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Old 03-01-2015, 08:45 PM   #11
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Look at Nistune too. If you really want to do it yourself do a megasquirt.

With OBD 2 you have tuning advantages. You can even get a programmer for it. Pre OBD2 you cannot do that.

The JWT/4x4parts tunes are expensive but for some of us, like me and my 86.5, its the only option without going megasquirt.
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Old 03-05-2015, 02:04 AM   #12
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If I were you i'd stay obd2 emissions testing is inevitable not a matter of if but when & testing with obd2 is done through the port not exhaust sniffer. You'll fail before the test begins and have to put it back to obd2 to have plates.

Also like said above there's advantage to having obd2 with tuning just more involved.
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Old 03-05-2015, 02:12 AM   #13
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Emissions not required for me.

Ive gave up on this post anyway, everyone gives there opinions and tells what they would do, and my original question wasn't answered.
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Old 03-05-2015, 02:31 AM   #14
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I believe it was by several people all of whom said you would need wiring harness and ECU from a truck with a non mechanical speedo what was OBD 1 compliant. Some sensors would eliminated and some would not. I believe OBD1 trucks still like to watch the emissions stuff. Even my 86.5 will go into limp mode if I kill off the O2 sensor as it needs it to run while I have zero emissions controls and no CEL.

The level of work required is why people suggested different options.
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Old 03-05-2015, 03:04 AM   #15
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My post is asking if there are any other parts or any tricks thats needed to get this done. I have a list of what I know I need, ecu and wiring harness were already listed. So there is one person agreeing with me and saying do it, and the rest are suggesting their opinion what they would do.

Non mechanical speedometer had not been mentioned in previous comments until now.

OBD1 ka24e can run with no CELs while having no emissions.

O2 sensor isn't apart of emissions. It's to measure the amount of oxygen in your header. 96 and 97 have a secondary o2 sensor, purpose of it is to insure your catalytic converter is working properly.

My truck has no emissions, which causes tons of CELs. Has a fuel cell, which causes a CEL because of a fuel temp sensor. Has a custom exhaust with no cat, so it causes a CEL because the secondary O2 sensor is not reading correctly.
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Old 03-05-2015, 03:28 AM   #16
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Was not sure what year started the secondary O2. All I know is my 86 will go to limp mode without the O2 since it can no longer do proper fuel/air.

The reason people were giving opinions because it can be solved far easier than swapping an entire harness and ECU. ECU fash can null or remove those warnings. As long as it is running fine the easiest thing might be to just pull the CEL light.

I think OBD was introduced at the same dime as the electronic speedo but not 100% on that. Either way going mechanical speedo would make things different and more involved.

I still hold by my previous skip it and either flash it out or use a tuner to clear/ignore those codes and keep OBD 2 for dianostics and tuning purposes.
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Old 03-05-2015, 03:19 PM   #17
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I know nothing, but offer some suggestions perhaps (you can trash it if you want) I do have a question and may have missed something, this is for a 97 HB right?

If you want to run OBD1, why not just get the ECU with harness and rewire the harness to fit your needs and leave out what's not needed (the emissions part). Its got to be pretty much the same, just follow the diagrams and make sure they match. If there are any other components that need to be swapped, suppose those would have to be done too.

Change the engine to a pre-OBD2, and not necessarily a KA at that. Do a V8 or something. If you are into tuning it that much, build a beast.

Its got to be easier than everyone is thinking. Speaking extemporaneously, there has to be minimal difference between a 95 (OBD1) and a 96 (OBD2). Honestly, everyone think about it. Engines, sensors, emissions, and such would not have been radically redesigned so much that one COULD NOT work with the other. There's always a way, even if it took to cheating the sensor sockets with resistors, it can be done I would think (case and point an oxygen generator for cut cats).
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Old 03-06-2015, 04:59 PM   #18
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Ok well, just a heads up I have been looking at ways to tune an OBD1 truck and the cheapest way to even be able to tune it is to go to a Mega Squirt system which is around 350-400 bucks and from what I seen it requires a lot of work to get in there. then you lose all On board Diagnostic function period. the remapped ecu would serve you better and there are programmers out there so you can retune it yourself. To do a mega squirt if you were to have a shop do it it would be in the $1000's. I'm in the same boat and I'm swapping to OBD2 for simplicity.
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Old 03-06-2015, 05:41 PM   #19
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As someone with an ODB1 truck, I'd much rather it either not have any electronics at all or have ODBII. ODB1 sucks.
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Old 03-07-2015, 02:38 PM   #20
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Oldgrey, yours is OBD?!?! Mine doesnt even have the proper check connector!
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