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Old 3rd August 2014, 09:09   #1
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Default Chevrolet Sail Diesel - Performance issues

Hello Guru's,

There has been this silly problem with my Chevrolet Sail Diesel, Firstly the engine was underpowered, no matter what I did the car didn't rev above 3000 RPM ( Both in idle as well as running) and didn't go north of 100KMPH and if I insisted there was this white smoke, which really scared me. But while investigating at Chevrolet ASS, the culprit was found to be a rubber hose which helps in creating vacuum for the turbo. It was replaced under warranty and thus the pick up was restored and the engine was roaring again. I am satisfied with the performance though, but while testing the vehicle on highway, I tried to rev the engine and see if the car goes north of 100KMPH, but to my dismay the car didn't cross 120KMPH and around 120KMPH the car starts shivering ( the engine I mean) and the power throw was in cycle ( for few seconds it shot and then started shivering and this cycle repeated).

Please Help....

Last edited by GTO : 4th August 2014 at 12:02. Reason: No mention of illegally high speeds please
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Old 3rd August 2014, 11:16   #2
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Default re: Chevrolet Sail Diesel - Performance issues

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Originally Posted by pg83 View Post
Hello Guru's,

There has been this silly problem with my Chevrolet Sail Diesel, Firstly the engine was underpowered, no matter what I did the car didn't rev above 3000 RPM ( Both in idle as well as running) and didn't go north of 100KMPH and if I insisted there was this white smoke, which really scared me. But while investigating at Chevrolet ASS, the culprit was found to be a rubber hose which helps in creating vacuum for the turbo. It was replaced under warranty and thus the pick up was restored and the engine was roaring again. I am satisfied with the performance though, but while testing the vehicle on highway, I tried to rev the engine and see if the car goes north of 100KMPH, but to my dismay the car didn't cross 120KMPH and around 120KMPH the car starts shivering ( the engine I mean) and the power throw was in cycle ( for few seconds it shot and then started shivering and this cycle repeated).
I am still wondering what is wrong with the car as the same car use to touch 140-150KMPH easily.
Please Help....
Cleaned the air filter ? What about tyre pressures ? If all of this is a check, try disconnecting the battery terminals and re connecting them back after like 10 minutes and see what happens !
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Old 3rd August 2014, 11:54   #3
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Default re: Chevrolet Sail Diesel - Performance issues

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Originally Posted by humyum View Post
Cleaned the air filter ? What about tyre pressures ? If all of this is a check, try disconnecting the battery terminals and re connecting them back after like 10 minutes and see what happens !
Got new fuel filter and air filter when we troubleshot for the faulty rubber hose.
By disconnecting the battery terminal, do you want me to reset the ECM?
Also I tried to troubleshoot any ECM codes by portable bluetooth obd2 device elm 327, but it did t show any error codes on ECM.
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Old 3rd August 2014, 12:11   #4
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Default re: Chevrolet Sail Diesel - Performance issues

Check the turbo hose pipes too. Hook up the ecu scanner and go for a spin with the service centre guys. See if the desired boost is in the specifications. Max boost should go upto 2400/2500. Ask them to reset the ecu too.
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Old 4th August 2014, 12:05   #5
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Default Re: Chevrolet Sail Diesel - Performance issues

I think your Sail might be affected by this recall : Link with more details (Chevrolet issues recall for 1.3L SMARTEC diesel Sail U-VA & sedan).

Please have it checked.
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Old 4th August 2014, 13:27   #6
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Default Re: Chevrolet Sail Diesel - Performance issues

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Originally Posted by GTO View Post
I think your Sail might be affected by this recall : Link with more details (Chevrolet issues recall for 1.3L SMARTEC diesel Sail U-VA & sedan).

Please have it checked.
Just curious, how does a cranckshaft hub bolt affect performance as described?

