Question about 2003 Toyota Highlander
SOURCE: Engine knock
The idle issue is normal. The idle is controlled by the ECU. There are no adjustments for the idle. Regarding the knocking noise, that could be several things, and I am hesitant to comment without hearing it. Take it to a Toyota Dealer & have a tech listen to it. We are very good at identifying noises on the service drive.
Posted on Sep 09, 2008
Your A/C pressure switch may have gone bad or the wire harness to it may have gone bad. The switch is along the low pressure line or on the A/C Accumulator ( looks like a silver canister) , Unplug the wire and you can jump it there and see if the clutch comes on, if it does try spreading the two tabs apart on the switch and clipping the wire back on. If it does not come back on you need to replace the switch, you can do it with out loosing to much R134A. Just got to be quick when you remove the old one and placing the new one. The low side should have a reading of 30PSI to 50PSI and the high side should have 150PSI to 200PSI. Any other reading will give you poor A/C performance. Good luck and hope this helps.
Posted on Jun 23, 2009
SOURCE: Air conditioner doesn't run.
If your AC compressor is cycling constantly this is a sign of a low refrigerant level. The system will need to be inspected for any leaks, any leaks repaired, and the system charged to the proper level with refrigerant.
Posted on Jul 08, 2009
You might have a bad coil. Under a load the coil might preform well, but under no load, its weak causing a misfire...thus giving you a rough idle. I have had this problem on a few vehicle. Check plugs, wires, and distributor. Mike.
Posted on Sep 18, 2009
Yes, I just had the same problem and I cleaned it with STP throttle body and carb cleaner. Take off the air big air hose off of the throttle body. You will see a small hole on the lower right side. Put the spray nasal on your cleaner can. Stick the plastic nasal directly into the hold and spray it for about 7 seconds. Then take the nasal off of the can and stick it in the hole pushing it in and out for a few minutes. Then put nasal back on the can and spray for another 7 seconds. Now wait for 20 minutes. spray one last time for a few seconds and you are good to go. You will be shocked on how much better you echo will run. I almost spent 225.00 for a new idle control valve, man I sure am glad I did this. My car is running better now then when I first bought it. Good Luck !!
Posted on Apr 26, 2013
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