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#1072535 - 11/21/21 05:04 PM Idling high w/ computer  
Joined: Jun 2016
Posts: 58
Ranger413 Offline
Member
Ranger413  Offline
Member

Joined: Jun 2016
Posts: 58
South GA
New intake manifold gaskets, rebuilt carb.

Having trouble. . .

Set base timing with distributor 4 pin disconnected, idling at about 650 in park. All seems good there. Engine warm, off of high idle cam.

Plug computer back in and the idle sits at 1100 or so.

Help!


88 MCSS, T-Top Notch Back, Factory 305
#1072538 - 11/21/21 06:17 PM Re: Idling high w/ computer [Re: Ranger413]  
Joined: Jun 2016
Posts: 58
Ranger413 Offline
Member
Ranger413  Offline
Member

Joined: Jun 2016
Posts: 58
South GA
I might be close. Seems like the rebuilt carb is not exactly meshing up with the linkages, possibly. Had to turn the cruise linkage out a hair for a little play. I think I could also use a new throttle return sping. Runs great otherwise.


88 MCSS, T-Top Notch Back, Factory 305
#1072542 - 11/21/21 08:35 PM Re: Idling high w/ computer [Re: Ranger413]  
Joined: May 2007
Posts: 5,026
Buick Runner Offline
10+ Year
Buick Runner  Offline
10+ Year
Member

Joined: May 2007
Posts: 5,026
Dharma station 1 the Hydra
With the dist diconnected from the computer, it goes into limp mode with no timing advance and full rich command. Once the dist is reconnected the computer advances the timing which should increase the rpm. 650 rpm in park is low, 1k is more normal in park. In drive it should idle at 600 to 650. Idle in drive is lower than idle in park due to the load from being in gear. This is why idle adjustments are made in drive.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1072545 - 11/21/21 09:39 PM Re: Idling high w/ computer [Re: Ranger413]  
Joined: Jun 2016
Posts: 58
Ranger413 Offline
Member
Ranger413  Offline
Member

Joined: Jun 2016
Posts: 58
South GA
That makes much more sense to me. I think I'm about there.


88 MCSS, T-Top Notch Back, Factory 305

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