CITY VARIO 2007 KNOCKING - calling all experts and owners

[pwuser150013678596]

Genuine halat may chahiye rpm

New throttle means new tp sensor and new iac valve and maf sensor, Already swapped and adjusted but nothing out of it.

Could it be the fuel pump?
Basically when fan of radiator turn on the vibration gets worse.

[rajaatta]

Syed you are facing a disturbed fuel mixture. I had studied the 2005 model civic it doesn't had o2 sensor so taking the stfu parameter is impossible.
So find someone who has wide band lambda meter and analyze the AFR at exausts port.
And the vibration appear at specific rpm do state it as well.
MISBALANCED fuel mixture is the main cause also take some compression test of all 4 cylindera.

[pwuser150013678596]

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Rpm is stable at rpm line below 1. Rpm needle does not fluctuate with vibration.

Vibration gets bad when radiator fan turns on.

[Xulfiqar]

isolate the engine of all vacuum users, like evap and brake booster, block those ports and see if the engine behaves properly. Sounds like you have a vacuum loss. It can also be from a bad engine with poor compression too.

[rajaatta]

Yes boss a poor compression of any cylinder would do the vibration kicking.

[pwuser150013678596]

Your posts show your upbringing.

You are hereby going to be ignored.

[pwuser150013678596]

If its the loss of compression from a cylinder do you recommend to rebuild this engine at 134000km or swap it?

The vibration is only at idle speed in neutral and park and only happens when ac is on and the fan turns on and off at intervals. Maybe its a weak ac compressor? Without ac the vibration is very minor.

Vibration is not as severe but gets annoying.

It is a recent problem. In 3S what do i need to tell the mechanics? To isolate engine from ac evaporator and brake? And see if vibrations continues at idle with fans on?

[Xulfiqar]

not ac evaporator - fuel evap system, usually AHMCL cars had them but they were blocked off

[pwuser150013678596]

Thanks man.

I just had my bonnet open to check oil cap and oil dip stick condition to check engine health.

With the bonnet open i sat in the car and noticed no vibrations. Turned out the adjuster rubber of bonnet was not properly holding the bonnet off from either side.
So had a few spare adjuster rubbers, installed them and vibration gone.

I will try to also get a compression test out of curiousity to check engine health.

Cant believe it was something so minor. The bonnet was basically moving and causing the car to vibrate as well. Accidentally found the fix.

Thanks once again @Xulfiqar bhai.

[flyingfeather]

imagine you were moments away from swapping the engine. Amazing fix

[Proverbial_Slang]

Please stop the personal attacks on public forums or the Mods will take punitive action.

[pwuser150013678596]

Moral : dont leave everything to pseudo mechanics.

[flyingfeather]

True

[Wingsman28]

Hello you talked sense bro, here I would like to ask you some stuff, I have a 2008 vario. 125k mileage. I have jerking issue with AC on in R mode. That too happens sometimes. Not always. But the jerks are like slipping of gear with a strange noise, I recently got complete 40k inspection done by 3S, change of CVTF and complete tuning etc. The problem still persists. The guy at 3S told me to get the valve body cleaned (was he making sense??)
If I go for valve body replacement would that be good? Can I find vario’s valve body at Honda 3S? Keeping in mind it’s an 11 years old model.
Pls keep in mind I am not planning to change engine and gear to VTEC as my this engine is really good with no issues. The RPM at idle are dead stable and smooth. The car has always been maintained by 3S.

[ahmedmanzar]

Guys, what was finally decided as the solution for this knocking problem in shifting to R or D while AC is turned on in idle state.

I have read the whole topic answers but could not get to the exact point of solution.

Reply is awaited.