Question about Toyota MR2
I have no high idle on a 94 Toyota Camry 4cyl. There seems to be a vacuum controlled diaphragm that looks like it's supposed to extend outward and increase the idle by pressing on a cam attached to the throttle body. However when started, the diaphragm sucks inward actually moving further away from the cam that it looks like it should be pressing on. Any ideas?
That diaphragm has nothing to do with it, it is working as it should. The problem is the idle air control (IAC) valve located on the bottom of the throttle body, it's a common problem they can stick in one position. the remedy is to remove the throttle body, then remove the IAC valve then clean the carbon deposits from both, use a can of carbon cleaner/air intake cleaner and a brush, be sure the movable part of the valve can be pushed open the close by itself to where there is about 2 mm gap when cold.
Posted on Sep 02, 2017
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Posted on Jan 02, 2017
1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue
Posted on Feb 21, 2009
SOURCE: 1997 Toyota Camry code P0171
ita a little black box with 5 wires plug, between air filter and throttle, but try to reset maybe was a momentany failure,disconnect the negative battery terminal few minutes
Posted on Apr 19, 2009
SOURCE: 94 Toyota Camry has rough idle.
try chem12 spray. Clean mas, then spray into intake manofold w/engine runnign at 2k rpm. Check for oil leak in spark plug recesses causes a miss that the computer picks up and tries to balance.Did this to my car. it works
Posted on Jun 01, 2009
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