What do i have here???

For everything related to using Fuel Injection in an FSJ.
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babywag
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Re: What do i have here???

Post by babywag »

Nah, just buy a kit and rebuild TB yourself, dirt simple.
I have used Mr. Injector for cleaning in past, http://www.mrinjector.us/
No complaints, provided quick turn around.

Now there is a good place local to me, so I just use them for injectors.
-Tony
'88 GW (aka Babywag)
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tedlovesjeeps71
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Re: RE: Re: What do i have here???

Post by tedlovesjeeps71 »

babywag wrote:Nah, just buy a kit and rebuild TB yourself, dirt simple.
I have used Mr. Injector for cleaning in past, http://www.mrinjector.us/
No complaints, provided quick turn around.

Now there is a good place local to me, so I just use them for injectors.
Thanks again. It'll be a while before I'm in a position to male make it happen but I greatly appreciate the info.

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babywag
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Re: RE: Re: What do i have here???

Post by babywag »

tedlovesjeeps71 wrote:
babywag wrote:Nah, just buy a kit and rebuild TB yourself, dirt simple.
I have used Mr. Injector for cleaning in past, http://www.mrinjector.us/
No complaints, provided quick turn around.

Now there is a good place local to me, so I just use them for injectors.
Thanks again. It'll be a while before I'm in a position to male make it happen but I greatly appreciate the info.

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Here is the info/results of the last set I had cleaned.
https://drive.google.com/file/d/0BxIOfZ ... sp=sharing

Considering a new pair from McParts stores are ~$80/ea., and JY injectors are unknown...it's well worth it to have a set cleaned.
No guesswork, no wondering what they're actually flowing, etc.
-Tony
'88 GW (aka Babywag)
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

So in a semi related question, anyone know what adapter is needed to mate the tbi to the stock 91 intake manifold? Also, in an effort to get a quick fix, could I use an adapter to slap one of my spare,new edelbrock carbs on the stock manifold??


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babywag
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Re: What do i have here???

Post by babywag »

http://www.ebay.com/itm/261954954205

I used a spacer to go 4bbl intake -> 2bbl carb for smog testing(4bbl carb not allowed), not sure you can go the other way on stock 2bbl intake?
-Tony
'88 GW (aka Babywag)
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

So here's another odd question. As I have this "kit" which is complete but needing a new chip, would it be outlandish to think I could duplicate it? Maybe order the connectors online, grab a couple brain boxes from the junkyard. Already have a few spare tbi units in storage. Order extra chips and duplicate the wiring etc... is that feasible?


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babywag
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Re: What do i have here???

Post by babywag »

both my "systems" are from used JY parts w/ new bits here and there.
It has been done many times by many folks.
There are also multiple sources for new harnesses.
They whole lot from a '90-ish g20 van set me back $110 @ local pick your part.

With a wiring diagram and some time/effort thinning the harness is pretty simple.
-Tony
'88 GW (aka Babywag)
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

So I was pondering how so many have issues mounting the bran box to keep it from being damaged by the elements. I remembered I have a bunch of these small ish pelican boxes I pulled out of the dumpster while stationed in Germany. Being watertight/dust proof it seems they would be perfect. Mount it under the hood, route the wires, seal the brain inside. Easy to access when needed. My question is do the brains generate any heat? Wouldn't want it to fry due to being sealed away. Thoughts?
Pics of the box.
ImageImageImage


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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

Talked to bill about a new chip. He gave me this info as a price guide:

The custom tune is $150
CNC Adapter is $80
Timing conversion pigtail is $35
Duraspark distr conversion is $75
Data cable is $30

A couple questions about this stuff. He said for a dd that the stock 91 manifold is fine. What all is involved with the dizzy conversion and is spark control worth it? We live in Colorado so trips up/down elevation are likely. And what's this data cable he speaks of??


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babywag
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Re: What do i have here???

