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Unread 09-18-2017, 10:03 PM #1
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Car exhaust poping through hard acceleration

So just recently I finally for an accessport. I'm running the stage 2 tune at 92 octane with a AEM Cold Air intake, OBX Catless downpipe, and forge BOV. After A few days of driving it and a oil change to Castrol 0-w40. When I accelerate hard from 2nd 3rd and 4th after about 4500 rpm you hear popping from the exhaust while accelerating and a very slight loss of power or boost feeling. Any idea what it could be. It doesn't feel like a coil or misfire especially since I had a coil go bad recently and changed them all out to oem.

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Unread 09-19-2017, 09:23 AM #2
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Car exhaust poping through hard acceleration
Get rid of the accessport. Its going to kill your car. This is not a joke. There is a reason they dropped MINI support. They couldn't figure it out.
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Unread 09-19-2017, 09:45 AM #3
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Car exhaust poping through hard acceleration
Quote:
Originally Posted by Grizld700 View Post
Get rid of the accessport. Its going to kill your car. This is not a joke. There is a reason they dropped MINI support. They couldn't figure it out.
That's nonsense. They stopped making it for MINI because they couldn't crack the Engine Control Unit on the N18 engine so they could reprogram it through the OBDll port, like on the N14 engine Accessport.

That limited their possible market share, making it unprofitable to make and support.

I've had one for seven years with no problems. If anything the AP canned tunes are a little tame so as to err on the safe side.
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Unread 09-19-2017, 10:12 AM #4
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Car exhaust poping through hard acceleration
Manic tune, accessport, crap OBX downpipe, all of these things could be your problem.
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Unread 09-19-2017, 11:17 AM #5
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Originally Posted by Dave.0 View Post
Manic tune, accessport, crap OBX downpipe, all of these things could be your problem.
No manic tune, the downpipe has been fine for the last 8 months before the accessport. There are no leaks or stress crack on the down pipe or gasket. But after digging through my engine bay all morning my HPFP could be on it's way out because it looks like it might be leaking.

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Unread 09-19-2017, 11:52 AM #6
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Car exhaust poping through hard acceleration
What codes pop up? If your HPFP is failing it'll throw a code. The main issue is that you've got a ticking time bomb for an engine and you're messing with it. #betteroffstock
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Unread 09-19-2017, 12:14 PM #7
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What codes pop up? If your HPFP is failing it'll throw a code. The main issue is that you've got a ticking time bomb for an engine and you're messing with it. #betteroffstock
No codes yet. I don't hear any metal pings like it's knocking or sparking early. The timing is fine through out the band. So it seems like it's something with either fuel, coils or plugs. I already removed the tune and unmarried the accessport. On a stock map or no accessport married it's 100% fine

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Unread 09-19-2017, 12:25 PM #8
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Car exhaust poping through hard acceleration
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On a stock map or no accessport married it's 100% fine
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Problem solved

Maybe not enough fuel for the amount of air you're pushing.
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Unread 09-19-2017, 12:30 PM #9
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Problem solved

Maybe not enough fuel for the amount of air you're pushing.
It's a possibility. I forgot to mention that on a stage 1 map a lot better than stage 2. It pops once then stays fine and only happens in second and third. Maybe a bad injector?

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Unread 09-19-2017, 01:32 PM #10
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Originally Posted by haliphics View Post
It's a possibility. I forgot to mention that on a stage 1 map a lot better than stage 2. It pops once then stays fine and only happens in second and third. Maybe a bad injector?

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Si, or not enough injector?
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