Idle control unit ??

[91expl-sport]

Hello,

Today I changed the idle control unit after the idle jumped form 900 to 2000 while i was at a stop light, also while parking, shut the truck off and on seem ok... Now that i replace the Idle control unit and re-set computer the truck idles at 500 to 600 rpm's. The truck used to idle at about 850 to 800 rpm. now lights blink, voltage meter jumps. I changed the ICU first, altinator second because the bearing were making a loud noise and pully was shaky.

***** Does the idle on the trottle body needs to be adjusted? *********

91 Explorer Sport 4.0 V6 EFI
K&N FIPK
BBK 66MM THROTTLEBODY
BORLA HEADERS
FLOWMASTER 40 AND 2 1/4 CUSTOM PIPES
180 JET THEMOSTAT
UNI TRACKTION BARS
Wind Jammer
Lund Sunvisor
Smithblit front bumper
SUPERCHIP

 

[91expl-sport]

Well it looks like Auto Zone gave me a bad idle control unit. A pal of mine gave a ICU and idle ok but after using the Air condition idle back to 2200 rpm's. Its looks like it could be the MAS or the throttle position sensor. Any idea's.....

 

[91expl-sport]

Ok it was the throttle position sensor.


THX

91 Explorer Sport 4.0 V6 EFI
K&N FIPK
BBK 66MM THROTTLEBODY
BORLA HEADERS
FLOWMASTER 40 AND 2 1/4 CUSTOM PIPES
180 JET THEMOSTAT
UNI TRACKTION BARS
Wind Jammer
Lund Sunvisor
Smithblit front bumper
SUPERCHIP

 

[ntrpriz]

Mine has always idled at 600 RMP. It will be higher before it warms up, and it does jump when I tun on the air, but 600 seems correct to me. No lights or volt meters jump either.

THanks