Ecu Compatability??
Thread Starter
|
New User
Joined: Nov 2007
Posts: 12
Likes: 0
Ecu Compatability??
I have been trying to find out if a computer from an 86 f150 will work with an 89 150. Both trucks have the 300 six
86 PART NUMBER-E7TF-12A650-LC
89 PART NUMBER-E8TF-12A650-Y2B
THANKS IN ADVANCE TO ALL, KIRK W.
86 PART NUMBER-E7TF-12A650-LC
89 PART NUMBER-E8TF-12A650-Y2B
THANKS IN ADVANCE TO ALL, KIRK W.
Last edited by kirkweston; Nov 15, 2007 at 12:02 AM.
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
86's have feedback carbs, so NO it won't run your EFI 89. But the "E7TF" number has me thinking it's not from an 86... Do you think your 89 computer is bad?
You should be able to run almost any EFI 300 computer, as long as it's bank fire, speed density.
I'm running a 95 351w E4OD computer temporarily in my 79 F-150. It's got an 88 302 EFI and a C4. Amazingly no CEL with the missing electronic tranny!
You should be able to run almost any EFI 300 computer, as long as it's bank fire, speed density.
I'm running a 95 351w E4OD computer temporarily in my 79 F-150. It's got an 88 302 EFI and a C4. Amazingly no CEL with the missing electronic tranny!
Posting Guru
Joined: Jun 2002
Posts: 2,091
Likes: 3
From: Suffolk, VA USA
I just had to buy a new computer for my 86 F150 5.0 EFI. The one thing I took away from every parts guy I spoke with is the the 86 computers were specific to that year...won't work in another year...another year won't work in an 86.
Thread Starter
|
New User
Joined: Nov 2007
Posts: 12
Likes: 0
bought a used computer
I bought a used competer from ebay.
Yes, I was told by a mechanic that did me a favor and came to my garage, he said the voltage output to the injectors was very low. He stated he was 85 percent sure it was from a bad computer.
I am still not so sure myself but this guy is certified and has many years of experience, so I keep my fingers crossed.
The truck was sitting for a while before I purchased it.
I checked the fuel pumps...all good.
The mechanic strobed 12 volts into the unit and got it to run...but really poorly. idles ok...bogs temporarily under load...and a good amount of black smoke.
The computer I bought...E7TF-12A650-LC
I still am not sure. but one answered...the center numbers represent the programming codes so I should be good to go.
Yes, I was told by a mechanic that did me a favor and came to my garage, he said the voltage output to the injectors was very low. He stated he was 85 percent sure it was from a bad computer.
I am still not so sure myself but this guy is certified and has many years of experience, so I keep my fingers crossed.
The truck was sitting for a while before I purchased it.
I checked the fuel pumps...all good.
The mechanic strobed 12 volts into the unit and got it to run...but really poorly. idles ok...bogs temporarily under load...and a good amount of black smoke.
The computer I bought...E7TF-12A650-LC
I still am not sure. but one answered...the center numbers represent the programming codes so I should be good to go.
Trending Topics
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
The computer doesn't control the positive side of the injectors, only the ground. They should be getting 12v with the key on. On your 89 they should be powered by the EEC power relay.
As for the part number, the center number simply means "computer, ECM, PCM, whatever". Every Ford computer I've seen, from my old carburetued 86, to brand new ones in the '00s, have this center number. The first part of the number indicates the revision year and model. The last part indicates the specific version of the part.
But...I've installed many new parts straight from Ford that have newer or different part numbers, so I wouldn't go by this alone.
As for the part number, the center number simply means "computer, ECM, PCM, whatever". Every Ford computer I've seen, from my old carburetued 86, to brand new ones in the '00s, have this center number. The first part of the number indicates the revision year and model. The last part indicates the specific version of the part.
But...I've installed many new parts straight from Ford that have newer or different part numbers, so I wouldn't go by this alone.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Originally Posted by kirkweston
Yes, I was told by a mechanic that did me a favor and came to my garage, he said the voltage output to the injectors was very low. He stated he was 85 percent sure it was from a bad computer.
Also I think your mechanic needs to get another profession or go back to school, as he does not know the fuel injection system used on Fords.
/
Last edited by subford; Nov 16, 2007 at 08:19 AM.
Thread Starter
|
New User
Joined: Nov 2007
Posts: 12
Likes: 0
still trying...working out the bugs...injector relay?
I did a lot of reading and take everyones input with more interest and appreciation every day.
Today, checked the grounds to the computer...all solid
My friend referred his mechanic to due his evaluation but I am doubting his word based upoin everyones real life input from here with fords.
I talked to the gentleman I bought the computer from and he said it was from a fuel injected truck so compatability should not be an issue.
If the injectors are getting weak voltage...would that be a possible relay issue?
I love this place...and love my fords. thanks again to all...can't wait to solve the dilemma and get her running again.
Today, checked the grounds to the computer...all solid
My friend referred his mechanic to due his evaluation but I am doubting his word based upoin everyones real life input from here with fords.
I talked to the gentleman I bought the computer from and he said it was from a fuel injected truck so compatability should not be an issue.
If the injectors are getting weak voltage...would that be a possible relay issue?
I love this place...and love my fords. thanks again to all...can't wait to solve the dilemma and get her running again.
Elder User
Joined: Jun 2006
Posts: 805
Likes: 3
You check the TPS? If the TPS is shorted, i.e. sending 5 volts back to the ECM, the ECM will think the throttle is at WOT. During start, the ECM will not fire the injectors if WOT is detected. I'm not sure if the intent here was to alleviate flooding, or to provide a diagnostic test for the injectors to see if they're leaking.
I won't say it is the TPS, but I do know my '92 will not start if I hold the throttle on the floor. One of those "whodathunkit's"
I won't say it is the TPS, but I do know my '92 will not start if I hold the throttle on the floor. One of those "whodathunkit's"
Thread Starter
|
New User
Joined: Nov 2007
Posts: 12
Likes: 0
have spark...will check the tps for varying voltage today.
I have spark...if you shoot fluid in the plenum it will run and then die.
I willl check the tps for varying voltage today.
I think it is supposed to go from zero to around five volts.
As said earlier...original owner said he drove it fine ...then parked it...sat for a bit...and problem arose, but I love the truck...refuse to give up and this site is the best ever for help and knowledge base in my opinion. Your all being a great help to me.
I willl check the tps for varying voltage today.
I think it is supposed to go from zero to around five volts.
As said earlier...original owner said he drove it fine ...then parked it...sat for a bit...and problem arose, but I love the truck...refuse to give up and this site is the best ever for help and knowledge base in my opinion. Your all being a great help to me.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Take a long screwdriver and put the end on an injector and the other end to your ear.
Have someone crank the engine and see if you hear a clicking sound.
Injectors are very noisy and if you do not hear them check the small black wire with a green stripe that goes to the negative post of the battery.
/
Have someone crank the engine and see if you hear a clicking sound.
Injectors are very noisy and if you do not hear them check the small black wire with a green stripe that goes to the negative post of the battery.
/