If you have a spare EFI intake housing for an 85-89 22RE and
you live in the Sacramento area can you help me out by loaning it to me to try and isolate a problem I am having. I actually only
need a few of the sensors that screw into the housing.

I have tried everything else and believe I have it isolated to these
few sensors but need to make sure.

I can come by and pick it up and will return it when finished.

Email me at Toyfamily@yahoo.com with your number and when
might be best to pick it up (Hopefully Sunday morning).

Thanks,

Jim

If it's on an old engine that's OK. The 2 main sensors that I need
to try are screwed in right up front. They can easily be removed
and put back. They are the water temp sensor and the start
injector timing sensor.

Jim

Can't you just do a resistance check on those 2 sensors to determine whether they're good or bad?

I did do a resistance check and even though they don't check out
of range the readings are suspicious. All other parts involved in
fuel injection sensing and control have been changed, replaced
new, or professionally tested. Without boring you with the history and details, I'm at a point now that I need to swap and
verifiy that the problem goes away before purchasing more new parts. Too many $$'s thrown into new parts to date already that
have not fixed the problem.

The FSM gives a good procedure for testing both of these sensors. The following is from the Toyota FSM for 86 model year

Start Injector Time Switch:
a) Disconnect connector
b) Measure resistance between each terminal

sta-stj 20-40 ohms when coolant below 86deg F
40-60 ohms above 104deg F
sta-ground 20-80 ohms all the time

The water temp sensor shows a chart of temp V resistance between two terminals. I can scan chart for you if you want - email me.

HTH

One last point - I chased an EFI problem for weeks that I finally cured by removing the connectors to the ECU, cleaning connectors with contact cleaner, and reconnecting.

Several weeks of tinkering, several hundred $ of professional troubleshooting, all solved in a few minutes by removing and reconnecting the ECU.

.....worth a try.

I should have those sensors if you need to borrow them. I could bring them by on Monday if you still need them by then. Let me know.

Jeff

Jeff,

I sent you an email with my phone number. If you're around
today I could drive up.

Thx,

Jim

Hey Alabamatoy,

Thanks for your reply. That's the procedure I used to test them
with an ohm meter and though not out of spec, I do get suspicious readings.

I just replaced my engine last week and while out I cleaned every
connector with connector spray as well as inserting/removing
each connector 5-6 times each after cleaning as an additional
measure to help scrap them clean. In addition, I did the same
to the connectors to the ECU box as well as changed the box
with a spare one.

You did get me thinking however about something. I am going to remove each connector and check to see if the female contacts are too loose. A little delicate surgery with a pair of needle nose
will help tighten them and rule out loose contacts also.

BTW, what was the problem you were chasing that got fixed by
cleaning the connectors?

Thanks for your time,

Jim

Originally posted by ToyFamily
BTW, what was the problem you were chasing that got fixed by cleaning the connectors?I was getting missing and sputtering at part throttle, and O2 sensor error code and sometimes TPS error code. High RPM or hard throttle would run OK, or idle would run OK.

The ECU connector cleanup fixed it....

Just got your voice mail, I don't have a spare hopusing laying around but Dan does ( chezypoof ) or at least he did when I bought a bunch of EFI spares from him. I just called and you were out but I'll try later.. I could come over tonight and you can pull any sensor off my rig you want to test with..

RJ

RJ,

I already called Dan and he got rid of all his EFI stuff when he sold his 4-rnr. Jeff from Weimar is going to loan me a couple
of his spare sensors to try. Thanks for the offer. Even though these are easy to get to on a running rig they do require draining the coolant.

See ya,

Jim

You can drain the coolant by disconnecting one of the lines on the throttlebody. I drained enough to fill a water bottle and pinched off the hose w/ a pair of Vise Grips. This allowed me to pull of those sensors w/o spilling any coolant.:)