scanner codes? possible cures
04-09-2009, 05:44 PM
#1
1st Gear Member
Thread Starter
Join Date: Dec 2008
Location: FL
Posts: 52
scanner codes? possible cures
My 88 5.0 has been running rough with vibration. Ran the KOEO test.
Results= 23, 1, 31
KOEO reusults= 23, 41, 91, and 13.
Anyone with these in the past and could make some recommendations? Thanks...I want my Baby back running strong again.
Results= 23, 1, 31
KOEO reusults= 23, 41, 91, and 13.
Anyone with these in the past and could make some recommendations? Thanks...I want my Baby back running strong again.
04-09-2009, 06:01 PM
#3
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
23 - Throttle Position Sensor Out Of Self Test Range (O,M,R)
41/91 - system Indicates Lean -passenger/driver side(R)
13 - RPM Not Within Self Test Lower Limit (R), DC Motor Did Not Move (O,M,R), Idle Speed Control motor or Air Bypass not controlling idle properly -generally idle too high
Snafu'ed TPS and O2 sensors, vacuum leak causing 41/91 and/or 13... suggest to verify TPS voltage range, perform base idle reset and check for vacuum leaks. LUK
41/91 - system Indicates Lean -passenger/driver side(R)
13 - RPM Not Within Self Test Lower Limit (R), DC Motor Did Not Move (O,M,R), Idle Speed Control motor or Air Bypass not controlling idle properly -generally idle too high
Snafu'ed TPS and O2 sensors, vacuum leak causing 41/91 and/or 13... suggest to verify TPS voltage range, perform base idle reset and check for vacuum leaks. LUK
04-09-2009, 06:38 PM
#5
in limbo
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
Yea sounds like you did the tps just fine. As for vac leaks bet way is smoke machine, bit if don't have one, carb cleaner...alot LOL!!! Also make sure your o2's are seated all the way into the bung and you don't have a leak in the exhaust before the o2s. It can throw them off.
04-09-2009, 08:09 PM
#7
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
Setting the TPS to .9xxx vdc is a fallacy/myth... as long as it stays within .5 - 1.19 vdc closed throttle, no failure should be triggered. For the O2 sensors, either check how they work based on the test diagram posted below, or this bench test procedure video. LUK
04-09-2009, 08:16 PM
#8
in limbo
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
Yea Joel. I used that write up off sbftech when I had lean codes. Turns out though I just had really bad corrotion. Once that was cleaned everything was kosher. 
Last edited by FivePointOhh; 04-09-2009 at 08:18 PM.
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