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strange idle problems

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strange idle problems - 1/28/2008 5:50:57 AM   
shaun dk

 

Posts: 7
Joined: 1/28/2008
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Hi all
i`m an aussie bloke living in denmark and i have a couple of problems which may or maynot be related .

my car is a 91 galant 2,0 efi sohc .


1) when cold the car starts and runs at 1500 rpm then slowly drops down to 900rpm if not driven, this seems fine .However if i start the car cold and try to drive off then push the clutch in the revs drop right down to around 500. then a couple of seconds later increase again to 1500 rpm .this is a pain in the ar## as there are 6 stoplights between home and the kids school.
the guy at the wreakers wants 100 notes for a throttle body with tps, ics and mps still attatached .I pulled the ics (stepper motor) out today the worm gear spins ok when the key is turned to on so i don`t think its that . any ideas ?

2) with motor warm the use of accessories cause the car to idle down from 900rpm to about 700 rpm ,what causes this ? ive just replaced the alternator but this has not helped .

could these problems be related  what do you think .
thanks a bunch Shaun

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RE: strange idle problems - 1/28/2008 7:13:13 AM   
RMUDBUGS

 

Posts: 312
Joined: 11/15/2006
Status: offline
Anytime you disconect the battery it resets the computer and it no longer adjust for the carbon biuld up on the Throttle Body.  Start by cleaning the Throttle Body.

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06 Raider XLS Lava Red V-8 2WD 4DR
-AEM Brute Force Intake
-Front Tow Hooks
-Spray in bed liner

(in reply to shaun dk)
Post #: 2
RE: strange idle problems - 1/28/2008 9:14:38 PM   
shaun dk

 

Posts: 7
Joined: 1/28/2008
Status: offline
tb is clean  and i have reset ecu but no joy
shaun

(in reply to RMUDBUGS)
Post #: 3
RE: strange idle problems - 1/29/2008 11:04:37 AM   
RMUDBUGS

 

Posts: 312
Joined: 11/15/2006
Status: offline
Probably the Idle Speed Control Motor then.

_____________________________

06 Raider XLS Lava Red V-8 2WD 4DR
-AEM Brute Force Intake
-Front Tow Hooks
-Spray in bed liner

(in reply to shaun dk)
Post #: 4
RE: strange idle problems - 2/21/2008 9:48:43 PM   
mxmikie


Posts: 228
Joined: 9/6/2005
Status: offline
put a new o-ring on the biss adjustment screw

(in reply to RMUDBUGS)
Post #: 5
RE: strange idle problems - 2/22/2008 12:54:06 PM   
ehsanabria

 

Posts: 11
Joined: 2/18/2008
Status: offline
what is the biss adjustment screw

(in reply to mxmikie)
Post #: 6
RE: strange idle problems - 2/23/2008 9:33:18 PM   
mxmikie


Posts: 228
Joined: 9/6/2005
Status: offline
biss is the air intake adjustment screw in the top left of the throttle body

(in reply to ehsanabria)
Post #: 7
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