i need a little help
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 86
Likes: 0
From: Louisiana
i need a little help I just changed the headers on my 95 lt1 trans am. Pacesetter LT's painted. after install car misses and hesitates when accelerating. Car runs fine if i don't give it too much throttle. the heavier the load i put on it the worse it misses. I put it on the datalogger and it shows that it is dropping timing. it goes from around 30 to 40 to around 17 when i put it to the floor. Maybe O2's??? need a little help.
the main problem people have when installing long tubes is the spark plug wires getting burnt by the headers if it ran fine before you put the headers on i would go back over everything make sure all the plugs are tight spark plug wires in the right place and nothing is burnt
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 86
Likes: 0
From: Louisiana
already done. car has been looked over many times and i cannot find anything. it throws no codes and runs just fine through out the rpm range if i just let it wind out. if i lay on the gas a little it misses. if i go up a gear it misses even more. its kinda hard to explain. the more load i put on it the worse the hesitation gets. New Opti.
Trending Topics
I have heard of people having very bad knock retard when they switched to LT's. Some install a LT4 knock module because it is less sensitive.
Also o2's could be an issue. You have them connected with o2 extensions? You could try unplugging both o2's and driving it around for a while and see if anything changes.
Also o2's could be an issue. You have them connected with o2 extensions? You could try unplugging both o2's and driving it around for a while and see if anything changes.
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 want to say Wires , What kind are you running? I had this same issue, It pulled hard still but there was a mis , And more noticeable in higher gears My Coil was cracked and 2 plug wires were burnt
How do you have the wires routed, Did you run the car at night and check for any sparks jumping?
How do you have the wires routed, Did you run the car at night and check for any sparks jumping?
I'd suggest looking into the O2's also, did you buy extensions? Make you own?
I made my own the first go around and my car done the same thing, I bought new O2's and extensions and all was well.
I made my own the first go around and my car done the same thing, I bought new O2's and extensions and all was well.
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 86
Likes: 0
From: Louisiana
I've checked the wire routing and found nothing burnt or arcing. My O2's are pretty old. I've never changed them and have had my car for about 50,000 miles. I'm going to unplug the o2's and see if anything changes. I'll get back with yall. Thanx for the info.
