trouble code and high idle help...
Thread Starter
|
Junior User
Joined: Jan 2007
Posts: 99
Likes: 0
From: Rochester Wa
trouble code and high idle help...
ok guys i need your help again... well i ran the scanner thing on my 86 f-150 5.0 EFI because i wanted to see i could pull a code for why my truck on startup isnt high idleing ever.. so these are the codes i pulled.
code 12-RPM unable to reach upper test limits
code 13-RPM unable to reach lower test limits
code 25-Knock not sensed during dynamic test
code 41-No HEGO switching detected/ Hego sensor circuit indicates system lean
so if anybody can tell me what these codes mean would be great and also what could be the problem with the high idle if i didnt get a Throttle position sensor code? thanks a ton
code 12-RPM unable to reach upper test limits
code 13-RPM unable to reach lower test limits
code 25-Knock not sensed during dynamic test
code 41-No HEGO switching detected/ Hego sensor circuit indicates system lean
so if anybody can tell me what these codes mean would be great and also what could be the problem with the high idle if i didnt get a Throttle position sensor code? thanks a ton
Logistics Pro
Joined: Jan 2001
Posts: 3,789
Likes: 26
From: Connecticut
Code 12; RPM wrong during high idle self est. Check IAC solenoid operation for dirty throttle plates and Minimum idle speed.
Code 13; RPM was wrong during low idle self test, check for vacuum leaks, IAC operation and high minimum idle.
Code 25; Konck sensor not detected during WOT. Check operation by tapping on manifold while watching the signal voltage.
Code 41; Memory or Running test? Both have to do with O2 check for vac leaks too much PVC flow or Map showing low air flow.
Reamer
Code 13; RPM was wrong during low idle self test, check for vacuum leaks, IAC operation and high minimum idle.
Code 25; Konck sensor not detected during WOT. Check operation by tapping on manifold while watching the signal voltage.
Code 41; Memory or Running test? Both have to do with O2 check for vac leaks too much PVC flow or Map showing low air flow.
Reamer
Moderator
Joined: Jan 2001
Posts: 56,949
Likes: 2,718
From: Virginia
IAC is the idle air control. It's mounted to the throttle body. You need to take the throttle body apart and clean the blades and the passages with carb cleaner. Take the IAC off and clean it's passages in the throttle body.
Thread
Thread Starter
Forum
Replies
Last Post
IcallHerBeast
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
13
Apr 8, 2012 08:18 PM
SideWinder4.9l
1987 - 1996 F150 & Larger F-Series Trucks
7
Jul 30, 2011 08:29 PM
clark714x4
1987 - 1996 F150 & Larger F-Series Trucks
11
Oct 23, 2004 09:34 PM
fire23
1987 - 1996 F150 & Larger F-Series Trucks
2
Nov 26, 2001 08:14 PM
