Diesel eratic idle speed

Submitted: Tuesday, Jan 19, 2010 at 10:02

ThreadID: 75323 Views:3607 Replies:3 FollowUps:5

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Microlon Australia

Hi all,
My van is a 2005 Kia Pregio 2.7L diesel with around 60,000 Km.
When cold the idle speed is low (500 rpm) when warm it is around 750 to 800 rpm.
Also when warn sometimes the idle speed drops very slowly down to +/-550 rpm.
I then put my foot gently on the accelerator and keep it in the same position, the engine runs a bit faster and then the rpm go up around 300 revs with the accelerator still in the same position.
Apart from that the van goes well and burns 8.7 L / 100 Km on long runs.
Does anyone have a solution for this annoying problem?

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Reply By: Wayne (NSW) - Tuesday, Jan 19, 2010 at 10:27

Tuesday, Jan 19, 2010 at 10:27

Does the vehicle have the air con on or climate control fitted.

This could explain why when cold, the air con is off and the rpm is low 500 RPM.

When it is warm the air con is on and the rpm is higher. The variation in rpm could be the air con cutting in and out.

Wayne

AnswerID: 400149

Follow Up By: Microlon Australia - Tuesday, Jan 19, 2010 at 21:39

Tuesday, Jan 19, 2010 at 21:39

Thanks, I do not use the air con.

FollowupID: 669365

Reply By: Member - Tour Boy ( Bundy QLD) - Tuesday, Jan 19, 2010 at 10:28

Tuesday, Jan 19, 2010 at 10:28

Maybe a pump air leak or worn valve or even something as simple as a vacuum leak.
It's 5 years old maybe time to trade it in anyway if it's used for business.

Cheers
Dave

Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
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Had 72 cruisers in my time

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AnswerID: 400150

Follow Up By: Microlon Australia - Tuesday, Jan 19, 2010 at 21:41

Tuesday, Jan 19, 2010 at 21:41

Thanks, I will investigate.
Not about to trade it in, only 60,000 Km

FollowupID: 669366

Reply By: Alloy c/t - Tuesday, Jan 19, 2010 at 10:35

Tuesday, Jan 19, 2010 at 10:35

Probably caused by the additives you put into the fuel tank and into your oil.

AnswerID: 400153

Follow Up By: Microlon Australia - Tuesday, Jan 19, 2010 at 21:51

Tuesday, Jan 19, 2010 at 21:51

Thanks,
If you have not tried it yourself don't knock it, your way of thinking is most likely based on unsubstantiated rumors.
Many drivers come back for more.

FollowupID: 669367

Follow Up By: Alloy c/t - Tuesday, Jan 19, 2010 at 23:00

Tuesday, Jan 19, 2010 at 23:00

No substantiated proof that the snake oil you sell works either ,,just for once be truthfull and admit that the Only reason you put up the query about your vehicles problem was to push your snake oil product back into the forum ..

FollowupID: 669388