andres4runner
New member
i did the sensor ,throttle,- i did the maf .its clean...its not sticking.it idles high.and varies....the throttle body is not sticking,.should i try and clean the underside of the throttle body.CAN ANYONE HELP.
98 4 runner ,crazy idle
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infantry503
New member
Have you replaced the IAC? My runner had a stupid high idle when I first got it, I replaced the IAC, cleaned the throttle body, and replaced the MAF and the idle went down.
Kanoe
New member
Cleaning the throttle body on the truck is a good way to flush gunk down into the IAC. Not saying you did that, just FYI.
gamefreakgc
Elite Member
Take the throttle body off the vehicle to access the IAC (including the coolant lines). It's held on by four phillips screws. Once open, you see the "barrel" looking valve at one end, that's what you want to clean out. Use MAF cleaner so it evaporates quickly and spray the heck out of it. Gently rotate it, GENTLY to make sure it's not sticking. You might also want to pick up a new IAC gasket from a parts store while you are at it to make sure it doesn't leak when you put it back together, since the gasket is all that separates your coolant from your air intake.
Not a hard job but can save you a pretty penny. Brand new an IAC valve costs $200+.
andres4runner
New member
im gonna clean it out,i had it unconnected it moved freely.too cold for now,but will do it soon
gamefreakgc
Elite Member
Only other thing I could think of is the that throttle valve or "butterfly valve" in the throttle body is warped and not shutting the throttle as much as it should. Very rare but has happened before.
andres4runner
New member
its the butterfly sticking,now what.smooth it out ,spacer,?????it wont return to idle completely with out being pushed
andres4runner
New member
it seems to stick from idle after,you touch gas pedal.wont return.i cleaned out the whole throttle body ,it was actually clean ,i did it anyhow.i think its the butterfly sticking////thank s guys for the help.i appreciate it.
gamefreakgc
Elite Member
Drop a TINY amount of general purpose oil in the hinges on both sides (engine oil will work in a pinch too). You might have to take the throttle body off again, since you have to apply it on the inside of the throttle body. Work the oil in by opening and closing the valve, might need a second drop of each side. WD40 is not the same, it does not have good lubrication properties.
Give that a try and see if it helps. I had to do the same on my old Toyota once.
andres4runner
New member
awesome thanks .i will try when its above 5 degrees out.
andres4runner
New member
crazy idle
ok guys I did maf twice,first one snapped in half..still high idle, but lower a couple hundred rpm,s...the readout says mas air flow sensor circuit malfunction... again or still......fuel system too lean????intake air temp sensor malfunction...but it don't have intake sensor...ANY IDEAS...
ok guys I did maf twice,first one snapped in half..still high idle, but lower a couple hundred rpm,s...the readout says mas air flow sensor circuit malfunction... again or still......fuel system too lean????intake air temp sensor malfunction...but it don't have intake sensor...ANY IDEAS...
Kanoe
New member
Isn't the intake air temp sensor the one plugged into the side of your air filter box? Pretty sure that is where it is on the 3rz at least. I assume the v6 has one there too.
andres4runner
New member
whats I a c
Volsfan1976
New member
I have a 98 v6 auto 4Runner. It got to where when I would start it it would start right up every time and almost immediately die. Would start right back up and die again. Ended up replacing the iac. Now will start up and idle fine. Runs fine. But the issue I am having is lair example when I come to a stop sign it acts as if it shifts itself into neutral. I go to pull out it just revs up and when when the Rome start to come down it's like it shifts into drive. Seems to be really bad when shifting into reverse. Will eventually go into gear but I'm afraid this will eventually ruin my transmission. Never done this till I replaced the iac. Could the iac be bad maybe and causing this. Like I said runs fine just when I come to a stop will it do this. Thanks for any input.
andres4runner
New member
I did everthing,,I mean all of it.the throttle will go down,if I push it it wont return all the way.i lubed it.still high idle
andres4runner
New member
crazy idle
still got the idle high.i shimmed the spring pack...its still high..my thought is the butterfly has no clearance,should there be space,its tight ,may be sticking..i could see rub marks,i gently fine sanded it ,,no change,,,,should I try more sanding...ORcan I replace with a universal 80 mm throttle bodyUniversal Aluminum Silver 80MM Throttle Body Intake Manifold 1JZGTE 2JZGTE 2JZGE, by fastwayracer...any one do this.
still got the idle high.i shimmed the spring pack...its still high..my thought is the butterfly has no clearance,should there be space,its tight ,may be sticking..i could see rub marks,i gently fine sanded it ,,no change,,,,should I try more sanding...ORcan I replace with a universal 80 mm throttle bodyUniversal Aluminum Silver 80MM Throttle Body Intake Manifold 1JZGTE 2JZGTE 2JZGE, by fastwayracer...any one do this.
spartacus
Senior Member
(did the sensor? ) meaning tps (throttle position sensor). check the resistance between the terminals it should be 1.2 k ohms - 3.2k ohms at 68 degrees per the fsm.
andres4runner
New member
junkyard wont sell one
