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Rough idle fuel smell misfire

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Old 05-16-2020, 08:45 PM
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Default Rough idle fuel smell misfire

2015 f type non s 47k miles
was driving today and the car started to idle rough and a fuel smell started to come there was misfire
home was a mile away so drove home
started the car after an hour
no misfire
rough though
major gas smell
white smoke from one exhaust smelling of gas
engine light on

bought car from Porsche with 4 year engine transmission electrical all non wear and tear warranty

drop where I bought from
drop at jaguar
drop at any good jag shop in Orange County ca

please advise and what do you think is going on
 
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Old 05-16-2020, 08:48 PM
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Old 05-16-2020, 08:49 PM
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I think I also see some black inside the exhaust pipes
 
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Old 05-16-2020, 09:09 PM
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Stuck injector?
 
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Old 05-16-2020, 10:29 PM
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Don’t know halve to get it checked,Monday
 
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Old 05-17-2020, 05:18 AM
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Originally Posted by Karim Ali
I think I also see some black inside the exhaust pipes
It’s a very bad sign if you don’t see black soot in the exhaust pipes. Anyway, I’m also betting on a fuel injector that’s stuck open. Try throwing a can of BG 44K into the fuel tank. That might loosen things up. Did you get a CEL?
 

Last edited by Unhingd; 05-17-2020 at 07:34 PM.
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Old 05-17-2020, 05:24 AM
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Originally Posted by Unhingd
It’s a very bad sign if you don’t see black suit in the exhaust pipes. Anyway, I’m also betting on a fuel injector that’s stuck open. Try throwing a can of BG 44K into the fuel tank. That might loosen things up. Did you get a CEL?
Yep, very likely a stuck open injector or two and a can of BG 44K just might do the trick.
Speaking of black suits, I just watched Men In Black 1 and 2 again, lots of bugs!
 
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Old 05-17-2020, 05:49 AM
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Originally Posted by Unhingd
Did you get a CEL?
I guess you missed the bit in the OP that said "engine light on" ...
 
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Old 05-17-2020, 02:41 PM
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Cel codes as folllows

po 300 random misfire
po 303 cylinder 3 misfore
po 301 cylinder misfore
po 302 cylinder 2 misfire
 
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Old 05-17-2020, 02:41 PM
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Cel codes as folllows

po 300 random misfire
po 303 cylinder 3 misfore
po 301 cylinder misfore
po 302 cylinder 2 misfire
 
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Old 05-17-2020, 07:35 PM
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Originally Posted by OzXFR
Yep, very likely a stuck open injector or two and a can of BG 44K just might do the trick.
Speaking of black suits, I just watched Men In Black 1 and 2 again, lots of bugs!
****ing spellcheck!
 
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Old 05-18-2020, 05:45 PM
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Started the car today after the big 44 treatment
drove under 3000 rpm
no misfire
no idling issues
need to reset check engine light but everything seems fine

first thanks for all your assistance
2nd should I still take it in or I am good for now
 
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Old 05-18-2020, 05:59 PM
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Originally Posted by Karim Ali
Started the car today after the big 44 treatment
drove under 3000 rpm
no misfire
no idling issues
need to reset check engine light but everything seems fine

first thanks for all your assistance
2nd should I still take it in or I am good for now
Clear the codes and take it for a longer run with some "spirited" acceleration from time to time, then check for codes again.
If it runs well with no misfires or gas smell and the codes didn't come back then you are good to go and no need to take it in to the dealer, although it might be a good idea to continue treating it with "big 44" ( I like it!) every six months or so.
 
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Old 05-18-2020, 06:22 PM
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Thank you
 
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Old 05-18-2020, 07:25 PM
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Very likely, as others have said, a fuel injector problem. It has happened to my XKR 5.0L twice with exactly the same symptoms. Other XKR owners have had the same experience. In every case including mine, it was injector related.
 
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Old 05-18-2020, 09:38 PM
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Originally Posted by OzXFR
Clear the codes and take it for a longer run with some "spirited" acceleration from time to time, then check for codes again.
If it runs well with no misfires or gas smell and the codes didn't come back then you are good to go and no need to take it in to the dealer, although it might be a good idea to continue treating it with "big 44" ( I like it!) every six months or so.
+1.
 
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Old 05-20-2020, 12:38 AM
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All fixed
dealer stated nothing wrong
cant pin point the issue but stated could be injectors throttle body or jus bad fuel and bg 44 cleared it
stated to use bg 44 on the next tank again and once every six months
 
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Old 05-22-2020, 10:36 AM
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This is a stuck open injector, raw fuel will start pouring out the pipes if you let it run long enough, while it is doing the misfire and smoke. have done a few of these, its not uncommon. you will likely need 6 injectors and 2 HPFP (usually the reason the injectors fail) in the future. it will happen again at some point i would think.BG44 will help. crossing my fingers you get some miles before it sticks again.
 
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Old 06-29-2022, 12:41 PM
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Same issue I am having with my 15 R. Towed the car the dealer waiting for the to inspect the car
 
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Old 06-29-2022, 02:07 PM
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Is the "every six months" recommendation really a calendar driven thing, or should it be mileage based? I'm driving my S maybe 7,000 miles a year, 2 or 3 times a week. 95% of that is long drives, hour or more, either freeway or spirited back roads. I buy only top tier 91 oct, almost always Chevron. Should I still do this every 6 months, or is there a mileage interval that is more appropriate? Thanks.
 


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