Shakes violently at IDLE

Tiny
HONDADX
  • MEMBER
  • 1999 HONDA CIVIC
  • 170,000 MILES
I cleaned my 99civic throttle body yesterday went to turn the car on ran fine took it out to test it and when I would come to a stop or idle it shakes very violently. Would appreciated any info or answers from you guys thanks!
Friday, July 6th, 2012 AT 8:31 AM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Make sure your air duct is hooked up properly and all electrical connections are hooked up. See if you have knocked a vacuum line off someplace.
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Friday, July 6th, 2012 AT 12:28 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
What is the idling speed after warming up?

Did you try adjusting the idle speed?
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Friday, July 6th, 2012 AT 1:40 PM
Tiny
HONDADX
  • MEMBER
  • 46 POSTS
Where is the idle speed located or is that? There was some screw on top of the or side of the throttle body I took it off and put it back I dont know if its suppose to be tighten to specification. Will check all the vacuum lines tomorrow and keep you guys updated. THANKS ALOT!
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Saturday, July 7th, 2012 AT 7:31 AM
Tiny
HONDADX
  • MEMBER
  • 46 POSTS
Ok did some research and found out that I have to adjust the idle screw like you said KHLow. Thanks but do you know where I can find the right specs for it?
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Saturday, July 7th, 2012 AT 8:00 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There are 6 different engines and you need to know which it is. Most are in the 700-800 rpm range though
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Saturday, July 7th, 2012 AT 3:25 PM
Tiny
HONDADX
  • MEMBER
  • 46 POSTS
Thanks man I have a D16y7 tranny and engine. Where can I go beyond to finding the right specs for it?
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Saturday, July 7th, 2012 AT 7:58 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
IDLE� SPEED� (CIVIC� D16Y8� A/T� &� D16Y7� A/T� ENGINES)

NOTE: Manufacturer� recommends� using� an� OBD II� scan� tool� to� check� and� adjust� idle� speed.� If� an� OBD II� scan� tool� is� not� available, � use� the� following� procedures.

Step� "A"

1. Ensure� IAC� valve� is� connected.� Ensure� MIL� has� not� indicated� a� fault, � timing� is� correct, � spark� plugs� and� air� cleaner� are� okay, � and� PCV� system� is� operating� properly.� Connect� tachometer.
2. Set� parking� brake.� Start� engine� and� run� at� 3000� RPM� with� no� electrical� loads� (headlights, � blower� motor, � rear� defogger, � A/C� and� cooling� fan� off)� and� transmission� in� Park� or� Neutral.� When� radiator� cooling� fan
comes� on, � allow� engine� to� idle.� Check� idle� speed� with� no� electrical� loads.� See IDLE� SPEED� SPECIFICATIONS� (CIVIC� D16Y8� A/T� &� D16Y7� A/T� ENGINES)� table.
3. If� idle� speed� is� as� specified, � go� to STEP� "B".� If� idle� speed� is� not� as� specified, � remove� idle� adjusting� screw� cap� located� on� top� of� throttle� body.� If� air� cleaner� is� removed� to� gain� access� to� adjusting� screw, � DO
NOT� disconnect� Intake� Air� Temperature� (IAT)� sensor� valve� 2 pin� connector.� Turn� idle� adjusting� screw� in� 1/2� turn� increments, � until� idle� speed� is� as� specified.� See IDLE� SPEED� SPECIFICATIONS� (CIVIC
D16Y8� A/T� &� D16Y7� A/T� ENGINES)� table.� Recheck� idle� speed� after� each� 1/2� turn.� After� adjustment, � go� to STEP� "B".

Step� "B"

Allow� engine� to� idle� with� blower� motor� on� high� speed� and� A/C� on.� Check� engine� idle� speed� after� one� minute.� DO� NOT� adjust� idle� speed� with� A/C� on.� If� idle� speed� is� not� as� specified, � go� to� TROUBLE� SHOOTING
NO� CODES� article.

IDLE� SPEED� SPECIFICATIONS� (CIVIC� D16Y8� A/T� &� D16Y7� A/T� ENGINES)
Application� RPM Step� "A"� RPM Step� "B"� RPM
D16Y7� A/T� &� D16Y8� A/T (1) 650 750 760 860
D16Y7� M/T (1) 620 720 760 860
D16Y7� &� D16Y8 (2) 700 800 760 860
(1) Specification� for� USA� models.

(2) Specification� for� Canadian� models.
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Saturday, July 7th, 2012 AT 10:40 PM

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