Sounds like a problem that I had. The harness I thought was from a 96 4runner ended up being from a 96 tacoma. Turns out that the pin locations are different and the Tacoma had different sensors (like tps). Luckily I caught it before I finished my wiring. The stupid yard that I ordered it from told me about 3 times that it was from a 96 Runner but finally they said it had actually come out of a Tacoma.

 

Ah....wasn't sure if it was a resistance value or and on/off type. Most of the time you only see that type (idle up) for stuff like AC, didn't know it did that for PS too on later years. Answer is easy either way, ignore it!

 

Well MANY MANY MANY thanks to EVERYONE who helped me with my 3.4L swap problems. It was a long and very drawn out process but in the end I got it started last night!!!!

I took the advice of MLT_4Runner and modify my existing 96 4Runner A/T engine wiring harness to work with my 98 4Runner ECU. And surprisingly it was VERY easy to do. Spending a few hours studying the EWDs for both the 96 and 98 then compiling a chart of the pinouts and where they need to terminate turned into a running engine.

This is a very viable option for those wanting to do a swap and cannot find an M/T 4Runner engine wiring harness for some reason. Because before I altered my harness I called many many other wrecking yards looking for a harness and the majority mentioned they do not have them because they are very hard to find as a result of many people doing these swaps.

History in my quest:
-Drove 7hrs from Oregon Dunes to Poulsbo, WA without a hitch (April 05)
-Next day 4Runner started blowing steam. Then had the Runner towed home. Yep blown head gasket.
-Called stealership to cross reference my VIN vs. their database to see if the HG recall was done on the engine. Yep it had been (pervious owner)
-Weighing my options: Fix the HG or create something that will actually accelerate up hills.
-Heard faintly about the 3.4L engine swaps but then did further research.
-Decided, and then convinced my wife this was what we needed to do (an amazing feat in itself)
-Searched and finally found an engine. My mistake as we all learned for buying from out of state from an unknown wrecking yard. (June 05)
-Gathering parts, Decided to get the ORS harness to save time! (yeah right)
-Year, Months, Weekends, and nights (ok mostly only on weekends) of wrenching, yanking, etc the engine is in (September 05).
-Engine finally started. (July 06)

After altering my 96 harness I then realized how I could have built my own harness and opt not to use the ORS harness. I could have only done this now that I have a good understanding of the harness and its functions. Reading and studying for the swap before I even committed to it is a little confusing until I actually started doing it and seeing what exactly I had to work with.

For example: I never had the oil pan off my 3.0 and never understood other posts about the double pan gasket and the sandwiched oil splash thingy.

Anyway I am very happy. Just need to get it on the road! And detail it....It got a little mildew inside from sitting for so long.

:bigclap:

 

Congrats on getting that thing running now lets see some pics.

:bigclap:

,Thomas

 

I'm so happy for you I could almost cry.

 

WooHoo!!!!!!!!!!!!!!!!

 

Yeaaaaaaaa!

 

Nice job Pozi, glad to see all the perseverence paid off finally.
Now it's time to break open a few cold ones and put some miles on that puppy!
......obviously not at the same time....

Post some pics if you can.

 

Right. Pictures are in the future. Nothing facny though.

Still have some loose ends to tie up and run some exhaust. It sure was loud when it started with stright headers!

 

Yeah open headers & no pipes = very loud and no power.
Is she on the street yet and are you enjoying it.

 

It seems I can't spell after reading my previous post.

But it is running and driving. Though I am spent on money for this thing and I still need a few items. Like a new radiator... And possibly a PS pump. There is howling sound coming from under the hood when running. I thought it is either the pump or alternator bearings. I have not taken off belt combinations to isolate the problem yet though.

Since this thread was sort of resurrected I do have a slight problem when driving. After the engine is at operating temperature and doing at least 20-30mph the rpms drop to the point of almost stalling then it immediately increases again. It continues this cycle of increasing and decreasing the rpms until I am doing less then 20mph or if I am braking while in gear. So this problem only raises it's head when the engine has no strain (i.e. in neutral or clutch disengaged). I figure there must be a vacuum line issue.

Oh and another potential issue: Also when the engine is at operating temp the "cold-air" intake is almost too hot to touch. I have the InJen intake system as seen here: I got a good deal on a used one and opted to use an aftermarket model because the OEM intake did not fit in my 4Runner.

Otherwise the 4Runner is actually fun to drive. The exhaust is pretty loud (too loud for my wife's taste) so I am going to switch out the muffler with a quieter one. Right now I have a Carsounds cat and Magnaflo muffler.

 

Yeup... I've said it many times here, those "cold air" boxes are worthless. The "cold air" would last maybe 10 minutes under my hood.

The only valid cold air intake I've seen on our rigs is one where a guy grafted an intake to fit into the space between the bumper and the headlight. There's an old thread around here somewhere.

 

dude congratulations, that must have really sucked having your runner down that long.

 

I'll buy your other ECM if its not fried.

 

Thanks for the offer but it already sold. Check out fleabay; it's where I originally bought it.