new computer made things worse
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
new computer made things worse
Is there something I was suppose to do when I hooked up the new computer in my 95 F-150 302 auto.
I took the old one out and plugged in the new one the same way. I had the battery disconnected, was I suppose to do something else. Thanks
I took the old one out and plugged in the new one the same way. I had the battery disconnected, was I suppose to do something else. Thanks
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
Direct quote from my Chiltons manual for 87-96 pick ups when replacing or repairing the PCM:
If the battery cable(s) is disconnected for longer than 5 minutes, the adaptive fuel factor will be lost. After repair it will be necessary to drive the truck at least 10 miles to allow the processor to relearn the correct factors. The driving period should include steady-throttle open road driving if possible. During the drive, the vehicle may exhibit driveability symptoms not noticed before. These symptoms should clear as the PCM computes the correction factor. The PCM will also store Code 19 indicating loss of power to the controller.
If the battery cable(s) is disconnected for longer than 5 minutes, the adaptive fuel factor will be lost. After repair it will be necessary to drive the truck at least 10 miles to allow the processor to relearn the correct factors. The driving period should include steady-throttle open road driving if possible. During the drive, the vehicle may exhibit driveability symptoms not noticed before. These symptoms should clear as the PCM computes the correction factor. The PCM will also store Code 19 indicating loss of power to the controller.
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
Sorry, no change pulled codes on it. This what I got,
172= HEGO shows system always lean
33= EGR valve opening not detected ( new EGR and new EGR solenoid)
45=Thermactor air upstream during self- test
38 (could be 48 couldn't find 38)but 48 is Loss of IDM, leftside whatever an IDM is
53=TP circuit above max voltage
66-MAF sensor input below min voltage
32=EVP voltage below closed limit
Some of these codes I didn't get off the old computer and on the passenger side of the engine it alot hotter than the driver side and can still smell raw gas, so the cats may be getting to hot.
172= HEGO shows system always lean
33= EGR valve opening not detected ( new EGR and new EGR solenoid)
45=Thermactor air upstream during self- test
38 (could be 48 couldn't find 38)but 48 is Loss of IDM, leftside whatever an IDM is
53=TP circuit above max voltage
66-MAF sensor input below min voltage
32=EVP voltage below closed limit
Some of these codes I didn't get off the old computer and on the passenger side of the engine it alot hotter than the driver side and can still smell raw gas, so the cats may be getting to hot.
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
I've got an ODB-1 computer, and the one I got I just bought today was a reman. It is throwing 2 digit codes and 1 3-digit code.
Trending Topics
Lead Driver
Joined: Nov 2002
Posts: 9,558
Likes: 45
From: Concord, NC
That isn't possible. It will output either 2-digit codes or 3-digit codes, but never both from the same computer.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
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
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
Well I'm telling ya'll this has got me stumped and about broke trying to fix it, I've put about close to $600 in parts on it so far and nothing has changed. This including the new PCM, EGR valve, EGR solenoid, TPS sensor, coolant temp sensor, FPR, MSD Ign coil, IAC. I've taken off and cleaned the TB and removed gunk fromthe upper intake plenum and no change. And the bad part is I can't give up on it cause I need the vehicle and can't afford to go buy a new one. Sorry for the sob story, just frustrated about the whole thing. It's probably something so simple and stupid I'm missing it.
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
Hmm... MSD ignition coil? Are you running a stock engine? Do you have the other components to support an MSD ignition system such as plugs and wires? If not, then that could be the source of at least some of your problems. You can't have just one component of an advanced ignition system such as MSD without having them all. Well, I guess technically you can, but then you end up with problems.
The only thing I can suggest right now is that you either replace the ignition coil with a stock one or buy the rest of the components necessary for an msd system. At this point the coil is the cheapest option.
The only thing I can suggest right now is that you either replace the ignition coil with a stock one or buy the rest of the components necessary for an msd system. At this point the coil is the cheapest option.
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
It's not the big performance one that I got. It's just the one that goes to our trucks in the stock location. Besides I've was having this problem before the ign coil was replaced, I just thought the old one was no good judging from the tip of it was half gone. So upgraded a little bit to see if that would help, but it hasn't.
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
Fair enough... it's just been my experience that if you use one component of an advanced ignition system you should use them all. But then, this comes from installing these systems on cars instead of pick ups.
If they have an msd coil that works with stock Ford pick ups- great.
So here's my next question- you've replaced a lot of sensors already, what sensors HAVEN'T you replaced? You might start by checking those out- you'd be surprised how one incorrect reading off a sensor by the PCM can screw things up. If you don't have a service manual, let me know which sensors you want to check and I will look up the procedures for you.
BTW, to determine what type of computer you have [in case you aren't entirely sure] just count the number of pins in the connector. An EEC-IV comp uses a 60 pin connector and an EEC-V uses a 104 pin.
If they have an msd coil that works with stock Ford pick ups- great.
So here's my next question- you've replaced a lot of sensors already, what sensors HAVEN'T you replaced? You might start by checking those out- you'd be surprised how one incorrect reading off a sensor by the PCM can screw things up. If you don't have a service manual, let me know which sensors you want to check and I will look up the procedures for you.
BTW, to determine what type of computer you have [in case you aren't entirely sure] just count the number of pins in the connector. An EEC-IV comp uses a 60 pin connector and an EEC-V uses a 104 pin.
Thread Starter
|
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
I know for sure the TAD and TAB haven't been replaced yet(thanks EPNCSU2006), but how many more do I have other than the ones I posted so far. I've put so much on this truck I can't remember all the crap I've put on it, I'm losing track of all of it.