Jeep Wrangler Forum

Jeep Wrangler Forum (http://www.wranglerforum.com/)
-   YJ Tech Forum (http://www.wranglerforum.com/f218/)
-   -   High desert help (http://www.wranglerforum.com/f218/high-desert-help-236499.html)

Nikondsindent 04-20-2013 09:11 AM

High desert help
 
Anyone done one or knows someone that can help me put a fuel injection kit on my 89 jeep wrangler 4.2?

cakes567 04-20-2013 09:32 AM

Mine has the mopar fuel injection kit in it. I bought jeep with it already put in. Did you buy a kit yet or just thinking about getting one?

Nikondsindent 04-20-2013 09:57 AM

Want to get the Howell it's 1300 but the jeep shop wants about a day and a half labor(~$750)

cakes567 04-20-2013 10:02 AM

I dont think its very hard. But if heard it takes forever and is a lot of work. I'm not sure about the kit you want but mine came with a new intake manifold and tons of other things

NonRubicon 04-20-2013 02:26 PM

High desert is a bit too far for this unemployed Jeeper to roam at the moment, else I would be able to help you in person - situated in the Corona-Norco area right now and pinching my pennies.

I did my own install by myself (having never done anything like it before), and while it took some time and was a little daunting at first, in hindsight it wasn't that difficult and I'm much more familiar with the install. Be forewarned - the instructions may make a whole lot more sense after you do the install. Still doable though. More like a carb swap and an electric fuel pump mod, plus a few sensors to replace/install. No messing with the intake or exhaust manifolds, no balancers to install. Much simpler than a MPFI kit.

If you have the tools to pull the carb, and can cut and cap off the air pulse tubes (I welded mine closed), and cut the fuel lines, then you can do a Howell TBI install. A day and a half seems fair for time estimate for work (RTV needs to cure overnight), but I wouldn't pay someone to do the install. For myself, the part that seemed to take the longest was gutting the old computer related wiring from the harness. I spent a few days wrenching to get the Howell installed, including installing a new intake/exhaust gasket (my old exhaust manifold was cracked). Even if it takes you a few days to get it done, it is well worth the savings. I spent much more time thinking about what I had to do, than I spent actually turning a wrench. Plus you get to puff your chest out a bit for doing the job yourself and you are more familiar with the install.

Check the Howell website for the install instructions to see what it entails. You can also web search for Howell TBI install write-ups.

The Howell is a big improvement over the Carter BBD. Well worth it.

cakes567 04-20-2013 10:27 PM

Quote:

Originally Posted by NonRubicon (Post 3661001)
High desert is a bit too far for this unemployed Jeeper to roam at the moment, else I would be able to help you in person - situated in the Corona-Norco area right now and pinching my pennies.

I did my own install by myself (having never done anything like it before), and while it took some time and was a little daunting at first, in hindsight it wasn't that difficult and I'm much more familiar with the install. Be forewarned - the instructions may make a whole lot more sense after you do the install. Still doable though. More like a carb swap and an electric fuel pump mod, plus a few sensors to replace/install. No messing with the intake or exhaust manifolds, no balancers to install. Much simpler than a MPFI kit.

If you have the tools to pull the carb, and can cut and cap off the air pulse tubes (I welded mine closed), and cut the fuel lines, then you can do a Howell TBI install. A day and a half seems fair for time estimate for work (RTV needs to cure overnight), but I wouldn't pay someone to do the install. For myself, the part that seemed to take the longest was gutting the old computer related wiring from the harness. I spent a few days wrenching to get the Howell installed, including installing a new intake/exhaust gasket (my old exhaust manifold was cracked). Even if it takes you a few days to get it done, it is well worth the savings. I spent much more time thinking about what I had to do, than I spent actually turning a wrench. Plus you get to puff your chest out a bit for doing the job yourself and you are more familiar with the install.

Check the Howell website for the install instructions to see what it entails. You can also web search for Howell TBI install write-ups.

The Howell is a big improvement over the Carter BBD. Well worth it.

What's different between the Howell kit compared to the mpfi kit? Advantages disadvantages? To be honest I dont really know a lot about mine of other kits for that matter.

Xpress 04-20-2013 10:51 PM

The howell FI kit is a TBI setup (or Throttle body Injection). Basically there is one big injector (or maybe 2, not sure on the Howell kit) inside of the throttle body before the butterfly valve. It's like an electronic carb, but it's not a carb.

The Mopar MPFI (Multi-Port Fuel Injection) kit is a more modern style setup that has one injector per cylinder, mounted at the edge of the manifold on the engine side, and one throttle body for the intake.

cakes567 04-20-2013 11:01 PM

Quote:

Originally Posted by Xpress (Post 3662687)
The howell FI kit is a TBI setup (or Throttle body Injection). Basically there is one big injector (or maybe 2, not sure on the Howell kit) inside of the throttle body before the butterfly valve. It's like an electronic carb, but it's not a carb

The Mopar MPFI (Multi-Port Fuel Injection) kit is a more modern style setup that has one injector per cylinder, mounted at the edge of the manifold on the engine side, and one throttle body for the intake.

I thought mine was like a tbi until I studied it more. But man are they expensive. So glad the guy I bought the jeep from payed for it and not me!

