where does this go?
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
You should pull the codes to see what is making the light come on. Here are some instructions of how to do it yourself and definitions for the codes: EEC IV Self Test hookup . You can leave out the volt meter/test light that they refer to and just watch the check engine light instead.
Elder User
Joined: Aug 2012
Posts: 567
Likes: 2
Previous owners do the dumbest things dont they. 
Trending Topics
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
You should pull the codes to see what is making the light come on. Here are some instructions of how to do it yourself and definitions for the codes: EEC IV Self Test hookup . You can leave out the volt meter/test light that they refer to and just watch the check engine light instead.
X2......check the codes, they will most likely point you in the right direction.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
If the sensor isn't bad, Nope.
Map trucks have an "intake air temp sensor" and maf trucks have an "air intake temp sensor ". The name sounds similar, and the sensor is the same, but map has it in the intake, which yours should be, and maf trucks have it in the air box.
The sensor being hooked up (and good) it won't throw a code. It sampling above engine air temp, instead of intake air temp, will only make it run leaner/richer in certain conditions... If the sensor is good. If it's bad, then you'll get a code no matter where it's sitting.
Map trucks have an "intake air temp sensor" and maf trucks have an "air intake temp sensor ". The name sounds similar, and the sensor is the same, but map has it in the intake, which yours should be, and maf trucks have it in the air box.
The sensor being hooked up (and good) it won't throw a code. It sampling above engine air temp, instead of intake air temp, will only make it run leaner/richer in certain conditions... If the sensor is good. If it's bad, then you'll get a code no matter where it's sitting.
Thread Starter
|
New User
Joined: May 2014
Posts: 9
Likes: 0
The only code I get with running and off test is 41
41- Hego circuit indicates system lean, or No Hego switching detected.
There is no place for that sensor to go its blocked off, so this must be a replacement motor.
So far I have checked fuel pressure and checked the heater power for o2 sensor and replaced o2 sensor.
41- Hego circuit indicates system lean, or No Hego switching detected.
There is no place for that sensor to go its blocked off, so this must be a replacement motor.
So far I have checked fuel pressure and checked the heater power for o2 sensor and replaced o2 sensor.
Senior User
Joined: May 2011
Posts: 184
Likes: 0
From: Garden City
You might want to find a lower intake that has that boss drilled and tapped, or drill and tap the manifold you have. Either way, you will have to remove the manifold. Just be ready to drill and tap some bolt holes at the ends of the heads.
I just had to swap manifolds for this very reason, and had to go so far as to heli-coil the front two manifold bolt holes. That process took longer than the rest of the job.
You may be alright with the sensor loose in the engine bay, but the computer will be more accurate with it in it's proper place.
I just had to swap manifolds for this very reason, and had to go so far as to heli-coil the front two manifold bolt holes. That process took longer than the rest of the job.
You may be alright with the sensor loose in the engine bay, but the computer will be more accurate with it in it's proper place.
Thread
Thread Starter
Forum
Replies
Last Post
TheKirbyMan
1987 - 1996 F150 & Larger F-Series Trucks
2
Dec 25, 2017 05:17 AM
Kwattro
1987 - 1996 F150 & Larger F-Series Trucks
3
Jan 17, 2006 09:55 PM