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car has no power in the high rev range, 

 

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bry40l
 Post subject: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 12:57 pm 
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now ive just driven my car down to the bank to find it running realy smooth, but then i noticed if i let it rev out, theres no power, when i got home i checked the map sensor/ vaccum lines, and they all seem fine, when i rev it with the door open i can hear a weird sound coming from the muffler, like a hissing/ lots of hair flowing out the exhaust which it never has done before
what the hell hav i broken?
:x
edit: i filled up from a brand new petrol station this morning with 95 octane. could it be from their petrol? i have never filled up there before

 

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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 1:41 pm 
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better not be s**t petrol, the one time i dont take the recipt :roll:

 

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c james
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 1:51 pm 
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Collapsed cat? Just a guess I've herd it can cause power loss... Throwing it out there

 

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tearlejc
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 1:58 pm 
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c james wrote:
Collapsed cat? Just a guess I've herd it can cause power loss... Throwing it out there


yeh, either collapsed cat, damage/crushing of an exhaust pipe or muffler, or some idiot has put something in your tailpipe...

 

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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 2:11 pm 
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the cat is a redback high flow, any one had one of these colapse?
it runs as usual if not better than it used to in the lower rev range, as soon as it crosses half way on the tacho its just s**t from there, cant even get it to the red line

 

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xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 2:19 pm 
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im thinking along the lines of fuel starvation like a fuel regulator problem?
map sensor or something

 

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the sam
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 2:43 pm 
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BBM not switching?

 

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phongus
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 2:58 pm 
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the sam wrote:
BBM not switching?


Was thinking that. BBM should switch at 3600RPM if I'm not mistaken. Tell someone to rev it to 3600 and see if the BBM switches from short to long runners.

 

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the sam
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 3:00 pm 
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Sorry Bry, but is the cat metal or ceramic core?
Metallic core cats dont normally f**k out...

 

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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Mon Jan 23, 2012 4:02 pm 
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seems that the cat has colapsed to me, definatly not the bbm, it seems to be able to ease up to 3200 rpm and thats it, but if i plant the foot even at 1500rpm it has no power and makes this terrible air rushing noise, if i back off it sounds rough, instantly stops that terrible exhaust sound and idles down really quickly to 1200rpm then goes back to normal, will punch it out tommorro until i can weld a new one in there

 

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xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Tue Jan 24, 2012 11:25 am 
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it smells a little funny, sounds rattley, and no steam or water/ fuel dripping out the exhaust

 

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xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Tue Jan 24, 2012 12:14 pm 
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well i did a 16 hour shift last night with this ear infection and now all the doctors ive called in my area that i would normaly see are on holiday or on their way to hospital lol
so ive jammed some panadene fort up me guts and have the exhaust unbolted but the cats still to hot, will give it an abortion :D and see how i go lol.

 

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xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Tue Jan 24, 2012 12:46 pm 
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started the car with no cat and instantly reved past 3000 and sounded like a normal healthy e series would with no exhaust :) stuck a torch down the end of the cat that bolts to the exhaust and seemed as though the holes were closed over where the exhaust gases travel through,
will be interesting to see if ive actually gained more power with these extractors because maybe the cats been fudged the whole time :roll:

 

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BF XR6
xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Tue Jan 24, 2012 1:27 pm 
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maybe the car needs to adjust to not being blocked up but it runs much smoother, exhaust still sounds a little s**t, and it doesnt have as much power as it did before the cat f**k up, still driving much better than what it was lol, couldnt really get it over 80 km/h
thanks for everyones help.

 

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BF XR6
xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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bry40l
 Post subject: Re: car has no power in the high rev range,
Posted: Tue Jan 24, 2012 9:09 pm 
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i dono how to tell what its made of! i have a feeling the gasgets arent sealing properly, probably should replace them, have been undone now 3 times :shock:
i remember my mates falcon had a gutted cat extractors and a 1 muffler set up and it made the same s**t sound so i think i just need to put a new cat on it

also the inside of the cat (on the exit side) seemed to be in one piece when i stuck the torch in there, it just looked like the little holes were all closed over/blocked

 

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BF XR6
xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto
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