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Jeep Wrangler YJ
YJ Build Threads & Member's Rides
Old School 4.3 Drivetrain Swap
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<blockquote data-quote="Walt Jaquith" data-source="post: 425200" data-attributes="member: 18654"><p>Heh. I'm not simple enough to ever want to tune another carburetor. With the Fuel injection, the 'simple' comes after, when you get it running and it just works. Last time I did one of these I took a 70s era 350 and retrofitted early 90s throttle body injection on it. It worked great. I used an old stock harness, and that was by far the biggest pain of the project. Painless had a sale last December, and I knew this project was coming so I sprung for the all new harness. it should be a lot easier, and the stock Jeep fuel pump ought to be adequite... another plus for the old V6. The 4.3 has plenty of places to thread in a temp sender, so I'll use a YJ sender for the gauge in addition to the GM unit for the fuel injection. The two engines used the same general type of oil pressure sender, so the Jeep unit just screwed right in.</p><p></p><p>One thing I haven't figured out is how to adapt the speedometer. The 700R4 has a speed sensor that fed the S10s speedometer, and is also used by the FI/emissions. It puts out a pulse, and the speedometer on the jeep accepts a ulse, but research indicates they're not the same. There will have to be a conversion of some sort. It might be easier to retrofit the S10 speedometer into the Jeep.</p><p></p><p>Just keep in mind that all the little stuff adds up in a hurry.</p></blockquote><p></p>
[QUOTE="Walt Jaquith, post: 425200, member: 18654"] Heh. I'm not simple enough to ever want to tune another carburetor. With the Fuel injection, the 'simple' comes after, when you get it running and it just works. Last time I did one of these I took a 70s era 350 and retrofitted early 90s throttle body injection on it. It worked great. I used an old stock harness, and that was by far the biggest pain of the project. Painless had a sale last December, and I knew this project was coming so I sprung for the all new harness. it should be a lot easier, and the stock Jeep fuel pump ought to be adequite... another plus for the old V6. The 4.3 has plenty of places to thread in a temp sender, so I'll use a YJ sender for the gauge in addition to the GM unit for the fuel injection. The two engines used the same general type of oil pressure sender, so the Jeep unit just screwed right in. One thing I haven't figured out is how to adapt the speedometer. The 700R4 has a speed sensor that fed the S10s speedometer, and is also used by the FI/emissions. It puts out a pulse, and the speedometer on the jeep accepts a ulse, but research indicates they're not the same. There will have to be a conversion of some sort. It might be easier to retrofit the S10 speedometer into the Jeep. Just keep in mind that all the little stuff adds up in a hurry. [/QUOTE]
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Jeep Wrangler YJ
YJ Build Threads & Member's Rides
Old School 4.3 Drivetrain Swap
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