Post by babywag »

Distributor you'd have to ask him? Guessing modified wiring, mechanical/vacuum advance locked out, and reluctor made adjutable for proper phasing.
YES timing control is worth it. It allows the ecm to take full control and adjust like it was designed to do. If you're changing altitudes I highly recommend it.
Data cable allows you to log data, which can be used for diagnostics, but more so for proper tuning.
With good data an engine can be tuned very well and run much better.
-Tony
'88 GW (aka Babywag)

FSJ Guy
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Re: What do i have here???

Post by FSJ Guy »

If you want to add timing control, you might as well do the tuning yourself, too. By the time you add up the cost of paying someone else to do it, you have bought a Burn2, chip and chip adapter from Moates. Distributor mod is welding the distributor so that the centrifugal advance is locked out.

As for putting the ECM in a box, sure, you could do it. But it's just as east to stick it under the dash. There are a lot of wires that run to the ECM. Sealing that many wires would either involve an expensive connector or an ugly amount of silicone. :- )
Ethan Brady

http://www.bigscaryjeep.com

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FSJ Guy
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Re: What do i have here???

Post by FSJ Guy »

Oh, and you have to have a welded distributor in order to add timing control.
Ethan Brady

http://www.bigscaryjeep.com

Jeepless, but I still have a lots of old parts in my garage!

ferrum
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Re: What do i have here???

Post by ferrum »

For data cable, I bought very reasonably priced one babywag posted a while ago. I'm not sure if it is still available. Following is the link to post.

http://fsjnetwork.com/forum/viewtopic.php?f=35&t=10272

It was around 10 bucks.
'76 Cherokee Chief
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

Ok, I sent Bill an email last week but haven't heard anything. What 02 sensor do I need and where's a good place to get the weld in bung?


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babywag
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Re: What do i have here???

Post by babywag »

Depends on when kit was built...could be 1-wire or 3-wire.
1-wire just lookup '87-'93 GM truck w/ 5.7, 3-wire IIRC they started using them in '94?

Can buy an o2 bung from many online sources just search. Any good exhaust shop will have them as well.
-Tony
'88 GW (aka Babywag)
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

babywag wrote:Depends on when kit was built...could be 1-wire or 3-wire.
1-wire just lookup '87-'93 GM truck w/ 5.7, 3-wire IIRC they started using them in '94?

Can buy an o2 bung from many online sources just search. Any good exhaust shop will have them as well.
How can I look at it to determine what's what? Which plug is for the O2?


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babywag
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Re: What do i have here???

Post by babywag »

One way would be to use a wiring diagram
http://www.fsjnetwork.com/forum/viewtop ... =35&t=5099
-Tony
'88 GW (aka Babywag)

FSJ Guy
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Re: What do i have here???

Post by FSJ Guy »

Personally, I like the heated O2 sensors. They warm up quick and STAY warm. You can wire them into any existing harness that was originally wired for a 1 wire sensor. The extra 2 wires are for the heater element. One gets ground, the other gets 12V switched with the ECM. If it's a 4 wire unit, then that means the 4th wire is ground for the sensor.
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Nikkormat
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Re: What do i have here???

Post by Nikkormat »

I don't know if you want to mount the ECM under the hood. It's not exactly something that I'd want getting hot/cold/hot/cold all the time. It's all old school electeonics.

And I agree with Ethan, you can modify your own ECM and tune chips for about the same as getting a chip from bill. And that way you can tune it without waiting for a new one to ship in from WA.
Gabe, "reformed" Jeep hoarder.
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tedlovesjeeps71
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Re: What do i have here???

Post by tedlovesjeeps71 »

Nikkormat wrote:I don't know if you want to mount the ECM under the hood. It's not exactly something that I'd want getting hot/cold/hot/cold all the time. It's all old school electeonics.

And I agree with Ethan, you can modify your own ECM and tune chips for about the same as getting a chip from bill. And that way you can tune it without waiting for a new one to ship in from WA.
Thanks for the advice. Honestly, I'm not friendly with computers and burning my own chips sounds like a failure waiting to happen. Gotta be honest with my skills. I am a little surprised I never heard back from Bill. *shrugs*
I'll lay the harness out on the bed in a few and see if I can identify what connection is what. May give me a better idea of what I'm dealing with.
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