5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old Dec 18, 2007 | 09:14 PM
  #1  
84conversion50's Avatar
84conversion50
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From: New Mexico
Default problems

got a used motor with about 70k miles on it. dropped it in and got it running. so the problems..
low oil pressure. at idle at 10-12. when you start driving it goes up to 30-33 when you get on it and 22 when normal driving. is this a problem? my other motor had 60lbs+

other problem is when i time it to 10degrees like the specs call for it does not want to stay running. but at 22 it idles great but backfires like a fully auto shotgun.
Old Dec 18, 2007 | 09:24 PM
  #2  
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95vertGTS
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Default RE: problems

try setting everything to TDC, resetting the dizzy,and then setting timing to 12* or so
Old Dec 18, 2007 | 09:29 PM
  #3  
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84conversion50
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From: New Mexico
Default RE: problems

it dont want to start then itll just turn and sometimes try to kick. im wondering if im 180 off but i cant check till the morning
Old Dec 18, 2007 | 09:43 PM
  #4  
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mx07gt
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From: United Socialist States of America, Comrade.
Default RE: problems

with the engine running....take the oil cap off... does air sputter out?
Old Dec 18, 2007 | 09:46 PM
  #5  
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84conversion50
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Default RE: problems

there is a hole that t's off on the oil cap. dont know what it was for but its just open now. what would it mean if air did sputter out
Old Dec 18, 2007 | 10:20 PM
  #6  
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84conversion50
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Default RE: problems

nm duh itd be blow by but why would that cause that?
Old Dec 18, 2007 | 11:37 PM
  #7  
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mjr46
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From: West Virginia
Default RE: problems

ORIGINAL: 84conversion50

got a used motor with about 70k miles on it. dropped it in and got it running. so the problems..
low oil pressure. at idle at 10-12. when you start driving it goes up to 30-33 when you get on it and 22 when normal driving. is this a problem? my other motor had 60lbs+

other problem is when i time it to 10degrees like the specs call for it does not want to stay running. but at 22 it idles great but backfires like a fully auto shotgun.
22 for a base timing setting is = too much..set to spec and if it won't idle make sure dizzy is not a tooth off or two and if it won't idle then try adjusting the carb
Old Dec 18, 2007 | 11:40 PM
  #8  
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84conversion50
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From: New Mexico
Default RE: problems

it wont start at all at 12. but would that cause low oil pressure also? or is that low
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