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1997 Toyota Camry engine sound

Tiny
BOBBRAT
  • MEMBER
  • 1997 TOYOTA CAMRY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 195,000 MILES
After I drove my car I parked it for an hour and when I started it, it ran really rough. It wanted to surge forward and it sounded like an old 70’s beater car, making a, "bump a bump a bump a bump" sound.

I took it to the shop and the engine scan had PO305, engine misfire and PO135, faulty bank 1 O2 sensor heat failure. Their road test had no engine problem and they replaced an O2 sensor.

When I got it back it ran fine a few days. Yesterday, after I drove it somewhere I got in to start it and the engine sound and vibration came back. I drove it home about 5 miles and it seemed as if it didn’t have much power. This morning I started it and it was fine.
So it seems to happen once the engine is warmed up. The engine is a 1MZ-FE.

Could it be the IAC valve?

Thanks
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Tuesday, March 17th, 2009 AT 10:22 AM

3 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok I would check the spark plug and plug wire to number 5 cylinder as that is what the P0305 code is it is a number 5 cylinder missfire why is it missfiring? This is what we need to find out. So if you have a digital multi meter we can run a couple of test to see if we can figure that out.
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Tuesday, March 17th, 2009 AT 10:57 AM
Tiny
BOBBRAT
  • MEMBER
  • 3 POSTS
I have a digital multi meter what tests would you like me to do?
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Tuesday, March 17th, 2009 AT 11:25 AM
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok first off I would like you to pull off the number 5 spark plug wire and measure the amount of resistance in ohms. It should not be over 25000 ohms.
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Wednesday, March 18th, 2009 AT 10:12 AM

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