2014 F-Type V6 S - Misfire sound in high RPM.
#1
2014 F-Type V6 S - Misfire sound in high RPM.
2014 V6 S
When driving my 14’FType starting off is perfectly fine, no problems within low range RPM. However the ‘Spurting/Machine gun’ happens when more power is put down during higher RPM - this happens not when you thrash it - but higher RPM in general regardless which gear we are in.
Any Ideas?
• See video below for the sound - I know we get pops/bangs and burbles with our FType, but this shouldn’t be happening when pressing down for more power
When driving my 14’FType starting off is perfectly fine, no problems within low range RPM. However the ‘Spurting/Machine gun’ happens when more power is put down during higher RPM - this happens not when you thrash it - but higher RPM in general regardless which gear we are in.
Any Ideas?
• See video below for the sound - I know we get pops/bangs and burbles with our FType, but this shouldn’t be happening when pressing down for more power
Last edited by MarcAztex; 01-17-2024 at 01:31 AM.
#2
#3
• With driving: if building up the speed slowly over time it we have no problems, and doesn’t struggle, but as soon as you put your foot down in either, normal, dynamic or wet weather it will make the sounds & struggles for power to build up to the speed wanted. It’s really bizarre!
I had cruise control on at 62mph and upon hitting a hill of course engine normally drops a gear or puts more RPM to ensure 62 is maintained - but as the car needed more power to tackle the hill at 62 it started to make the misfire sounds again and struggled to have that instant power! (Resulting in me having to press the accelerator slowly to build up the speed)
super annoying as it’s a problem I’ve never had before
#5
(will try to get a video later today if it helps)
#7
REPLY: I did do a diagnostics fault code check and came back clear surprisingly (even checks codes if no warning lights are on too) so nothing is being flagged on the system
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#9
2014 V6 S
When driving my 14’FType starting off is perfectly fine, no problems within low range RPM. However the ‘Spurting/Machine gun’ happens when more power is put down during higher RPM - this happens not when you thrash it - but higher RPM in general regardless which gear we are in.
Any Ideas?
When driving my 14’FType starting off is perfectly fine, no problems within low range RPM. However the ‘Spurting/Machine gun’ happens when more power is put down during higher RPM - this happens not when you thrash it - but higher RPM in general regardless which gear we are in.
Any Ideas?
My completely uneducated and wild guess is a bad injector.
#11
I have recently changed the injectors though 👍🏽
#12
#15
☝🏽 This only happens when I increase acceleration&rpm need to either overtake/climb a hill ☝🏽
#16
#18
See if you can replicate it in manual mode without upshifting. Exhaust pops will only be with a drop in revs , maybe on up shifts if driving in auto or if you take your foot off gas quickly in manual mode. Up shift farts are under your control with the paddles so easy to identify.
your video has two noises. First sounds like the normal upshifts at high revs. Second noise later in the video is different again ? Is that your concern
just re read your post. As you have power loss it’s going to be an engine/fueling issue rather than exhaust.
your video has two noises. First sounds like the normal upshifts at high revs. Second noise later in the video is different again ? Is that your concern
just re read your post. As you have power loss it’s going to be an engine/fueling issue rather than exhaust.
Last edited by Borbor; 01-17-2024 at 02:51 AM.
#19
Sounds kind of like what most people call the "pops and crackles" which are created by unburnt fuel reaching the hot exhaust.. if unburnt fuel is reaching the exhaust on acceleration then maybe you've got no spark in a cylinder. The sound being evenly spaced is what I'd expect if one cylinder's fuel was igniting in the exhaust. Dead plug maybe? Ignition issue? Maybe one cylinder is overfueling under load and fouling the plug?
Does it make the noise when the engine is really cold, like if you start the car, immediately get out onto the street, and floor it? If the answer is no but it starts doing it as the car warms up, that might support the idea.
If you had a major exhaust leak in one header you might also get a cracking sound like this, but the leak would have to be pretty major and I'm not sure if it'd come with a significant power loss. I also think it'd happen all the time, not just under acceleration.
These sorts of things are really hard to diagnose over the internet, might be worth having a shop look at it. Happy to keep taking dumb guesses at it tho 😂
Does it make the noise when the engine is really cold, like if you start the car, immediately get out onto the street, and floor it? If the answer is no but it starts doing it as the car warms up, that might support the idea.
If you had a major exhaust leak in one header you might also get a cracking sound like this, but the leak would have to be pretty major and I'm not sure if it'd come with a significant power loss. I also think it'd happen all the time, not just under acceleration.
These sorts of things are really hard to diagnose over the internet, might be worth having a shop look at it. Happy to keep taking dumb guesses at it tho 😂
#20
See if you can replicate it in manual mode without upshifting. Exhaust pops will only be with a drop in revs , maybe on up shifts if driving in auto or if you take your foot off gas quickly in manual mode. Up shift farts are under your control with the paddles so easy to identify.
your video has two noises. First sounds like the normal upshifts at high revs. Second noise later in the video is different again ? Is that your concern
just re read your post. As you have power loss it’s going to be an engine/fueling issue rather than exhaust.
your video has two noises. First sounds like the normal upshifts at high revs. Second noise later in the video is different again ? Is that your concern
just re read your post. As you have power loss it’s going to be an engine/fueling issue rather than exhaust.
Maybe just maybe one of the cat bricks has started to break up as that might explain both symptoms?