a vette)
problems
idles at 2400. sprayed carb clean around intake & tb. made no difference.
if you force the idle down past 1600, motor stalls.
runs like the timing is off....
no throttle response to speak of.
i tripple checked all connections, everything is fine that i can tell.
i followed the lsx instructions for all of this.
i eliminated the smog pump and plumming
had to change over to 99 up style valve covers and pcv tubing (modifed)
i am open to any ideas at this point......
9000 mile 98 SS camaro, worlds largest paper weight
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Well, you changed heads/cam/intake/MAF so I wouldn't expect the stock tune to be able to handle it. Have a competent tuner work their magic and see what happens. 
I am curious as to why it idles at 2400, that doesn't sound normal. How do you force the idle down to 1,600?
I am curious as to why it idles at 2400, that doesn't sound normal. How do you force the idle down to 1,600?
Originally Posted by blkZ28spt
Well, you changed heads/cam/intake/MAF so I wouldn't expect the stock tune to be able to handle it. Have a competent tuner work their magic and see what happens.
I am curious as to why it idles at 2400, that doesn't sound normal. How do you force the idle down to 1,600?
I am curious as to why it idles at 2400, that doesn't sound normal. How do you force the idle down to 1,600?
the 2400 idle is a mystery. i was guessing a vacume leak but, nothing i did helped.....
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
I think something is wrong if you can close the throttle body blade, at idle, by pushing on it. Shouldn't it be all the way down against the idle set screw?
I'll check mine when i go out later, but I don't think that is right.
I'll check mine when i go out later, but I don't think that is right.
Trending Topics
Originally Posted by TAQuickness
you definately need a tune, but the 2400 rpm idle is a bit strange. I would have guessed it would stall out.
until you can get a tune, i'd put the stock MAF back in.
until you can get a tune, i'd put the stock MAF back in.
i totaly understand this needs to be tuned but, i can't even drive it!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
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 I figured out the "fast" idle problem. the lsx intake moves the throttle cable slightly farther away than stock. i'm still playing with that to get it perfect. however.
current observations.
car won't idle when cold, idles like crap when hot.(needs massive tuning?)
has fantastic throttle response(surprised with the tuning issues)
car is louder like, i cut the mufflers off.. doesn't appear to have any leaks (same exhaust as before)
also, the car gets hot fast. after 3 minutes idling, it's at 230ish(both fans on)
tuning again? this must be leaner than hell.....
current observations.
car won't idle when cold, idles like crap when hot.(needs massive tuning?)
has fantastic throttle response(surprised with the tuning issues)
car is louder like, i cut the mufflers off.. doesn't appear to have any leaks (same exhaust as before)
also, the car gets hot fast. after 3 minutes idling, it's at 230ish(both fans on)
tuning again? this must be leaner than hell.....