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Author Topic: misfires after going downhill experts please help!!  (Read 2476 times)

Offline Adrenaline

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misfires after going downhill experts please help!!
« on: September 10, 2014, 01:16:55 pm »
Hey guys since may i have this problem in my car whenever i go in a downhill and then reach straight road and try to push the throttle the car misfires and become undriveable it throws a cylinder 3 misfires anyone has any info i drive the car for months without the problem it just happens when coming back from my village exactly after the downhill

PS:i have a downpipe leak which i will fix tomorrow and i have a Camshaft positioner  bank 1 intake  slow response fault after clearing it it comes back in some miles ...
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Offline marko

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Re: misfires after going downhill experts please help!!
« Reply #1 on: September 10, 2014, 02:27:25 pm »
Low on fuel at the time??
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #2 on: September 10, 2014, 03:37:35 pm »
No never it happened twice and was never low on fuel
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Offline Scottymon

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Re: misfires after going downhill experts please help!!
« Reply #3 on: September 10, 2014, 04:54:51 pm »
I wonder if the LPFP is having a hard time.
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #4 on: September 10, 2014, 05:47:33 pm »
A bad lpfp will throw a cylinder misfire?
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Offline W6llace

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Re: misfires after going downhill experts please help!!
« Reply #5 on: September 10, 2014, 07:41:23 pm »
If it was a fuel pressure fault it would show multiple cylinder mis-fire not just on cylinder 3 I would swop ignition coils over to cylinder 4 and test again if 4 comes I would change the coil for a new one !
Also check the connectors aswell .
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #6 on: September 10, 2014, 09:28:26 pm »
It has thrown random multiple misfires +cylinder 3 misfires and no i tried changing coils its not about them something is really mysterious im having a headache
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Offline W6llace

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Re: misfires after going downhill experts please help!!
« Reply #7 on: September 10, 2014, 10:12:51 pm »
Try replacing the fuel filter ?
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Offline Pikey Motorsports

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Re: misfires after going downhill experts please help!!
« Reply #8 on: September 10, 2014, 10:40:36 pm »
you tryed plugs? i doubt it will have anything to do with going down a hill
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #9 on: September 10, 2014, 11:45:04 pm »
I changed plugs to NGK bkr7eix and i have just changed the fuel filter today it has to do with releasing the throttle for a long time then trying to push it again and my car does popping sound and farting when throttle is released in downhill roads
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Offline xjay1337

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Re: misfires after going downhill experts please help!!
« Reply #10 on: September 11, 2014, 12:29:14 am »
Vacuum issue???
Does it only happen on downhills or is it when coasting for a long time...
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #11 on: September 11, 2014, 07:35:23 am »
No it happens only in downhill i can drive the car in the city for months without problem
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Offline flashp

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Re: misfires after going downhill experts please help!!
« Reply #12 on: September 11, 2014, 07:58:24 am »
My guess would be it's fuel related since the issue responds to a change in gradient. You could also consider a faulty fuel safety cut off switch or even a tilt switch associated with the alarm system.
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Offline Adrenaline

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Re: misfires after going downhill experts please help!!
« Reply #13 on: September 11, 2014, 12:43:13 pm »
Its a really strong misfire that you cant drive the car anymore you have to carry it on a truck and it makes unburnt fuel smell
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Offline W6llace

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Re: misfires after going downhill experts please help!!
« Reply #14 on: September 11, 2014, 04:26:49 pm »
Take the sender unit out and inspect the tank you make have dirt or something blocking the pick up with is causing the problem ?
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