Throttle Body Rebuild
Oldguyinajeep
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- Location
- Derby, KS
- Vehicle(s)
- '86 CJ-7 258ci 4spd Dana 30 and 44
Howell TBI Fuel inj, Headers, Dual batteries, Warn winch/air compressor, rear
disc brake conversion, Detroit locker (rear), Eaton E-locker (front), 4:10 gears, 2.5 in Rancho lift, 1" body lift, fully armored, 35" BFG KM2s, Warn front hub conversions, line locks front and rear, roll cage, warn front bumper, rock hard rear bumper/tire carrier, DUI ignition, dual electric fans, LED rock lights
I'm posting this in order to answer a couple of questions which came to me during my recent GM throttle body rebuild, in hopes it can help guide others through the process.
My 86 CJ7 has a Howell TBI fuel injection kit on it, and it's old enough that things were getting sluggish. When I decided to rebuild the TBI, I watched some videos and read some forums. Those were helpful, and here's some info that may also make the job easier:
First of all, this is an easy job. If you've ever rebuilt a carb, you'll find this extremely elementary. Even if you are just a fair to average shadetree mechanic, this is very basic. I found reference to some guys who sell rebuilt TBIs on E-bay for around $210. My rebuild costs were:
- rebuild kit (Standard Motor Products brand, PN 1527D) $50
- fuel injector testing and cleaning $14/ea $28 total
- idle air controller (Borg Warner) $45
- carb dip (1 gal. from O'Reilly Auto) $30
So...I have $153 and change in the project. Here's how I could have saved more money: I usually prefer high quality parts for most things, but after having seen what's used from the rebuild kit, I'd be fine with the cheapest kit I could find. Honestly, it's just a few gaskets and o-rings. I can't see anything where a high end brand could possibly make a difference.
If I were doing it again, I'd take the disassembled unit to a friendly mechanic and have him soak it in his dip tank. I'm sure it would be less than the $30 I spent. But I was in a hurry.
Helpful hints:
The TBI I have, with part # 17095124 apparently does not exist. At least Standard doesn't think so. The parts guy couldn't find it in their info, and when I called Standard tech support, they couldn't either. The kit I list above, however, has all the parts needed. If you go with a cheaper brand, they should be able to cross-reference to Standard's #.
You don't need to buy new injectors. There are several videos that have DIY ways of cleaning these, and I ran across references to a couple of places online that you can send them to for testing and cleaning. A quick web search led me to a local shop, Advanced Injector, in Valley Center, KS (you can google them), which provides this service. He works with a lot of local racers, as well as sports car clubs, performance enthusiasts, and plain 'ol guys like me nationwide. He tells me he has very rapid turn around for his internet-base service. My experience was, I dropped them off one afternoon, and picked them up the next day. Plus, He was $4 less per injector that the other guys online. Bonus!
Anyway ,I hope this is helpful. BTW, it runs great! I feel like I got a new engine.
My 86 CJ7 has a Howell TBI fuel injection kit on it, and it's old enough that things were getting sluggish. When I decided to rebuild the TBI, I watched some videos and read some forums. Those were helpful, and here's some info that may also make the job easier:
First of all, this is an easy job. If you've ever rebuilt a carb, you'll find this extremely elementary. Even if you are just a fair to average shadetree mechanic, this is very basic. I found reference to some guys who sell rebuilt TBIs on E-bay for around $210. My rebuild costs were:
- rebuild kit (Standard Motor Products brand, PN 1527D) $50
- fuel injector testing and cleaning $14/ea $28 total
- idle air controller (Borg Warner) $45
- carb dip (1 gal. from O'Reilly Auto) $30
So...I have $153 and change in the project. Here's how I could have saved more money: I usually prefer high quality parts for most things, but after having seen what's used from the rebuild kit, I'd be fine with the cheapest kit I could find. Honestly, it's just a few gaskets and o-rings. I can't see anything where a high end brand could possibly make a difference.
If I were doing it again, I'd take the disassembled unit to a friendly mechanic and have him soak it in his dip tank. I'm sure it would be less than the $30 I spent. But I was in a hurry.
Helpful hints:
The TBI I have, with part # 17095124 apparently does not exist. At least Standard doesn't think so. The parts guy couldn't find it in their info, and when I called Standard tech support, they couldn't either. The kit I list above, however, has all the parts needed. If you go with a cheaper brand, they should be able to cross-reference to Standard's #.
You don't need to buy new injectors. There are several videos that have DIY ways of cleaning these, and I ran across references to a couple of places online that you can send them to for testing and cleaning. A quick web search led me to a local shop, Advanced Injector, in Valley Center, KS (you can google them), which provides this service. He works with a lot of local racers, as well as sports car clubs, performance enthusiasts, and plain 'ol guys like me nationwide. He tells me he has very rapid turn around for his internet-base service. My experience was, I dropped them off one afternoon, and picked them up the next day. Plus, He was $4 less per injector that the other guys online. Bonus!
Anyway ,I hope this is helpful. BTW, it runs great! I feel like I got a new engine.
