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1990 Toyota Corolla Idle Speed

Tiny
JACKOLSON
  • MEMBER
  • 1990 TOYOTA COROLLA
1990 Toyota Corolla

What are the disadvantages of setting the idle speed above the recommended rpm, let's say recommended rpm is 800rpm, and then I set it to 1000rpm.

Am I damaging the engine or am I just wasting gas?

What are the advantages on the other hand?

The engine is a carb engine.

Thanks!
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Sunday, March 14th, 2010 AT 8:44 AM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
You will run the engine leaner and overtime it will damage engine.
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Tuesday, March 16th, 2010 AT 9:32 AM
Tiny
JACKOLSON
  • MEMBER
  • 67 POSTS
Why would it run leaner?

And if I set my idle at best torque @ partial throttle, then I sometimes drive it at wide open throttle, will that damage the engine?

When you step on the gas, increasing the rpm will make the engine run leaner or richer?

Thanks!
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Wednesday, March 17th, 2010 AT 6:20 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
If you let more air in it will lean mixture, the older cars with a one wire sensor can compensate to some degree, but it takes them much longer.

If an auto, you are putting an addition strain on bands and clutches.
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Friday, March 19th, 2010 AT 7:13 AM

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