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1 D4D common rail injection system on Wed Jul 20, 2011 4:27 am

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HOW TO KNOW WHAT THE PROBLEM WHEN YOUR D4D EXPERIENCING ROUGH IDLING OR EXCESSIVE ENGINE VIBRATIONS

Malfunction

*Rough idling or juddering due to abnormal
combustion
* Juddering when vehicle starting due to
clutch system malfunctions
*

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2 Re: D4D common rail injection system on Wed Jul 20, 2011 11:27 am

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Main trouble areas

(a) Injector malfunctions
* Injector piston movement malfunction
* Injector stuck closed
* Injector stuck open
* Deposit in injector
* Malfunctions in injector circuit
(b) Clutch system malfunctions
* Clutch system (juddering when vehicle
starting)

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3 Re: D4D common rail injection system on Wed Jul 20, 2011 11:29 am

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Related Trouble Areas

* Injector compensation code
* Fuel leak
* Engine mounting insulator
* Intake air system leakage
* Intake air system blockage
* EGR system
* Intake shutter system
* Mass air flow meter
* Supply pump
* Pressure discharge valve
* Fuel pressure sensor
* EDU (If P0200 set simultaneously)
* Low quality fuel
* Vehicle modifications
* ECM

INSPECTION PROCEDURE
HINT:
Before troubleshooting, conduct the following in accordance with the respective BASIC INSPECTIONs
instructed each repair manual.
(a) Check the fuel quality.
(b) Check the fuel for air.
(c) Check the fuel system for blockages.
(d) Check the air filter.
(e) Check the engine oil.
(f) Check the engine coolant.
(g) Check the engine idling speed and the maximum engine speed.
(h) Check the vacuum pump.

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4 Re: D4D common rail injection system on Wed Jul 20, 2011 12:52 pm

Got a question sir ? How can I solve my sound/buzzing/noisy sound issue? every time I hit and cruise 130Km/h on my hillux?
Thanks Smile

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5 Re: D4D common rail injection system on Wed Jul 20, 2011 2:16 pm

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is the buzzing sound coming from the engine? I prefer that that buzzing sound is coming from your tire.. in that speed tire that is spinning at high speed will create a noise.. if the sounds are off during idle or normal speed i suggest it is coming from your wheels.. it is may be that your tire is protruded outside, or an oversize one, or it has a big grooves..that mostly the the sound of an air passing through your tires.. Shocked

Or worst if there's a humming sound.. its your wheel hub bearing that will be needed to be replaced or to be repack..

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