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Code p0300 cel missfire

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Old Apr 2, 2019 | 10:36 AM
  #1  
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Default Code p0300 cel missfire

Hey vetters

Hope u all good

I have a GS 10 c6 stock and the engine light comes on and off , recently it says longer than before so when checked it gave me the code p0300 cel missfire

Note that since 3 years I barely run the car up to 8000 km a year and only change pil and filter

What do u think the issue and what would u recommend ?


Thank you in advance and God bless u all
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Old Apr 2, 2019 | 10:27 PM
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change the spark plugs
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Old Apr 3, 2019 | 03:24 PM
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I did spark plug change yet not solved
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Old Apr 3, 2019 | 04:45 PM
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IF plugs were changed, make extra certain boots are seated properly.
MANY owners screw this up, easy to improperly install boots which eventually triggers a CEL
Check coil pack wiring's secure while you're at it, also.

Helps if members know where you are, too.
If overseas options/advice is limited, beside an official Chevrolet dealer.
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Old Apr 4, 2019 | 01:58 AM
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Originally Posted by Landru
IF plugs were changed, make extra certain boots are seated properly.
MANY owners screw this up, easy to improperly install boots which eventually triggers a CEL
Check coil pack wiring's secure while you're at it, also.

Helps if members know where you are, too.
If overseas options/advice is limited, beside an official Chevrolet dealer.
Hey, it's with official dealer yet not solved and they expect the issue from the ( properal shaft ) not sure how to spell it though , anyhow indent think this is the issue I believe it's mostly the spark plugs or needs injectors cleaning and sensor
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Old Apr 4, 2019 | 10:04 AM
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Originally Posted by Osama Khalid
Hey, it's with official dealer yet not solved and they expect the issue from the ( properal shaft ) not sure how to spell it though , anyhow indent think this is the issue I believe it's mostly the spark plugs or needs injectors cleaning and sensor
OK we've a language barrier, here.
Get proper spelling of what the suspected issue is and post it.
While there's a torque tube there's no 'properal shaft' I've ever heard of.

IF car's already at a Chevrolet dealer, you're at their mercy to rectify this matter.
You're paying for service so let 'em do their job. Nothing much else can be done.

Do post back stating what was/wasn't found, please.
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Old Apr 4, 2019 | 10:12 AM
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Originally Posted by Landru
OK we've a language barrier, here.
Get proper spelling of what the suspected issue is and post it.
While there's a torque tube there's no 'properal shaft' I've ever heard of.

IF car's already at a Chevrolet dealer, you're at their mercy to rectify this matter.
You're paying for service so let 'em do their job. Nothing much else can be done.

Do post back stating what was/wasn't found, please.

They meant the propeller shaft ( drive shaft ) there r rubbers they believe those r causing the code to appear and have the car shake a bit

Dealer gave high estimation that is more than the vat value itself so apart from the cost I'd trust dealer but I'm still not convinced in the guessing part that in fact they should give me clear statement where the issue

Sorry I am trying my best to write and narraow the lang barrier here. easy on me
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Old Apr 4, 2019 | 11:37 AM
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Originally Posted by Osama Khalid
They meant the propeller shaft ( drive shaft ) there r rubbers they believe those r causing the code to appear and have the car shake a bit...Dealer gave high estimation that is more than the vat value itself so apart from the cost I'd trust dealer but I'm still not convinced in the guessing part that in fact they should give me clear statement where the issue
First off dealer pricing, be it stateside or overseas, is always high my friend. Always.
Personally I don't get the connection between a bad 'propeller shaft' & P0300.
IIRC C6 torque tubes use/has rubber couplings and have read they do/can go bad.
Here again one's at the mercy of a dealer when/if car's been turned over to them for repair.
Bad position and definitely stinks but you're stuck paying & weeping afterwards hoping they're correct.
That much is the same whether SS or Europe/Middle East etc.

Sorry I am trying my best to write and narraow the lang barrier here. easy on me

Being as easy as I can, there's no need to apologize.
FWIW CF has members from around the globe wherever Corvettes are. Language barriers aren't uncommon.
As such most owners try helping, not hurting.
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Old Apr 4, 2019 | 11:47 AM
  #9  
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Originally Posted by Landru
First off dealer pricing, be it stateside or overseas, is always high my friend. Always.
Personally I don't get the connection between a bad 'propeller shaft' & P0300.
IIRC C6 torque tubes use/has rubber couplings and have read they do/can go bad.
Here again one's at the mercy of a dealer when/if car's been turned over to them for repair.
Bad position and definitely stinks but you're stuck paying & weeping afterwards hoping they're correct.
That much is the same whether SS or Europe/Middle East etc.




Being as easy as I can, there's no need to apologize.
FWIW CF has members from around the globe wherever Corvettes are. Language barriers aren't uncommon.
As such most owners try helping, not hurting.

I salute u, totally understand you I'm just being who I am as well and I'm really proud to tall to u all and share ideas and learn from u guys, I had a lifetime trip to the vette mesuem and track and o cherish each second l. I always said this that the vette community is the family u wont find elsewhere ls God bless u

Back to technical part, well on more of a person who can make things look better in terms of design I'm not into mechanics yet I wasnt able to connect between both when they told me that and i still see the problem mainly would be spark 0lus and doing injectors cleaning or perhaps check the sensor, alsonu r rigjt about dealers.. if I showed u the bill I'm sure the entire forum will go banana. I'm gonna check again about it and c how it goes

Again thanks alot for time and God bless u
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Old Apr 4, 2019 | 04:21 PM
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At this stage all one can do is wait and see.
And I've paid a few skyhigh tabs to Chevrolet, myself. Probably not as much as you're paying, but a lot to me.
Thing is to do a proper diagnostic via Internet is difficult, at best. Language barrier, or not.
Why I'm quite curious whether this dealer's work solves the issue.

Never mentioned where you're living, but something to think about.
Begin a 'search' of competent independent shops, now. A 'safe' alternative to dealer.
Get good references on whoever's found, meaning try to speak w/ other owners who'd done business w/ them.
This assumes Corvette et al aren't too scarce where you live, like F cars are in flyover USA.

Let us hope after the expense at least it's the solution. G/L
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Old Apr 4, 2019 | 04:39 PM
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Originally Posted by Osama Khalid
Sorry I am trying my best to write and narraow the lang barrier here.
Originally Posted by Landru
Being as easy as I can, there's no need to apologize.
FWIW CF has members from around the globe wherever Corvettes are. Language barriers aren't uncommon.
As such most owners try helping, not hurting.
Indeed, many of us native English speakers on Corvette Forum mangle the language too.
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Old Apr 4, 2019 | 04:53 PM
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Originally Posted by John Harry
Indeed, many of us native English speakers on Corvette Forum mangle the language too.
Got that right, John.
Was just on C7 and they're mixing it up good, over proper grammar.
On CF.
Gawd love 'em.
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