Why is my Toyota Highlanders Engine Knocking/pinning and other.

Tiny
RUSSEL
  • 2006 TOYOTA HIGHLANDER
  • 80,000 MILES

I bought my Highlander/Kluger MCU26R with a 3MZ-FE V6 Engine 3 years ago. It had 18.500 km on the clock. Soon After I found out that the engine starts pinning when it reaches normal operating temperature even though the car has been filled up with 98 octane fuel. Then I noticed that there are problems in Shifting gears. For example the engine is chasing 1st gear when the speed is under 20kp/h, also erratic shifting. No trouble codes ever come up. The Engine light also never shows up. The MAF and OCV voltage supply and output voltages is OK. Only ETPS (throttle) maximum opening angle is 49% when the accelerator pedal is to the floor. The ETPS (throttle) has been replaced but the problem is still there. Engine pinning, erratically shifts gear, well under power. Lately more problems appear like these ones: When the car is parked for about 10-60 minutes the temperature is almost cold the car cranks and it almost starts but then is stalls. Only from the 2nd time does the car start properly. Please do you know what the problem is and how to fix it? Any help will be appreciated!

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Sunday, September 25th, 2011 AT 2:53 PM

7 Replies

Tiny
RASMATAZ
  • MEMBER

Check the fuel pressure with a fuel pressure tester if its within specs -start here

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Sunday, September 25th, 2011 AT 3:46 PM
Tiny
RUSSEL
  • MEMBER

Thanks I'll try that.

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Wednesday, October 5th, 2011 AT 7:58 AM
Tiny
RUSSEL
  • MEMBER

Hi rasmataz, I also wanted to mention that I can't hear the fuel pump at all. I was planning to change my fuel filter because of the mileage. So I was thinking whilst I am in that area I want to check on the fuel pump.

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Wednesday, October 5th, 2011 AT 11:52 AM
Tiny
RASMATAZ
  • MEMBER

Power the fuel pump direct from the battery and see if it turns on this way-let me know

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Wednesday, October 5th, 2011 AT 6:23 PM
Tiny
RUSSEL
  • MEMBER

But the Fuel Pump does work because the car does run I just can't hear it. Also the Circuit Opening Relay is cold all the time. I took the Fuel Circuit Opening relay out and I turned on the engine and in about 2 seconds the engine stalled.

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Thursday, October 6th, 2011 AT 11:40 AM
Tiny
RASMATAZ
  • MEMBER

Test the EFI relay

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Thursday, October 6th, 2011 AT 9:11 PM
Tiny
RUSSEL
  • MEMBER

Sorry for not replying for a long time. I checked the fuel pressure and its stable and normal. Thinking mite be computer.

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Tuesday, October 25th, 2011 AT 10:13 AM

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