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Installed 703 injectors, idle is high

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Old 10-23-2010, 04:03 PM
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Default Installed 703 injectors, idle is high
is there an idle relearn or something that need to be done after the injector swap? I just did mine and it idles at about 12-1300 instead of 750 or so. I took it all back apart and checked o rings and seals, can't hear a vacuum leak..

96 cherokee, 4.0
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Old 10-23-2010, 04:28 PM
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Thats what it soulds like a vacuum leak. Take a can of brake clean while the motor is running shoot some around the O-rings and if the idle jumps or dies there's your leak. Maybe knocked a vacuum line of to. Just double triple check everything is in place.
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Old 10-23-2010, 06:07 PM
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Originally Posted by JeepingDan
Thats what it soulds like a vacuum leak. Take a can of brake clean while the motor is running shoot some around the O-rings and if the idle jumps or dies there's your leak. Maybe knocked a vacuum line of to. Just double triple check everything is in place.
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Old 10-23-2010, 06:55 PM
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Originally Posted by jakeyman_i_am
is there an idle relearn or something that need to be done after the injector swap? I just did mine and it idles at about 12-1300 instead of 750 or so. I took it all back apart and checked o rings and seals, can't hear a vacuum leak..

96 cherokee, 4.0
when you installed them did you reset the cpu by touching the positive and negative battery cables together when off the battery?
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Old 10-24-2010, 08:29 AM
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Originally Posted by BlackBetty01
when you installed them did you reset the cpu by touching the positive and negative battery cables together when off the battery?
Nope, sure didn't - I'll try all this thanks guys
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Old 10-24-2010, 09:23 AM
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Originally Posted by BlackBetty01
when you installed them did you reset the cpu by touching the positive and negative battery cables together when off the battery?
where did you learn that
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Old 10-24-2010, 09:32 AM
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Originally Posted by BlackBetty01
when you installed them did you reset the cpu by touching the positive and negative battery cables together when off the battery?
Originally Posted by freegdr
where did you learn that
tried it just now - didn't help. I have a check engine light now so maybe that will give me a hint.. Tried throttle body cleaner and brake clean to test for leaks, honestly I can't find one..
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Old 10-24-2010, 09:33 AM
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+ anyone know how to get the ses light to blink out codes? i'm looking for it but you might be faster
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Old 10-24-2010, 09:34 AM
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ok. got a scanner to see what the code is?
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Old 10-24-2010, 09:35 AM
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umm I know it's floating around the tech section somewear..
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Old 10-24-2010, 09:35 AM
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Originally Posted by JeepingDan
ok. got a scanner to see what the code is?
no.. isn't there an ignition or pedal dance you can do to make it blink them out?
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Old 10-24-2010, 09:40 AM
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got it.

http://jeep-xj.info/HowtoECUcodes.htm
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Old 10-24-2010, 09:45 AM
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the only one it blinked out that isn;t 12 or 55 (battery disconnected and end of codes) is 25:

25 Idle Air Control circuit (IAC) Check IAC sensor and wiring.
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Old 10-24-2010, 09:47 AM
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coincidence? it just goes bad at same time?
Yea check the wiring.
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Old 10-24-2010, 09:56 AM
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Originally Posted by JeepingDan
coincidence? it just goes bad at same time?
Yea check the wiring.
that little guy was just barely moved out.. snapped it in and I'
m all set thanks guys

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