Technical Help (by Mitsuguy and ArmyofOne)
Last edited by PHASHAC; Jul 13, 2011 at 04:15 PM.
Any Help is greatly apprecitated!
Celebrating Lexus & Toyota from Around the Globe
Any Help is greatly apprecitated!
may also have a cam/crank sensor issue...
unfortunately thats not an easy one to diagnose...
catalytic converters have no moving parts, what type of noise does it make? does it sound like an exhaust leak? chances are, if so, that it was not welded in properly... not sure what other noise one would make?
bucking under deceleration... thats always a tough one to diagnose... with that mileage, it could be carbon deposits in the engine that should be cleaned out (google seafoam treatment), could be spark plugs / wires, though typically not on full deceleration... I would look for vacuum leaks around the engine, as this can also be a factor... last two things could be a throttle plate not completely closing and/or a idle motor not working perfectly...
I cleaned the Mas Air Flow sensor. And went ahead and swapped out the engine filter. But it still idles rough.
My old 2001 RX300 had a IACV. And I cleaned every once and awhile. Does the 2007 RX have one? Or a electronic throttle by wire throttle body ?
Thanks
I cleaned the Mas Air Flow sensor. And went ahead and swapped out the engine filter. But it still idles rough.
My old 2001 RX300 had a IACV. And I cleaned every once and awhile. Does the 2007 RX have one? Or a electronic throttle by wire throttle body ?
Thanks
If you want to do some more yourself though, first thing I would ask would be what do you mean by rough idle... by rough do you mean you feel vibration in the car at idle, or do you mean that the idle surges up and down... if its a vibration, but no engine light, it might be a motor mount... if it surges, most likely carbon on the throttle plate...
On the idle. It surges. Sitting at a red light. You can see the Tach drop 800 to 600. And the Air Conditioning fan output will drop off. Then come back. Or some times it just stays at 600. And the car hesitates when you take off.
On driving down the street. You can tell it doesn't have the power. Before if you stepped on it hard it would just go. Now when you step on it. It revs up high. But at the first transmission gear change. Settles down.
On cleaning the carbon on the throttle plate. Is that the same as cleaning the IACV on the older RXs? How do you get access?
So with the last of my CRC MAF cleaner. I pulled off one of the tubes going to the intake. And sprayed the inside of engine intake down. After I go it started you could tell the difference. Idle was higher. And didn't surge sitting at the red light.
This afternoon I picked up a can of Sea Foam. And with my kid pushing on the accelerator. I sprayed the engine again. We took it out to the highway. And you could tell the difference right away. It starts on the first attempt. Doesn't surge any more. And my power was back.
Thanks again for all the help. Looks like im going to be adding cleaning my intake to my regular maintenance schedule.
Thanks for all the help. Saved me a trip to the dealer.
Last edited by MC5Wes; Aug 20, 2011 at 03:21 PM. Reason: More Info










