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Grand Vitara low idle

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onlystunna
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Grand Vitara low idle

Postby onlystunna » March 19th, 2017, 12:33 pm

Good day all. I have been trying to find a solution some time now to a low idle issue i have been getting on my 2007 Grand Vitara. The vehicle idles low when the AC is off and more especially when it has more load for example when i turn the steering all one way. I tried several fuel injection servicing, changrd spark plugs and air filter and the basic tune ups such as cleaning the throttle body. It eventually reached a point a couple months ago when it actually would cut off but starts back easily.

What I did:

The cam sensor eventually read an error on diagnostics which i changed. This did not help and i ended up changing the crank sensor as well and a bad knock sensor found in the process.

The vehicle performance improved drastically after such work but the low idle issue was clearly still there. It was just a matter of time when it cut off on me again while reversing recently but didnt happen since then 2 weeks ago. I noticed a recent random stuttering as well when pulling off which wasnt very noticeable. I also noticed recently that while reversing, the fan came on and off every time the vehicle idled down on me. The only thing that regularly appears in any diagnostic i do but doesn't leave a check light which most mechanics tell me to ignore are 3 common errors saying ECM lost comm with BCM, TCM and ABS.

I have spent alot of money and continue to regularly service but Im afraid it will get to the point where it will stop again. Any ideas and contributions to solving this would be greatly appreciated.

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FullStop
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Re: Grand Vitara low idle

Postby FullStop » March 20th, 2017, 10:43 am

have you ever checked or replaced your fuel filter ?

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » March 20th, 2017, 11:21 am

FullStop wrote:have you ever checked or replaced your fuel filter ?

no never did... was never advised to do so. where is that located?

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FullStop
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Re: Grand Vitara low idle

Postby FullStop » March 20th, 2017, 6:38 pm

if there isnt one in the engine bay or under the vehicle, I dont recall seeing one under the grand vitaras, then the fuel pump housingwill most likely house the filter.

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » March 20th, 2017, 7:35 pm

ok will have that checked on my next service. strange that no one ever mentioned that as part of servicing the vehicle even after it reached the mileage it at now.

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megadoc1
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Re: Grand Vitara low idle

Postby megadoc1 » March 20th, 2017, 7:41 pm

Fuel pump? Maybe it's on the way out

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » March 21st, 2017, 12:51 am

megadoc1 wrote:Fuel pump? Maybe it's on the way out

How does one verify this? Im thinking some sort of fuel pressure test?

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » March 21st, 2017, 12:59 am

megadoc1 wrote:Fuel pump? Maybe it's on the way out

Correct me if im wrong but wouldnt a dying fuel pump affect the vehicle at high speeds etc. Presently I do not have any performance issues whilst the vehicle is in motion or accelerating.

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FullStop
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Re: Grand Vitara low idle

Postby FullStop » March 21st, 2017, 8:23 am

How was the throttle body serviced? ?Your issue sounds like a bad/dirty IAC valve(if equipped with cable throttle).

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » March 21st, 2017, 1:28 pm

FullStop wrote:How was the throttle body serviced? ?Your issue sounds like a bad/dirty IAC valve(if equipped with cable throttle).

It was taken out and sprayed with throttle body cleaner from both sides by one person while another person in the past used a screwdriver and pressed the valve a bit and cleaned as well. This throttle body is an electronic throttle.

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FullStop
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Re: Grand Vitara low idle

Postby FullStop » March 21st, 2017, 6:40 pm

I wonder if there's a idle air relearn that can be done. I don't remember one being on the grand vitaras, but then, my memory isn't stellar these days.

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onlystunna
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Re: Grand Vitara low idle

Postby onlystunna » Yesterday, 2:26 am

Will try that relearn tomorrow. I know for a fact my fuel economy etc resets itself while driving after the battery pole is removed for a bit. Not sure if thats the same but that itself never helped.

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