Drewandhis89Yota

muddpigg

iTrader: (1)

Probably easiest is when swapping engine to use sensors from original and original wiring harness. Then if ECU is fried replace it with same year model.

Why do you think ECU is fried?

wyoming9

iTrader: (1)

If I read this right your just replacing the ECU??

Unless the Rodents ate the stickers off it should have a Toyota part number on it just get the same one.

cnrtransmissions

check out rockauto toyota year motor then mt transmission. Id stick with the original year off truck ecu but thats my opinion. Dont get an a/t ecu you will have huge issues they are all remanned for years and not that expensive.

Drewandhis89Yota

Well number one I am sorry about this crappy post and I do appreciate the replys. It was a while ago when I thought it was the ecu. And I always thought the next time I touch the truck I would start with an ecu. So I got on eBay today to buy an ecu but it says they go by part numbers not only by year. There are like three different part numbers for same years. I believe it is ecu cause it had spark fuel and air the last time I touched it. it just cranks and cranks with no sputter or anything. now that I’m thinking about it it could be crank sensor? (I have some more experience now compared to then) about 8 years ago. but the reason I think it is ecu is because I heard that if you engine swap and use incorrect ecu t could lead to problems. (I did not know this at the time, I heard this years later or I would have held onto the 4Runner ecu)

Drewandhis89Yota

Drewandhis89Yota

cnrtransmissions

If im correct the crank position sensor is integral in the distributor (I THINK) I do know toyota in these years didnt use a crank sensor persay like other car manufactures did and monitors from distributor. So you dont have no fuel or spark?

Drewandhis89Yota

cnrtransmissions

If you go the rock auto way its under the electrical section not manual transmission section(my bad) I just looked and from dealing with transmissions and ecu's alot in my field my advice is get the ECU for the year of your truck the motor between 89 and 90 aint gonna care sensor wise but first check out the fuel air sensor (MAF) on other cars if it aint working it wont allow fuel or spark kind of like what a crank sensor does on other cars makes and models.. but if you get fuel i'd be looking at igniter or distributor before replacing ECU.

Drewandhis89Yota

ok Thank you very much. I have a lot of work ahead of me lol . Wish me luck. Thank you all

akwheeler

I wouldn't just throw money at an ECU without testing a lot of other things first. Have you done any tests? you say it has spark and fuel, but tell us how you know. Did you try a shot of starting fluid? (fuel at the fuel rail doesn't mean fuel to the cylinder and it doesn't mean you have enough pressure). Did you check your compression and timing? How did you check for spark? (pulling a new spark plug out of your tool box and checking spark doesn't mean the plugs in your motor are any good) Diagnostics are all about proving a theory, or proving parts are good/bad. If you have spark, fuel and air your truck should run, unless you have no/low compression. If you can't find a problem it doesn't hurt to replace wear items so you have known good parts like distributor cap, rotor, plugs. and while you are there check compression, spark and timing.
The reason there are several different ECUs is that there are different engines/transmissions and options. If you are sure you need an ECU, get the part number off of the ECU you wish to replace or call Toyota for help getting the correct part number.

muddpigg

iTrader: (1)

You said it was running and died on the interstate. So that being said I would do as AK said and do more diagnostic work.

I've had a bad wire in harness going to fuel pump that provided fuel at time but died others. When I checked the harness it had power but no enough to run pump. Took quite awhile to figure out and almost a tank of gas on the garage floor.

Otherwise you are likely to throw money and parts at it but not fix problems.

Drewandhis89Yota

Drewandhis89Yota

Also I should add more story. one day the afm died, so a friend of mine had an 88 Supra lying around and I took the afm out of that and threw it in. I know bad idea. It never really ran right and I was constantly having to tweak it. Back then I read all the threads on this and tried my best but it just never was right. So after a few days of that and looking on here to see if it was possible to make it run good with it, I gave up on that and was on my way to the junkyard to get a replacement afm. That is when the truck died. I got it towed home, I went to the junkyard to get proper afm, installed it, and nothing. Just crank crank. I tested the afm, everything was ok with that. That was 8 years ago..

Drewandhis89Yota

That is another reason I think ecu is fried, cause the Supra afm killed it lol

akwheeler

For $34 you are likely to get one that doesn't work. Most of the time if you burn out a control module it is right away, not a slow burn. and I doubt putting in an engine from a 90 into your 89 would burn it out anyway. same engine, no problem. When doing a used engine install I generally take all of the sensors and such (sometimes the entire intake) off of the original and install it on the donor so I know I have all of the correct components. NOTHING gets thrown away or sold until the job is done! Case in point, I took a 1999 Honda CRV that hit a moose and pulled the complete low mileage drivetrain out and put it in a high mileage/same year body, I found out that the EX and LX had different alternators, go figure.

akwheeler

AHA! now we get the rest of the story!

Drewandhis89Yota

So ecu sounds more correct now?

Drewandhis89Yota

use direct match for original truck?