Surging idle

Reply Subscribe

Thread Tools

Search this Thread

Jun 22, 2007 | 08:32 PM

SSPerformance

Thread Starter

8 Second Club

iTrader: (76)

Joined: Jun 2004

Posts: 2,902

Likes: 0

From: Goshen NY

Surging idle

got a HC ta im learing how to tune on its a 231/236 590 lift cam trying ot get it to idle i got it to idle at 750rpms but i got some surge when i hit the gas it goes up down up down then leves back out..... what do i need to change....im using ls1 edit....also when im in drive and coem to a stop its idles at 2k then comes down take a lit but tho....

Last edited by SSPerformance; Jun 23, 2007 at 01:07 PM.

Jun 22, 2007 | 08:40 PM

LS1curious

TECH Enthusiast

Joined: May 2007

Posts: 538

Likes: 0

Can you get to the idle adaptive constants ?

Jun 22, 2007 | 11:40 PM

BIRDONNOS

11 Second Club

iTrader: (3)

Joined: Feb 2004

Posts: 298

Likes: 0

From: memphis, tn

not sure about ls1edit but if you have a base running airflow table, i would increase those numbers alittle at a time, as i use hptuners, i log my desired running airflow vrs ect. and then plug those numbers into my base running airflow, to start off, then play with the best timing to get it to idle right without surging.

Jun 23, 2007 | 01:07 PM

SSPerformance

Thread Starter

8 Second Club

iTrader: (76)

Joined: Jun 2004

Posts: 2,902

Likes: 0

From: Goshen NY

anyone

Jun 23, 2007 | 03:39 PM

kenp

11 Second Club

iTrader: (9)

Joined: Nov 2004

Posts: 795

Likes: 2

From: Cincinnati Area

Well, there's a post on efilive.com by SSpdDmon that adresses modifications to tables to help correct surge. There's also a post recently where someone bumped timing in the lowest three rpm cells to 35*, 30*, and 25* respectively.

I'm new to all of this but I had a serious surging problem and stalling and flashing these table modifications all but eliminated my problems.

Jun 23, 2007 | 04:14 PM

SSpdDmon

TECH Addict

iTrader: (10)

Joined: Jun 2004

Posts: 2,918

Likes: 0

From: Commerce Twp, MI

Part of the problem is that cam will probably like to idle around 850rpm. 750 might just be too low. Check my thread out in the tutorial section of the EFILive forums and also the sticky at the top to see if you have the tables I manipulated - mainly the IAC adjuster tables.

Jun 23, 2007 | 04:59 PM

KRAZY K 2000 TA

11 Second Club

iTrader: (5)

Joined: Mar 2003

Posts: 805

Likes: 1

From: Stockton, NY

your idle is too low 900rpm is more like it, more duration makes the engine not like low rpms because it is not as efficent at that low of an rpm,i think anyways