3.8l to 5.0l
08-29-2012, 12:48 AM
#1
Thread Starter
Join Date: Aug 2012
Location: ohio
Posts: 15
3.8l to 5.0l
i got a 97 mustang from this guy and they took out 3.8l and put a 5.0l and rebuilt motor but didnt finish putting it back together and they cut up some or the wiring under hood! is there a wiring harness for a 97 mustang from 3.8 to 5.0? cause idk where any of these wires go since its got different motor and wires are cut up?
08-29-2012, 06:40 AM
#2
You just bought someone else's headache :-/ hopefully you or a friend is good with a multimeter and test lights cause your gonna be using them a lot, if there are any local junk yards go take a look under the hood of a factory 5.0, take pics and notes but your gonna be doing a lot of custom wiring, did it even come with the 5.0 computer or were they tryin to make it run off the 3.8 computer?
08-29-2012, 11:38 AM
#3
3rd Gear Member
Join Date: Dec 2006
Location: Canada EH
Posts: 617
I agree with BabyGT your going to have a lot of fun with this one.... The junk yard is going to be your new best friend. If you post a picture of the parts that are chopped someone MIGHT be able to point you in the right direction with some of the connections. I have attached you a general 3.8 engine control schematic. Hopefully this will get you started on your adventure.
Edit: Well apparently my attachments suck so PM me your email if you are interested in the schematics
Edit: Well apparently my attachments suck so PM me your email if you are interested in the schematics
08-29-2012, 07:45 PM
#4
You made a big mistake buying that car. Here's what really happened. They thought it would be easy swapping a v6 for a v8 but completely forgot about te fact that 96+ models are not directly comparable with 95 and before. So they tried to splice the wiring harness to make it work and royally screwed up.
In a nut shell you need to trash the harness in the car and do it the right way. You need to turn your car back into a 95.
You will need the following:
94/95 ecu that matches the transmission
Upper wiring harness (connects from the square box the fuel rails and ignition)
Lower harness, connects the upper to the lower ignition, timing, and engine sensors.
Transmission harness
Ecu harness (goes from the ecu to the engine bay and should have the lower half of the black box that mounts in the corner of the engine bay)
Dash harness
You will likely still need to do some splicing but that will get you most the way there. Depending on how much they moded the engine will determine how well the gt ecu works. Te 94/95 ecus are kind of sensitive and don't like heavy modding or swapping cams without a tune.
In a nut shell you need to trash the harness in the car and do it the right way. You need to turn your car back into a 95.
You will need the following:
94/95 ecu that matches the transmission
Upper wiring harness (connects from the square box the fuel rails and ignition)
Lower harness, connects the upper to the lower ignition, timing, and engine sensors.
Transmission harness
Ecu harness (goes from the ecu to the engine bay and should have the lower half of the black box that mounts in the corner of the engine bay)
Dash harness
You will likely still need to do some splicing but that will get you most the way there. Depending on how much they moded the engine will determine how well the gt ecu works. Te 94/95 ecus are kind of sensitive and don't like heavy modding or swapping cams without a tune.
08-30-2012, 07:29 PM
#9
Thread Starter
Join Date: Aug 2012
Location: ohio
Posts: 15
the bottom harness under hood is there i just dont know where the plus go and the top harness they took out! they spliced into ignition wire and hook up distributor to it and upper plus there stuck a wire in it and ran it to starter silinoide
08-31-2012, 01:18 PM
#10
2nd Gear Member
Join Date: Jun 2012
Location: Littleton, Colorado
Posts: 247
I agree with LilRoush on this one-Sell it and move on.
Considering the hack job the previous owner did on the job so far, how likely is that his rebuild is any good? I'd hate to see you go through the trouble and expense to get the v8 hooked up only to discover it was junk. I have had inexperienced rebuilder's engines throw a rod 800 miles after installation.
Considering the hack job the previous owner did on the job so far, how likely is that his rebuild is any good? I'd hate to see you go through the trouble and expense to get the v8 hooked up only to discover it was junk. I have had inexperienced rebuilder's engines throw a rod 800 miles after installation.