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Old 07-17-2016, 10:55 AM
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Engine shutter (miss?) at stop light

Gentlemen,

Still fairly new to the diesel world so still learning.

Re: 2014 (all recalls supposedly done - with the exception of the latest shifter one) 23k km (14.3k miles).

When the engine is warm and I stop at the lights, (intermittently) we will feel a slight shutter in the engine (the tach pointer will also drop a bit). Doesn't seem to do it while in park, just at a stop, in drive.

Would you say this is "normal"?

The reason I ask is that it is intermittent and *if* I take it to the dealer and they can't reproduce the problem , I know they will want to charge me for the time. It does it fairly often, but with Murphy's Law, the one time I take it in, it will not do it.

Suggestions?

Thanks

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Old 07-17-2016, 11:03 AM
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Re: Engine shutter (miss?) at stop light

How long has it been doing it? If not long you could have gotten a bad tank of fuel, possibly with water in it. Have you filled up at a different location lately?
Maybe try an additive that gets the moisture out.
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Old 07-17-2016, 11:20 AM
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Quote:
Originally Posted by LongJohns View Post
Gentlemen,

Still fairly new to the diesel world so still learning.

Re: 2014 (all recalls supposedly done - with the exception of the latest shifter one) 23k km (14.3k miles).

When the engine is warm and I stop at the lights, (intermittently) we will feel a slight shutter in the engine (the tach pointer will also drop a bit). Doesn't seem to do it while in park, just at a stop, in drive.

Would you say this is "normal"?

The reason I ask is that it is intermittent and *if* I take it to the dealer and they can't reproduce the problem , I know they will want to charge me for the time. It does it fairly often, but with Murphy's Law, the one time I take it in, it will not do it.

Suggestions?

Thanks
Check if it happens at highway speeds too. If it does it might be the cylinder heads getting clogged up. Do you do a lot of city driving?
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Old 07-17-2016, 11:20 AM
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Re: Engine shutter (miss?) at stop light

Quote:
Originally Posted by Governor View Post
How long has it been doing it? If not long you could have gotten a bad tank of fuel, possibly with water in it. Have you filled up at a different location lately?
Maybe try an additive that gets the moisture out.
Thanks for your reply.

It has been doing it for the last several weeks. We usually fill at 1 or 2 stations but I will not rule out water in the system.

Is there a product you can recommend for the additive?

Shouldn't the water filter remove any moisture? I am not getting any water in fuel indication on the display.

Quote:
Originally Posted by Floridaman View Post
Check if it happens at highway speeds too. If it does it might be the cylinder heads getting clogged up. Do you do a lot of city driving?
We don't notice it at highways speeds. Most of the driving is in the city (short trips), but did do a ~600 mile trip on the May long weekend and a couple of 60 mile highway trips since then.
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Old 07-17-2016, 11:52 AM
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Re: Engine shutter (miss?) at stop light

Vacuum leak? Spray vacuum hoses with carb cleaner or WD40 with engine running. If engine speeds up you have a vacuum leak. The only diesels I've ever owned were John Deere, Caterpillar, and now a Kubota.

https://www.bellperformance.com/dee-zol-products
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Old 07-17-2016, 07:03 PM
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Re: Engine shutter (miss?) at stop light

Quote:
Originally Posted by Governor View Post
Vacuum leak? Spray vacuum hoses with carb cleaner or WD40 with engine running. If engine speeds up you have a vacuum leak. The only diesels I've ever owned were John Deere, Caterpillar, and now a Kubota.

https://www.bellperformance.com/dee-zol-products
Vacuum leak on a diesel???
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Old 07-18-2016, 03:05 PM
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Re: Engine shutter (miss?) at stop light

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Originally Posted by 2012 Summit View Post
Vacuum leak on a diesel???

Mine does that too it just started about a month ago. Its also throwing a code (CEL is on) PO4DB (Crankcase ventilation disconnected) I took it in once and they replaced the PVC valve sensor it worked for a little and now its doing it again. I have an appointment to take it in tomorrow. Mine is a 2014 with 40K on it. It seems the shutter at the stop light has stopped for now.

I will tell you what has me baffled is the change in the oil we are to use now effective 15 July 2016. The new 8th Ed owners manual says 5W-40 Syn that meets CJ4 specs. They recommend Rotella from Shell. I'm wondering if I use this oil will it fix my problem??? Ill let you know what I find out from the dealer.
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Old 07-20-2016, 04:12 PM
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Re: Engine shutter (miss?) at stop light

So I guess then this is not "normal" then.

So far no codes on it, guess I will have to mention it when I take it in the next time. Hopefully it will do it for them. It doesn't seem to do it while "cold" and only when the engine is warm.

The only time it does it is at the lights.
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Old 07-23-2016, 04:29 PM
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Re: Engine shutter (miss?) at stop light

Are you guys sure it's an engine miss? After the crappy re-flash that altered the transmission shift settings, mine downshifts awkwardly when I stop at a light.
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Old 07-24-2016, 07:52 PM
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Re: Engine shutter (miss?) at stop light

Quote:
Originally Posted by Terex View Post
Are you guys sure it's an engine miss? After the crappy re-flash that altered the transmission shift settings, mine downshifts awkwardly when I stop at a light.
Mine happens while at a full stop already, in drive, foot on the brake. You can fell it and can see the tach drop a bit and go back to normal (will do it several times while waiting at the light).

Does not do it when in park (or not that I have yet to notice).
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Old 07-24-2016, 10:41 PM
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Re: Engine shutter (miss?) at stop light

Quote:
Originally Posted by LongJohns View Post
Mine happens while at a full stop already, in drive, foot on the brake. You can fell it and can see the tach drop a bit and go back to normal (will do it several times while waiting at the light).

Does not do it when in park (or not that I have yet to notice).
Hmm…the "several times" obviously rules out shifting. Will continue to follow. What happens for one could happen for all.
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Old 08-07-2016, 01:13 PM
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Re: Engine shutter (miss?) at stop light

I just experienced the "shudder" as described in first part of this thread. Friday, while in motion @ 56mph, the engine seemed to skip a beat for 0.5 seconds. Felt as though it fully stopped and then continued.
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