1. Home
  2. Toyota Trucks
  3. 1987 4x4 Pickup idling problem...

1987 4x4 Pickup idling problem...

Does anyone know what would cause an idle to be very low but it doesn't stall, just vibrates the crap out of you? The truck has a brand new 22RE motor but the idle isn't right. Does the idle screw on the intake(E.F.I.) have to be set a certain way? What about vacuum leaks, would'nt they throw-up an engine code? I noticed a white plastic screw thing with vacuum hoses plugged into it on top of the engine, does that maybe have to be set a certain amount of turns? All I know is everything on it is brand new but it still won't idle good at all. I didn't install the engine so I can't quarantee everything's plugged in properly but from the photos in my manual it sure looks it. Has anyone else had this problem? It's frustrating!

Reply to
Robbo
Loading thread data ...

Yes, you use that screw to adjust the idle to the proper RPM. Before doing that, check your Throttle Position Sensor, especially the IDL-E2 setting:

formatting link

No, not unless very severe to cause some other failure. Faced with similar problems, I opted to simply replace all the 19 year old vacuum lines on my '85 with a new silicone rubber set. Fixed lots of small problems and gained about

1 MPG in the process.

That is the idle-up valve, it only functions when you have A/C (if present) running or try turning the steering wheel at idle (assuming you have power steering). It boost the idle speed if any of those accessories are running and dragging down the engine idle speed.

New only means that the part is not old. Has no bearing on whether its a good part or whether it was installed and adjusted properly. Invest in a Factory Service Manual and some simple test tools and check them out yourself:

formatting link

-- Roger

Reply to
Roger Brown

You need a factory manual. The timing gets set first (this may be your problem), Then the fuel mix, then the idle screw should be able to be backed down to 750 rpm. Shit, if you're idling below 750, that's probably it.

Reply to
?reality

Thanks for the pointers people! Appreciate it!

Reply to
Robbo

I had a stuck open egr valve on my 88 'yota 22re-- It would idle very low, putt, sputter and shake the shifter like it was coming apart, replaced egr and now it runs perfect...

Reply to
toyota1

Hmmm, that's interesting since a plug was found in the vacuum line leading into the valve. It was removed to no avail though. I'm guessing someone somewhere was testing something and forgot to remove it or simply tried to bypass the valve altogether.

Reply to
Robbo

try operating your valve with a hand vacuum pump with the engine off.... i tried this and couldnt hear the valve moving so i pulled off the valve and thats when i found it stuck....

Reply to
toyota1

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.