开云体育

?

I know electronics and repaired my own ECU when it went bad.?

If the part number and model number of the ECU are not exactly the same there's something different with them and even though it may plug in it might not work properly-don't don't try it.?

I have downloaded many Toyota ECU schematics for pickups and my RV and compared them, if the part numbers are different that means it could be anything from a minor one pin call out difference to many pins different.?

There is only one way to know for sure if a different ECU model number will work would be to download the schematics for both units and compare them.

curious to know what sort of things fail in these computers.? burnt resistors, leaky caps etc.

--

rz

In my case it was a transistor pack going to the fuel solenoids causing one fuel solenoid to one cylinder to stay on all the time which flooded that cylinder and made my fuel tank empty real fast. I could still drive it but only at about 10-15 miles per hour.

I think I could have disconnected that cylinder and just tried to drive on 5 cylinders but at the time I didn't want to do that so I had to tow it home.

What could happen if you plug the wrong ECU in? I purchased my 87 about a year ago. Early on, in out 2700 mile trip home, I bought an ECU as a spare, from a wrecker. I plugged it in, and the truck started. That is as far as I went (i woould have to check the models numbers ... I dont recall).? If ever stuck, and I used it in a pinch, could I do harm? Or is the only concern that it wont work "properly"??

Re: Wrong ECU

?

If the "spare" ECU is similar enough that the connectors plug right in and you found it runs the engine, you are unlikely to do

any serious damage if you use it for a short time. The most likely scenarios is the engine will either run too lean, which will

give you terrible driveability and limited power, or it will run too rich which will give you horrid fuel economy and (over time)

damage your catalytic converter.

?

Please be aware swapping the ECU with one that isn't correct for the vehicle is technically a violation of federal law. But if

you don't live in an area where there is emissions testing, no one is going to give you grief about it.

?

I would recommend against using the spare ECU over the long term unless you verify it's the correct one for your engine.

While running with incorrect engine parameters is unlikely to cause problems in the short term, over time running with

incorrect fueling/timing/etc. could cause problems, especially when driving under heavy load.

?

Good luck,

?

Buzz L.

San Jose, CA

Former '86 Dolphin, '89 HiLux, and '96 Tacoma owner

?

?

Thanks Buzz.

?

Short term (emergency) use, is all I had planned for it. I just dug it out and double checked. The Toyota label cannot be read, so I won't be able to be sure what it is.?

Probably a good idea to have a spare ECU to try in an emergency. I also heard a long time ago that having a 22 RE coil igniter spare is a good idea so I just pulled one from a junkyard and keep it in the the 85 dolphin.

Thanks Pete. Is the coil igniter somewhat difficult to come by, if one were to need one? Or more a convenience to have, as they go out occasionally??

Aaron from CO