Question about Honda Accord

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Normal idle rpm car

I have an accord 2006 model. i'm having a problem of vibration and it's very strong when ac is on. i have engine mountings changed, spark plugs and fuel filter changed but this didn't help. i was told that rpm is low - 600-700 whereas it should be 800-900. is it so? thanks a lot in advance.

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  • Honda Master
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Actually on an automatic transmission fit the engine revs should be 1000 rpm as on engaging a gear to drop in 850-900 rpm. As you stated the vibration is stronger on using the Air conditioning. If you do not have vibration when Air Con is not in use and the vibration comes with the ac in use means that either you have a problem with the ac pulley or bearing or the crank shaft pulley. Before you go for any repairs or removals,just do this to confirm: a) increase the revs to 1000rpm and put the AC on and check if the problem reduced or gone. b) run the engine and put it in gear and see whether you do have any vibration or not..c) Remove the alternator and power steering belt and just leave on the AC belt run the engine with the ac on as well and see whether you do have any vibration or not. After these and the result you will get proceed accordingly. Good Luck.

Posted on Apr 22, 2014

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  • Expert
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Dirty throttle body.

Posted on Apr 22, 2014

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Posted on Jan 02, 2017

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SOURCE: Help

I had the same problem and I found out that the battery was bad. since everything runs off the computer there wasnt enough juice to run both the car and the computer the jeep ran good after putting a new battery in it. so try this first before you spend a lot of money on a shop fix because they wont think about the battery being bad. they will want to replace everything but. hope this helps

Posted on Sep 15, 2008

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SOURCE: Idle drops really low then returns to normal afew times b4 cutout

my buddies 94 350 has been doing the same thing for years i think its in the computer i would say youll probably have to live with it

Posted on Mar 27, 2009

HondaAl
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SOURCE: oil around spark plugs on 1992 honda accord

Yes the oil can cause the car to lose spark, the oil leak could be caused by the valve cover gaskets around the spark openings, but 9 times out of 10 it is the spark plug tube "O" rings. The top of the valve train comes off of the head, the "O" rings are between the two halves, that will fix the oil leak.

Posted on Apr 22, 2009

stevenhurc
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SOURCE: daewoo matiz SA- year 2001, india done 39000kms

check cylinder compressions wet and dry
any difference of about 25PSI is enough to warrant engine repairs
sounds like plug might be fouling up with oil
ring problem?

Posted on Jun 21, 2009

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SOURCE: Vibration problems in 1kz te

Check calibration. Muffler supports from the front till the back, there should be proper clearance. Is your diesel fuel of proper cetane rating for the engine? Check your belt drive system, is there any part that is excessively draining engine power, power steering pump, air con compressor, alternator or generator? Do these preliminary steps and isolate.

Posted on Nov 29, 2009

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Ill answer in the generic and for GAS engines. only.
that is illegal RPM, the ECU regulates it to 800 all the time
that means the ECU can not regulate the RPM now, for many reasons.
and sure it vibrates too low, that is normal for all 4cylinders to do that.
no bad engine mounts never lower RPM to 600, ever.
they dont control idle speed at all.
the #1 reason for most cars to idle too low are:
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I'm not sure exactly which vehicle you have so I'll try to be genera yet as specific as possible to help you determine the problem. I'm assuming here its a Gas Fuel engine.

1.) if its a carburetor type engine, You may need to adjust the RPM to increase or lower the Idle. Its commonly called the Ideal screw and adjust the air fuel ratio to stabilize the engine fuel mixture to increase the RPM.. its found on the Carburetor.

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if it has a distributor , you can turn the distributor as well to adjust the RPM.


rough idling is usually caused by Mounts, since you changed yours the next most likely issue is the RPM itself or idling speed / rpm. If its to low you ill have that issue.

other possible cause is the distributor points (if any).. bad plugs, bad plug wires.. but those cause other issues while driving as well.

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1) It is very possible your engine mounts can be worn, but

2) the vibration you feel may be also due to the idle itself degrading to the point that the car is shaking. Does the engine sound like it is getting ready to die? what is the engine rpm when you feel the vibration? You may just have a dirty throttle body. In this case, clean the throttle body plate and bore and the problem will go away.

3) did the problem seem to come on suddenly or gradually, if gradually, you may just need some plugs and/or wires, and/or cap/ignition rotor, etc. (a tune up)

4) Also, do you only feel the vibration when the AC system is on?

5) there are some other reasons for abnormal engine vibration at idle, but the above are some of the most common, and simpler to repair.

All the best with the repair!

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