concern about my header install

Reply Subscribe

Thread Tools

Search this Thread

Apr 10, 2007 | 09:20 PM

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

concern about my header install

yea i just put on some lt headers on and started it with open headers and when i first started it the rpm gauge was bouncing up between 1000 and 2000 i shut it off and then it just stayed at about 1000 and was going down when it was warming up. would that be normal for the first time it started up or whats the problem

Apr 10, 2007 | 09:53 PM

273sunsetZ

10 Second Club

Joined: Aug 2005

Posts: 567

Likes: 0

From: Tennessee Tech

I've never heard of anyone having that problem, did it throw a code?

Apr 10, 2007 | 10:12 PM

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

nope no code. now i did replace all the spark plugs to. could it be maybe a plug is a little loose?

Apr 10, 2007 | 10:26 PM

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

any one got a idea?

Apr 10, 2007 | 10:33 PM

273sunsetZ

10 Second Club

Joined: Aug 2005

Posts: 567

Likes: 0

From: Tennessee Tech

Quote:

Originally Posted by fuseone

nope no code. now i did replace all the spark plugs to. could it be maybe a plug is a little loose?

I wouldn't think so, I don't know why it would have idled higher if that was the case. Did you gap the plugs? Mabie check for vaccume hoses and make sure one didn't get pulled off or got a hole or something. When i got my car a vaccume hose that hooked up to the egr system got a hole in it and pinched shut, this caused the car to idle crazy..

Apr 10, 2007 | 10:44 PM

litle88

12 Second Club

iTrader: (20)

Joined: Jan 2007

Posts: 2,561

Likes: 4

From: Burbank, Illinois

I believe because there is no back pressure! and your PCM is adjusting!

Apr 10, 2007 | 10:56 PM

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

yea litle i thougth that to because when i started it up a second time it seemed to be fine.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

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

Apr 10, 2007 | 11:04 PM

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

yea all the bolts and stuff are tight what gets me is it runs ok now.

Apr 10, 2007 | 11:06 PM

#10

bww3588

12 Second Club

iTrader: (49)

Joined: Sep 2005

Posts: 8,139

Likes: 10

From: Chillicothe/Lima, Ohio

Quote:

Originally Posted by fuseone

yea all the bolts and stuff are tight what gets me is it runs ok now.

just the PCM searching for stuff. did you unhook your battery? my battery went dead this winter and after i got a new one it idled around 3k and ran like ****, as soon as i turned it off and back on it ran fine.

however, when i did my header install, i took the battery out completly, and put it back in after i was done and it started up just fine.

Apr 10, 2007 | 11:07 PM

#11

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

yea i took the negitvie termanal off when i was doing the work on the car

Apr 10, 2007 | 11:08 PM

#12

fuseone

Thread Starter

TECH Fanatic

Joined: Jan 2006

Posts: 1,050

Likes: 0

From: reading,pa

but the batter been disconnected for like 3 days

Apr 10, 2007 | 11:08 PM

#13

bww3588

12 Second Club

iTrader: (49)

Joined: Sep 2005

Posts: 8,139

Likes: 10

From: Chillicothe/Lima, Ohio

Quote:

Originally Posted by fuseone

yea i took the negitvie termanal off when i was doing the work on the car

thats why, the PCM was just hunting for a tune.

but it had nothign to do with backpressure. the PCM doesnt monitor that.

Apr 10, 2007 | 11:10 PM

#14

bww3588

12 Second Club

iTrader: (49)

Joined: Sep 2005

Posts: 8,139

Likes: 10

From: Chillicothe/Lima, Ohio

Quote:

Originally Posted by fuseone

but the batter been disconnected for like 3 days

that could be why.......

when my battery went dead, i tried to start it. but when my headers were going on, i didnt try to start it untill it was hooked back up. so my guess is the PCM on mine didnt notice the battery was gone because i didnt try to start it. on yours it went so long without power it probably reset itself. im sure it has capacitors in it that eventully go dead.