Jeroen
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Old 10th August 2014, 21:40   #7
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Default Re: Chevrolet Sail Diesel - Performance issues

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Originally Posted by GTO View Post
I think your Sail might be affected by this recall : Link with more details (Chevrolet issues recall for 1.3L SMARTEC diesel Sail U-VA & sedan).

Please have it checked.
I have already got this part replaced( here is the image of the part that was replaced) and after that I have driven my car more than 15000 KMS but have not faced any problem, although I do not encourage driving at such speed but it is really bothering me as why my car is not going north of 120KMPH and what is that vibration?
Chevrolet Sail Diesel - Performance issues-hub-bolt.jpg

Chevrolet Sail Diesel - Performance issues-hub-bolt-1.jpg
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Old 11th August 2014, 09:23   #8
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Default Re: Chevrolet Sail Diesel - Performance issues

For all you know , the vibrations might be a result of out-of-balance tyres too.

When did you get your wheels aligned and balanced last
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Old 11th August 2014, 09:42   #9
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Default Re: Chevrolet Sail Diesel - Performance issues

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For all you know , the vibrations might be a result of out-of-balance tyres too.

When did you get your wheels aligned and balanced last
The vibration isnt from Wheels, although i got them aligned and balanced last week only. Had it been from Wheels it wouldn't be cyclic.
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Old 12th August 2014, 03:36   #10
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Default Re: Chevrolet Sail Diesel - Performance issues

Hi,

Is this issue consistent or is it intermittent?

If your car is not revving beyond a certain limit like 2000-3000rpm when running or standstill and feels like a speed governor is fixed, try getting your MAF sensor cleaned which can sort out the power issue, if this is the issue you will not get any errors logged in your ecm. I am not sure if the vibration is because of the same issue but it might just be your feeling since the engine does not rev freely and might feel as it is running rough.

Last edited by rocky080 : 12th August 2014 at 03:37.
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Old 13th August 2014, 07:18   #11
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Default Re: Chevrolet Sail Diesel - Performance issues

Hi Pg83
Very sorry to hear about the problem in your car.
Can you check the car in the following steps.
1. Park the car and put in neutral.
2. Now raise engine RPM in steps of 500. Starting from say 1000, 1500 etc till the max. Preferably have the service center personnel standing by.
3. Hold each RPM for about 3 to 4 minutes to let the turbocharger attain full RPM and charge air pressure to stabilize at that engine RPM.
4. Since you mentioned you have obd2 reading device you can read out the charge air pressure at each step.
5. If it is an engine side problem it should show up here. If not then it may be transmission/drive shaft/wheel balancing issue.

Also you mentioned you got the crankshaft hub bolts replaced and run trouble free for 15000km. Can you recheck them for tightness. Along with the same check all the components that were removed to carry out this job.

My guess is the turbocharger may be out of balance or crank shaft balancing issue.
It may also be improper fuel injection in any one cylinder at high RPM causing this vibrations.
Please keep us posted.
Take care
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Old 13th August 2014, 08:28   #12
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Default Re: Chevrolet Sail Diesel - Performance issues

Quote:
Originally Posted by pg83 View Post
I tried to rev the engine and see if the car goes north of 100KMPH, but to my dismay the car didn't cross 120KMPH and around 120KMPH the car starts shivering ( the engine I mean) and the power throw was in cycle ( for few seconds it shot and then started shivering and this cycle repeated).
Fuel quality and the injector condition - may need cleaning.

What about EGR system?!

Anurag.
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Old 2nd October 2014, 11:11   #13
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Default Re: Chevrolet Sail Diesel - Performance issues

Went to Padam motors, Chandigarh for 30K Service, got the following things done:
1. Engine Oil and filter replacement.
2. Air Filter replacement.
3. Fuel Filter replacement.
4. Engine Flush.
5. Engine decard.

Before these things were done, the Mechanic was unable to diagnose the problem, but after the service, this problem got resolved and the car is not running smooth. No issues at all.
Only matter of concern is replacement of 3rd Air filter in mere 30K run and that too when i cruise mostly on highways.
Never the less the car is performing like it should.
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