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Old 02-06-2001, 10:38 AM   #1
1Slo5.0
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Join Date: Feb 2001
Location: Colorado Springs, CO
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Unhappy The horses left the pony

When i moved to colorado from Flordia the horses left my mustang seem to have lost alot of bottom end. Befor i moved to CO i swaped the upper and lower to a GT-40p 70mm throttle body and a 73 pro-m mass air. is this the real promlem? timmimg up to 18 and everything else is stock. should i put the stock upperand lower back on?
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Old 02-06-2001, 12:19 PM   #2
Jeff Chambers
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Two words: THIN AIR. Actually, you don't really give us enough to go on. Is this all that you have done to the car? Have you dumped the codes to see if there's an underlying problem? Just the change to the GT-40 with a 70mm T/B shouldn't have killed things, although the 70mm is too large for a mildly modified or near-stock motor. You could always try the reverse diagnosis and start working backwards. Replace the Pro-M with the stock unit and see if things improve. If not, add back the stock T/B and see if things improve. If not, swap intakes...etc. I'd think that something else is wrong though. If you're in a high altitude region, that may be as far as you need to look.


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