94 flareside nightmare
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94 flareside nightmare
so I purchased my third flareside truck this time last year and have had some growing pains, 1995 f-150 flareside ext. cab, 5.0l, e4od 4x4. I bought it bone stock with a 5.0l, I lifted it 6” and put 35” tires on it and swapped in a 5.8, and I’m sure that’s where a lot of my issues began, I bought a used 1994 5.8l MAF, and the computer that was in it. Upon installing it the truck went into limp mode showing “shift solenoid #2 fault and transmission over temp” so I put the stock computer back in and it worked okay but had to crank a long time to start took some time before the power was actually there after you hit the pedal. So I bought a rebuilt “heavy hauler” transmission and rebuilt both diffs and changed ring+pinion to 4.55. Went to try and put the proper computer back in and same problem, it’s also taken to overheating the diff and burning out my abs sensors. And the torque converter won’t lock up when it should. Any ideas guys cuz I’m starting to pull my hair out.
Lead Driver
Joined: May 2011
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welcome, you came to the right place...you'll need to provide a more concise breakdown of your issues (although i'll be forever happy that you didn't write a book, can't stand that)
your first post is an intro, now you need to isolate one symptom at a time and go through the motions for proper diagnostics. How did it run before the 5.8 swap? was your original engine MAF?
pull codes first
your first post is an intro, now you need to isolate one symptom at a time and go through the motions for proper diagnostics. How did it run before the 5.8 swap? was your original engine MAF?
pull codes first
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Just curious....are you sure the transmission in the truck is an E4OD? The 5L trucks also came with a 4R70W starting in 1994. It is a stretch and I would think the transmission would work even worse if it was a 4R70W with the 5.8L computer trying to run it.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Answers that question.
The 5L MAF computer should run that 5.8L engine with no issues. If the 5.8L was modded it could be a different story. As far as the 5.8L MAF PCM dumping codes that leads one to believe it has a problem either at the connector or internally. Have you opened either PCM and inspected for signs of leaking capacitors and/or burned components?
The 5L MAF computer should run that 5.8L engine with no issues. If the 5.8L was modded it could be a different story. As far as the 5.8L MAF PCM dumping codes that leads one to believe it has a problem either at the connector or internally. Have you opened either PCM and inspected for signs of leaking capacitors and/or burned components?
Fleet Mechanic
Joined: Mar 2014
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From: Saskatchewan Canada
Pretty sure 1994 5.8 will not be MAF.
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The 5.8 runs okay but it feels like off the start it’s not getting enough fuel, and if you lay on the pedal to pass or etc. And yes I checked both computers and got a reman one that is for a 5.8 maf/e4od. Still same codes. Checked and cleaned the connectors on the granny since I know they have a habit of getting coated in trans fluid. Still same codes
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The part I don’t understand is why I keep getting transmission codes with the different PCM and not the stock one. I’ve heard of them having wires corroded/broke and having those codes but if that was the case it should do it on both PCM’s
Fleet Owner
Joined: Oct 2005
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From: Kentucky
I believe officially the 5.8L trucks with automatics got MAF in 1995. Sometimes the Cali. emission trucks started a little early. Since the engine appears to be running fine with the 5.8L PCM it is in all likelihood a MAF computer.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
I would agree, that's why I think the issue is with the connector on the PCM. Or the PC board is compromised.
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Runs okay on the 5.0 pcm but definitely starts easier and more power faster on the 5.8pcm it’s the codes I don’t get, and I’m also thinking since the torque converter is electric controlled as well that’s why I’ve had issues with it, either that or a bad torque converter.
Fleet Owner
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From: Kentucky
TOT: Speed Density Pin 42 MAF Pin 49
SS1: Speed Density Pin 52 MAF Pin 51
SS2: Speed Density Pin 19 MAF Pin 52
TCC: Speed Density Pin 53 MAF Pin 53
CSS: Speed Density Pin 55 MAF Pin 55
EPC: Speed Density PIN 38 MAF Pin 38
If both computers are MAF then the pins and functions are the same. If both computers are Speed Density the pins and functions are the same. If one is Speed Density and the other is MAF....several differences related to transmission functions.