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Toyota Corolla, unstable idle

Tiny
MARIOC68
  • MEMBER
  • 1995 TOYOTA COROLLA
  • 262,000 MILES
Hi,
excuse me.
Lately notice these symptoms:
(1) In addition to the erratic behavior of the needle 2 to 3 inches of mercury vacuum gauge.
(2) I've noticed an engine idle unstable and as indicated above with small explosions in the exhaust.
(3) By the way, I checked with a role in the escape, and it sucks.
(4) noise in the valves, as click click.

IAC valve is clean.
Throttle body cleaned.
Still the problem persists.

You may need an adjustment of valve clearance?
should do a compression test on the cylinders?
These symptoms may lead to think there's any burnt valve?
Finally, these symptoms lead to knock / detonation or pinging of the engine?
I would appreciate any suggestions as possible.
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Friday, April 20th, 2012 AT 7:06 PM

17 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Make sure the IAC is working and cjeck for vacuum leaks. Check ignition timing too.
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Friday, April 20th, 2012 AT 7:11 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
The ignition timing is right, 10 degrees BTDC.
The IAC valve is working properly.
How to check vacuum leaks?
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Friday, April 20th, 2012 AT 9:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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For vacuum leaks, go to our homepage under the DIY section for directions.
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Saturday, April 21st, 2012 AT 9:44 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
Vacuum leak may exist for o-ring distributor?

I have oil leaking there, I removed the distributor and noticed that the o-ring is dry and very worn.
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Tuesday, April 24th, 2012 AT 6:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Start there. Replace the o-ring so there are no leaks. Make sure to check around the intake manifold and throttle body.
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Tuesday, April 24th, 2012 AT 7:21 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
I changed the o-ring, then took the opportunity to check valve clearance, one of them (intake) is 0.13mm (0.005 inches), the nominal 0.15mm - 0.25mm, I'm looking for a new fit.
This may produce the sound tick, tick on the valves?
Some other effect on the operation of the car?
After adjusting the clearance valves, and proves the car them to comment.
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Wednesday, April 25th, 2012 AT 2:42 AM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
Now adjusted the gap between valves, it disappeared with the noise of the valves. Vacuum leaks'm still looking for the intake manifold area hear a sound like something to suck, aunh can not identify its source.
I can use WD-40 to locate the vacuum leak?
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Thursday, April 26th, 2012 AT 12:54 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
The ignition timing, so I did personally, to buy a lamp estrevoscà pica it.
Initially allow the engine to warm up.
I did a jumper on terminals TE1 and E1 of the diagnostic connector.
Connect estreboscopio the spark plug wire 1 and regulate it at 10 ° AMPS moving the distributor.
Then I removed the bridge.
I went back to check the ignition timing, this time indicates 20 ° BTDC approx.

Something I did wrong? I followed as described in the service manual of the car.
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Thursday, May 17th, 2012 AT 1:11 AM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
Hello
This time I meet a problem that arose recently. Spark knock during acceleration and only when the engine temperature taken.
I tried holding back on 2 ° less, ie 10 ° initial stayed in 8, even so the problem psyche.
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Saturday, July 7th, 2012 AT 9:23 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
My car despite having corrected ignition timing, even spark snock. Have something to do with the fuel pressure?
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Monday, March 25th, 2013 AT 9:08 AM
Tiny
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  • MECHANIC
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It wouldn't hurt to check the fuel pressure. However, usually it is ignition timing, bad fuel, or a knock sensor.
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Monday, March 25th, 2013 AT 8:40 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
However, setting correct ignition timing for this vehicle model (Totota corolla 1995, 5A-FE engine)? As I described earlier.
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Wednesday, March 27th, 2013 AT 6:28 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
Do the following:
I disconnected the sensor and the engine IAC valve pistonea no longer accelerating, but the idle is high, what happens, valve may be responsible for the knock?

Thanks
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Saturday, March 30th, 2013 AT 4:16 PM
Tiny
MARIOC68
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  • 120 POSTS
How I can check the knock sensor for this model vehicle?
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Saturday, April 6th, 2013 AT 8:00 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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You have to check if there is power to it.
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Friday, August 9th, 2013 AT 1:49 PM
Tiny
MARIOC68
  • MEMBER
  • 120 POSTS
No normal power before. Maybe the engine needs compression check.
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Friday, August 9th, 2013 AT 3:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi:

As I was reading through the posts we submitted, it's funny, but I was thinking you should check engine compression. With that many miles, it just may be worn to a point that it lost power.
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Saturday, August 10th, 2013 AT 7:27 PM

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