lil_Blue_Ford
Cut & Weld
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V8 Engine Swap
- Joined
- Aug 6, 2007
- Messages
- 11,882
- Points
- 3,101
- City
- Butler
- State - Country
- PA - USA
- Vehicle Year
- 2000
- Vehicle
- Ford Ranger
- Engine
- 5.0
- Transmission
- Automatic
- Total Drop
- 4”
Ok, so my Choptop. 1989 Bronco II and I swapped in a 4.0 OHV years ago. Pretty sure the engine harness is from a 91 Ranger. I had run it on an automatic transmission computer for years and it got 12-14 mpg and ran rather rich. Couple months ago I bought a reman manual transmission computer for a 91 4.0 Ranger and a new oxygen sensor. After putting both in it ran better than ever and fuel economy jumped up. I'm not sure how much because I was on a partial tank when I did the swap and before I was able to do a full fill up things went bad. Exhaust is headers to 2.5" stainless single with a universal cat and Flowmaster 10 series (I had asked the exhaust shop to supply the cat and requested a Flowmaster 40 or Super 44 but they did what they wanted).
I also decided to install a heavy duty headlight harness upgrade which resulted in discovering that my radiator was leaking again. The repair there was to go to an aluminum rad and an electric fan because, well, I had them. Originally I had planned on putting them in my 88, but needing to keep this thing on the road, so yeah. I don't know if that had an influence on things or not.
Fuel tank, pump, lines and filter were all replaced within the last year to year and a half. IIRC it's an Airtex pump assembly. Plastic tank. New vent and grommet. fuel lines are -6an PTFE and 3/8" aluminum. Vent line is 1/4" Ni-Copp.
When I connected the battery back up after doing all of the electrical, it ran rather rough for awhile. I want to say that it did that when I replaced the computer as well and it took a drive cycle to smooth out but I'm not sure. I don't remember when I last replaced any sensors but most have been replaced at some point or other and I probably put a new thermostat in when this motor went in which was about 2 years ago. Sensors were off the previous motor though. I can warranty out sensors though.
No CEL showing but I pulled KOEO codes. I got a 23 which is a TPS error (I'm not having drivability issues and the TPS was replaced years ago), and a 67 which is an AC clutch issue.
I did pop open the reman computer and take a look. Didn't see anything obvious. Board looked a lot different than the old computer with a lot more surface mount stuff.
Right now it's stupid cold out so I'm waiting to try replacing some sensors and doing diagnostics. Right at the moment just trying to build a plan of attack to figure this out. It's getting really annoying not having this doing what it should. I'll take suggestions on what to check and diagnostic information at this point and will report back as I figure things out in between the weather being crap. I do have a decent set of diagnostic tools.
I also decided to install a heavy duty headlight harness upgrade which resulted in discovering that my radiator was leaking again. The repair there was to go to an aluminum rad and an electric fan because, well, I had them. Originally I had planned on putting them in my 88, but needing to keep this thing on the road, so yeah. I don't know if that had an influence on things or not.
Fuel tank, pump, lines and filter were all replaced within the last year to year and a half. IIRC it's an Airtex pump assembly. Plastic tank. New vent and grommet. fuel lines are -6an PTFE and 3/8" aluminum. Vent line is 1/4" Ni-Copp.
When I connected the battery back up after doing all of the electrical, it ran rather rough for awhile. I want to say that it did that when I replaced the computer as well and it took a drive cycle to smooth out but I'm not sure. I don't remember when I last replaced any sensors but most have been replaced at some point or other and I probably put a new thermostat in when this motor went in which was about 2 years ago. Sensors were off the previous motor though. I can warranty out sensors though.
No CEL showing but I pulled KOEO codes. I got a 23 which is a TPS error (I'm not having drivability issues and the TPS was replaced years ago), and a 67 which is an AC clutch issue.
I did pop open the reman computer and take a look. Didn't see anything obvious. Board looked a lot different than the old computer with a lot more surface mount stuff.
Right now it's stupid cold out so I'm waiting to try replacing some sensors and doing diagnostics. Right at the moment just trying to build a plan of attack to figure this out. It's getting really annoying not having this doing what it should. I'll take suggestions on what to check and diagnostic information at this point and will report back as I figure things out in between the weather being crap. I do have a decent set of diagnostic tools.