NonRubicon 04-21-2013 02:13 AM

Quote:

Originally Posted by cakes567 (Post 3662586)
What's different between the Howell kit compared to the mpfi kit? Advantages disadvantages? To be honest I dont really know a lot about mine of other kits for that matter.

Here in California if you want fuel injection on your 4.2L, it's either the Howell or Mopar kits. Nothing else is CARB approved. The only other way to get rid of the Carter BBD on a YJ is to do an engine swap to fuel injection.

Howell TBI (~$1300) is MUCH less expensive than the Mopar MPFI kit (~$2500?). That's the big thing that Howell has going for it. Also, the Howell install is much simpler than the Mopar MPFI kit install. One thing you need to buy that isn't included in the MPFI kit is a harmonic balancer. The Howell TBI kit is based off of the '90's 4.3L Chevy/GMC engines, while the Mopar kit is based on the 4.0L YJ Wrangler engine.

MPFI however delivers precise fuel amounts directly to each cylinder where it then mixes with air, while TBI behaves more like a carb and the fuel/air mix in introduced at a single point (throttle body) and drawn into the cylinders. TBI is kinda like a carb in that fuel is introduced at the throttle body, but it is much more precise and pressure injected (vs drawn in by air). In the TBI case (and carbs) the air fuel mix isn't always equally distributed because of the intake design has some runners longer than others. The MPFI can produce most power, consistently, while also producing lower emissions. If you have an older engine, the Mopar MPFI kit isn't recommended due to tendency for detonation to occur because of the power increase.

The Howell TBI is a good buy for the performance increase if you are set on keeping the 4.2L for it's low end torque but want to ditch the Carter.

cakes567 04-21-2013 10:03 AM

Quote:

Originally Posted by NonRubicon (Post 3663084)

Here in California if you want fuel injection on your 4.2L, it's either the Howell or Mopar kits. Nothing else is CARB approved. The only other way to get rid of the Carter BBD on a YJ is to do an engine swap to fuel injection.

Howell TBI (~$1300) is MUCH less expensive than the Mopar MPFI kit (~$2500?). That's the big thing that Howell has going for it. Also, the Howell install is much simpler than the Mopar MPFI kit install. One thing you need to buy that isn't included in the MPFI kit is a harmonic balancer. The Howell TBI kit is based off of the '90's 4.3L Chevy/GMC engines, while the Mopar kit is based on the 4.0L YJ Wrangler engine.

MPFI however delivers precise fuel amounts directly to each cylinder where it then mixes with air, while TBI behaves more like a carb and the fuel/air mix in introduced at a single point (throttle body) and drawn into the cylinders. TBI is kinda like a carb in that fuel is introduced at the throttle body, but it is much more precise and pressure injected (vs drawn in by air). In the TBI case (and carbs) the air fuel mix isn't always equally distributed because of the intake design has some runners longer than others. The MPFI can produce most power, consistently, while also producing lower emissions. If you have an older engine, the Mopar MPFI kit isn't recommended due to tendency for detonation to occur because of the power increase.

The Howell TBI is a good buy for the performance increase if you are set on keeping the 4.2L for it's low end torque but want to ditch the Carter.

That makes a lot of sence. But I just can not belive my kit cost $2500. That's crazy. I payed 3200 for my jeep and that was like brand new. Talk about a loss on the original owners part. Cuz that jeep even with out the injection system is worth every but of the 3200

Nikondsindent 04-21-2013 10:16 AM

http://www.jeep4x4center.com/howell/

Should I buy from here or from the actual Howell website?

cakes567 04-21-2013 10:59 AM

Quote:

Originally Posted by Nikondsindent (Post 3663907)
http://www.jeep4x4center.com/howell/

Should I buy from here or from the actual Howell website?

Shouldn't matter where you buy it from. Just check prices and stuff. I know quadratec.com sells that kit as well. Just look and see who has better prices for shipping and stuff like that.

NonRubicon 04-22-2013 10:51 PM

Quote:

Originally Posted by cakes567 (Post 3663868)
That makes a lot of sence. But I just can not belive my kit cost $2500. That's crazy. I payed 3200 for my jeep and that was like brand new. Talk about a loss on the original owners part. Cuz that jeep even with out the injection system is worth every but of the 3200

Well, in states that do not require CARB approved modifications (or otherwise use CA standards for smog testing), some people do a junkyard sourced upgrade to a 4.0L head, intake and MPFI setup (the Mopar kit uses an intake specifically designed for the 4.2L head, the junkyard mod needs to use the 4.0L intake and head). The junkyard route takes more time to source all the parts, but you save tons of money. Can't do the junkyard upgrade here in California if you want a smog legal vehicle.

Quote:

Originally Posted by Nikondsindent (Post 3663907)
Jeep Fuel Injection Conversion Kits by Howell

Should I buy from here or from the actual Howell website?

As suggested by cake567, shop around the reputable retailers and go with whoever can give you the best deal, shipping included. Make sure you get the CA legal kit. IIRC, I got mine from 4WheelParts - shipping was cheaper than anywhere else.


All times are GMT -5. The time now is 05:35 AM.