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engine hunting g16b in sierra(x90)
https://auszookers.com/forum/viewtopic.php?f=5&t=19402
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Author:  bazook [ Wed Feb 23, 2011 7:57 am ]
Post subject:  engine hunting g16b in sierra(x90)

I have a x90 g16b in my sierra that once its warm it goes from 1000 rpm down to nearly staling then goes back up to 1000rpm and back down again...

Could this be the airflow meter doing this or is it something else, by the its running the standard computer.

Author:  royce [ Wed Feb 23, 2011 8:12 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

check engine light working but not on?

first step like always, check for air leaks, check the adjustment of the tps, clean the air flow meter with electrical clean

mine has done that before but its only ever been idle high when you take your foot off the throttle then drop to idle after a few seconds

also try unplugging the IAC, will tell if its the ecu upping the speed or something else

Author:  kenn [ Wed Feb 23, 2011 8:34 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

Check O2 sensor plug also..

Author:  bazook [ Wed Feb 23, 2011 8:46 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

iac was the first to come off might see if the engine light shows something

Author:  steak_knife [ Wed Feb 23, 2011 8:49 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

how many wire O2 is yours??

Author:  bazook [ Wed Feb 23, 2011 8:50 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

4 sir steaky

Author:  bazook [ Wed Feb 23, 2011 8:51 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

I think :oops:

Author:  steak_knife [ Wed Feb 23, 2011 9:01 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

Pull the code's, if any & we can go from there..

wish I had a tech 2 :roll: live data is friggin awesome..

Author:  stockman [ Wed Feb 23, 2011 9:29 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

Is there a 4 wire o2? Or 1 or 2?

Author:  Damo [ Wed Feb 23, 2011 12:13 pm ]
Post subject:  Re: engine hunting g16b in sierra(x90)

If it's an X-90 g16 it should be a 4 wire O2.

Author:  steak_knife [ Thu Feb 24, 2011 6:44 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

stockman wrote:
Is there a 4 wire o2? Or 1 or 2?


1 & 4, the 4 wire has a heater for cold start's..

1 has one wire... :wink:

Author:  losfer [ Thu Feb 24, 2011 7:14 am ]
Post subject:  Re: engine hunting g16b in sierra(x90)

forget the o2 sensor , do what royce said

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