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Discussing Problem with new motor in the 5.0 Mustangs Forum. I have a new motor that doesn't seem to be performing at its best. When ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Newbie
Join Date: Nov 2005
Posts: 12
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Problem with new motor
I have a new motor that doesn't seem to be performing at its best. When I gradually push on the gas the engine performs as expected. However, when I try and take off at full throttle the engine just loses all power. Can you help?
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#2 |
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Hardcore Enthusiast
Join Date: Aug 2005
Location: Chesapeake, Virginia
Posts: 1,716
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give us some more details.....cam size, fuel system, gearing, etc.....
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88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg |
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#3 |
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Newbie
Join Date: Nov 2005
Posts: 12
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I have 165cc ARP heads (61cc), 70mm throttle body, 76mm mass air kit, 24lb injectors, Edelbrock RPM II intake, 1.7 roller rockers, comp cam. What numbers do you need off the cam card?
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#4 |
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Newbie
Join Date: Nov 2005
Posts: 12
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I forgot... I have aeromotive fuel lines and adjustable fuel regulator. The fuel pressure is set at 39psi. The fuel pump is stock.
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#5 | |
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Hardcore Enthusiast
Join Date: Aug 2005
Location: Chesapeake, Virginia
Posts: 1,716
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did you degree the cam or just stick it in? when you say it "loses all power", does it buck and jerk, fall flat on it's face and then take off, or does it feel like something is holding it back?
__________________
88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg |
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#6 | |
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Newbie
Join Date: Nov 2005
Posts: 12
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#7 |
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Regular
Join Date: Aug 2005
Posts: 213
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Make sure the MAF is clean. I had a similar problem with my stock motor, but same exact symtoms. Cleaned the MAF (the wires) and I went from a 16.9@88 to 14.4@95 (bone stock)
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#8 |
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Enthusiast
Join Date: Aug 2005
Location: Va Beach VA
Posts: 587
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Timeing? Advance?
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#9 |
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Newbie
Join Date: Nov 2005
Posts: 12
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Here are the cam specs exactly as on the card:
valve adjustment .000 .000 gross valve lift .544 .544 duration @ .006 tappet lift 276 282 valve timing open @.006 int: 28 BTDC 67 ABDC Exh: 75 BBDC 26 ATDC Specs are for cam installed @108 intake center line Duration @ .050 224 230 lobe lift .3210 .3210 lobe seperation 112 |
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#10 |
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Newbie
Join Date: Nov 2005
Posts: 12
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The timing is set @10 degrees because that is what the tech guy told me to set it at when I installed the diablosport chip.
To be more specific about what it does at full throttle, it just feels like something is holding it back. It just boggs down and won't gain any power unless I let off the gas and slowly apply throttle. |
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#11 |
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Hardcore Enthusiast
Join Date: Aug 2005
Location: Chesapeake, Virginia
Posts: 1,716
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sounds fuel related to me. For a start, I'd ck the fuel pressure.
__________________
88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg |
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#12 |
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Newbie
Join Date: Apr 2006
Location: Thorold, ON, Canada
Posts: 8
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Its probably your fuel pump. The stock pump only flows at 88lph and going by the mods you listed your going to need more than that. Its probably not flowing enough fuel in the high rpms.
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