hi everybody. i know im a newbie on this forum but i need your guys help!.

alright well i have a 92 toyota pickup that had a blown 22re in it. i bought a 22re out of an 88 and put it in. now that its in im having a huge idle problem. after driving on the freeway itll idle around 4K rpm. but then once cools it goes from 1800-2000ish then back down to maybe 700 and back up again.

my questions are? is this a TPS problem? im using the TPS from the 92 becasue the connectors for the 92 didnt fit the 88 sensor. also im using a 92 ECU . is that a problem since the injectors have diff part numbers? and what MAF/ AFM should i be using? should i be using the one for the 88 or one for a 92? thanks everybody for the help!

 

look up 4CrawlR web site and ask him. he invented the TPS, i think. i guessing a sensor, or maybe the TPS. have you checked the vacuum hoses and their routing.

 

i prob would have used a 22re from a 92 as well. depending on where you are your gonna have complications when it comes to smog time. here in nevada the engine you drop in cannot be older than the vehicle year

 

The least complicated way to do the engine swap is use the 88 longblock and nothing else from it. Otherwise, you open a pandora's box if you mix and match sensors, controllers, etc. :-( If you can get all the 92 parts back on, including the plenum airflow sensor etc, you should not have any trubble.

 

I hope you don't live in any state with smog laws ! If your using a 88 motor then use the 88 computer sensors and all that comes with it. If you want to mix em, strip the motor down to a longblock then put your 92 intake and the rest of the 92 stuff on so you can pass some sort of smog test and idle like a champ.

 

What intake are you using? They changed the idle up unit in 89. The fluid runs right into under the throttle body in 89 and up. In 88 they had a remote type unit that bolted under the throttle body. If you put all the 92 stuff on the 88 block then you should be fine. The engines are the same. I would say you are having a coolent problem causing the idle up plunger to not work right. Make sure you run the engine with the rad cap off until the thermostat opens and all the air is out.

 

You should be fine as long as you kept the following from the 1992:
The intake system including injectors, tps, TB, etc.
The 1992 knock sensor.

I seriously doubt inspection stations will know the difference unless they can track casting numbers.

You need to do the complete tune up - set the TPS, do the timing, and properly set your idle. If you've done this, post again.

 

im using a 88 intake manifold. i was told they are exactly the same. the tps was set and i even unplugged it and it did the same problem. timing is set and the idle was set. its a LIL high when its cold but then as soon as its running its OUT of control

 

oh and also. the motor i got i was told was a bolt in affair and nothing different. after i bought it his cell number doenst work or something.... haha. also. i couldnt just use the short block because the head was cracked on the 92.

 

Sounds like once it comes out of closed loop you have problems. This may be related to the AFM temperature sensor? Do a meter check on the AFM.

 

The intake manifolds are actually different. The later manifold, upper plenum, notice that it's straight rather than angled at the throttle body. Physically, there is no harm in using the earlier manifold. The late model plenum flows better.

I believe the setup of the coolant flow through the TB and the associated fast idle setup is different between the two, but I don't have them in front of me.


The thing that WILL screw you up is the injector impedance. I'm 90% certain that the late model trucks use high impedance injectors and the pre 1988.5 trucks use low impedance injectors with a resistor box in the harness...
This will cause a big problem and may even damage your ECU injector drivers.
You *must* use the injectors that came with your truck.
I'd stick with the OEM AFM also.

 

Lots of good stuff here!