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Old 19-04-2007, 06:31 PM   #1
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Default Standard Cam back in Not 100%, I need some answers

The car is pretty much back to factory, , idle normal, no noisy lifter. But i had it in 2nd before and held it at 4000rpm and theres a mad vibrating noise pulsing like, the car has no performance really, i was thinking the fuel filter is blocked up or maybe a injector is fouled. I dont know.
The Crow cam is sitting in the shed! I think it needed a chip or maybe it was my car cos the thing refused to run spot on.

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Old 19-04-2007, 06:51 PM   #2
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the car is hitting the rev limiter at 4000rpm, the cam is still at 3 degrees advanced??? anyone know why its hitting the limiter so early???
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Old 19-04-2007, 07:11 PM   #3
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Someone must know surely???
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Old 19-04-2007, 07:31 PM   #4
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having the cam advanced 3* would bring max power back down to mid to low 4000rpm mark.
dose it feel like its hitting the limiter ,or does it feel like its just running out puff?
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Old 19-04-2007, 07:40 PM   #5
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it wants to make power but gets to just before 4k and hits limiter, it will not rev past 4k foot flat to the flooor
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Old 19-04-2007, 07:46 PM   #6
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its got me stumped,could be a blocked fuel filter.dose it miss and fart and carry on when it hits 4000rpm?
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Old 19-04-2007, 07:50 PM   #7
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yeah theres like a mad pulsing noise going off like a machine gun flat out, it doesnt carry on it wont rev past 4k and its hitting limiter, it does it at idle as well. I mean if your stationery and rev it it wont go past 4k. well i'll be putting the cam into 0 degrees problyy tommorow night.

Last edited by JoesAu; 19-04-2007 at 07:56 PM.
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Old 19-04-2007, 07:59 PM   #8
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tps maybe? seems very strange only to have happened since the cam was put in
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Old 19-04-2007, 08:00 PM   #9
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Hey .. Missed your call before. jo

If you get time change it back to "O" degs .. that will rule out the cam ..
No piont in doing something with out realy knowing .. move the cam back and see what it does then
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Old 19-04-2007, 08:06 PM   #10
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i will do it tommorow night forshore, hopefully the rocker gasket doesnt give me trouble like it has 100 times before the quality of the parts these days is so cheap i reckon lol
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Old 19-04-2007, 09:23 PM   #11
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yeh my au 5ltr does that in 4th :S
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Old 19-04-2007, 09:38 PM   #12
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Absolutly no idea mate but are you selling the cam? :voldar02: If so what grind and how much? Cheers
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Old 19-04-2007, 10:20 PM   #13
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Crow have offered me a full refund. So cant complain with that i guess
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Old 20-04-2007, 09:53 AM   #14
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How long did you have the performance cam in the car? Was it running rich/lean/like crap generally? Did you rev the crap out of it, trying to get it to run nicely?
I've seen BA's and AU's that have experienced prolonged poor mixture conditions (either driving for long periods/hard running with vacuum leaks/exhaust manifold leaks and overpressurised fuel rails) that have made enough unburnt fuel go into the catalytic converter, burn internally and MELT the honeycomb catalyst in the BASTARD.
Even after fixing the original cause of the engine problem (manifold gaskets/loose exhaust manifold and blocked fuel pressure regulator, respectively (4 different cars)), found YOUR problem: flat out at 3000-4000rpm, noise like extreme pinging/rattling and no go.
Pull the engine pipe off the car and shake out the cat. Shine a torch in. If molten bits of honeycomb fall out, its stuffed. The melted catalyst blocks the exhaust flow and won't let the exhaust gas out of the motor - instant rev limiter. You'll need a new one, it will be EPA illegal without it.

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Old 20-04-2007, 04:11 PM   #15
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you were the one who bent your valves from that cam hey.. maybe something still isn't right... rockers aren't torqued down evenly or the rocker shaft is twisted/bent?? did everything get replaced
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Old 21-04-2007, 02:06 AM   #16
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his cat is hollowed out so it aint cat.

im thinkin maybe stuffed valve springs. making him valve float.
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Old 21-04-2007, 09:33 AM   #17
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No way. Valve springs are brand new so is the head. And there double valve springs as well. i'll find the problem
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Old 22-04-2007, 09:54 AM   #18
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Is this sorted? Can you describe the sound a bit more vividly? Does it sound like metal hitting at 4000 rpm?
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Old 22-04-2007, 06:13 PM   #19
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havent got around to it yet, na its not a metal sounding noise if it was it would be twice as loud and i wouldnt be driving it at the moment thats for sure.
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Old 22-04-2007, 07:46 PM   #20
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take it to a mechanic
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01 AUII XLS Regency Red Ute 4.0L Egas Auto
Mods -transcooler, tickford intake, K&N pod filter, Pacemakers, 2.5 inch exhaust, Crow Cam,

1981 XD Fairmont 351 - 351 Cleveland, ARP bolts, flat top pistons, Stage 3 Dynotec cam, ported 2V heads with 4V valves, Roller Rockers, Weiand manifold, Mighty Demon, 1/2" fuel lines with blue Holley fuel pump, Crane hi-6 ignition, B&M megashifter, C4, hi-stall, shift kit, 3.77 Ford 9" LSD.

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Old 22-04-2007, 10:41 PM   #21
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once the cam is back to normal i reckon it will fix it. we'll find out tommorow night.
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Old 23-04-2007, 12:38 PM   #22
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cam postion shouldnt have much to do with the engine feeling like its hitting a limiter at 4000rpm unless pistons are kissing valves. but you would know that by now if it was that. i would assume valve float would do this but being new valve springs, i doubt they would bugger up so quickly.

could it be something to do with a knock sensor? crank angle sensor?? even something to with harmonic balancer? as that has a lot to do with ignition.
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Old 27-04-2007, 09:48 PM   #23
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Update! the cam was put back to zero by me today and the limiter is now back to normal.
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Old 28-04-2007, 07:59 AM   #24
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good to see you got it sorted mate.

so you going to try retaeding it a bit to see what that dose. :
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Old 28-04-2007, 10:07 AM   #25
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hahaha, im a bit over it really, the car has headwork but no cam, i know it needs a cam forsure but i''ll see how i go in a couplle of months when some new billets come out.
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Old 30-04-2007, 02:10 PM   #26
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i want someone to explain how cam position stopped the car revving past 4g? seems odd, as ppl advance cams all the time and it doesnt affect limiter....
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