94 flareside nightmare
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So I should verify wether it’s actully speed density or MAF. I was told by the yard I bought it from and the mechanic that swapped it that it was. I see the conversion kits come with a PCM, that should theoretically fix my shift points and torque converter problem as well. Now just need to figure out why the diff keeps heating up. With those gears it shouldn’t have any problems turning those tires
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Post a photo of the 5.8 PCM with the numbers visible.
Example:
The most important for me to see is the number string that contains 12A650 and the Catch Code as circled in the photo above.
I cannot imagine the engine would run at all if the 5.8L PCM was Speed Density and you left the original harness on the truck. Only two injectors would trigger.
Example:
The most important for me to see is the number string that contains 12A650 and the Catch Code as circled in the photo above.
I cannot imagine the engine would run at all if the 5.8L PCM was Speed Density and you left the original harness on the truck. Only two injectors would trigger.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
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Wild guess here, but that ECM is definitely for a 94 application and you used the 5.8 engine wiring harness. I think you inadvertently converted back to SD.
The transmission codes are another issue. AFAIK, the 5.8 in 94 was equipped with the E4OD. Your truck was originally equipped with the 5.0, so it may have either the E4OD, or the 4R70W. They use different shift logic and are not compatible with the other's ECM. A picture of your door sticker with the transmission code would be helpful.
The transmission codes are another issue. AFAIK, the 5.8 in 94 was equipped with the E4OD. Your truck was originally equipped with the 5.0, so it may have either the E4OD, or the 4R70W. They use different shift logic and are not compatible with the other's ECM. A picture of your door sticker with the transmission code would be helpful.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
The transmission codes are another issue. AFAIK, the 5.8 in 94 was equipped with the E4OD. Your truck was originally equipped with the 5.0, so it may have either the E4OD, or the 4R70W. They use different shift logic and are not compatible with the other's ECM. A picture of your door sticker with the transmission code would be helpful.
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So basically convert my engine using one of the kits.
https://shop.fiveologyracing.com/198...KIT-FSEMAK.htm
Should also solve transmission codes based on the pins being in different locations.
That fixes (theoretically) my starting and limp mode problem.
now the rear diff overheating, it shouldn’t get that warm. It’s running 4.55 gears and 35x12.5R20. With those gears I shouldn’t cook that diff especially not pulling anything but it has 2x now and I can’t get why, second time it cooked I put new carrier, rebuilt posi components, bearings, seals, pinion, abs sensor and tone ring in.
Edit: running synthetic gear oil and it boiled over highway driving in December in Alberta (-15 Celsius, 5 Fahrenheit)
https://shop.fiveologyracing.com/198...KIT-FSEMAK.htm
Should also solve transmission codes based on the pins being in different locations.
That fixes (theoretically) my starting and limp mode problem.
now the rear diff overheating, it shouldn’t get that warm. It’s running 4.55 gears and 35x12.5R20. With those gears I shouldn’t cook that diff especially not pulling anything but it has 2x now and I can’t get why, second time it cooked I put new carrier, rebuilt posi components, bearings, seals, pinion, abs sensor and tone ring in.
Edit: running synthetic gear oil and it boiled over highway driving in December in Alberta (-15 Celsius, 5 Fahrenheit)
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Your truck is (or was) already MAF. Buying that kit is adding a lot of extra cost when all you need (assuming someone has not butchered the existing wiring harness) is the correct MAF 5.8L PCM. In all reality the 5L MAF PCM should run a stock or mildly modded 5.8L engine with no custom tuning required. Something else amiss here.
As far as your differential overheating what is the backlash on the pinion/ring gear? Too tight will generate a lot of heat. What did the pattern look like when the gears were setup?
As far as your differential overheating what is the backlash on the pinion/ring gear? Too tight will generate a lot of heat. What did the pattern look like when the gears were setup?