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.

Help,Never seen this Before

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Old 02-13-2006, 01:28 AM
  #11  
PRO50SC
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Default RE: Help,Never seen this Before

You could have damaged the injector on that one cylinder. Maybe causing extra amounts of gas getting in that cylinder. Runnin out of ideas, maybe someone else will chime in.

Can you do a compression check on the problem cylinder? Do you have axcess to one?
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Old 02-13-2006, 01:38 AM
  #12  
88reaper
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I actually did a compression test before and after I replaced the valve seals.
Before I replaced the seals this is what they were at 1)= cylinder 1 etc.
before After
1) 160 190
2) 165 200
3) 160 190
4) 165 195
5) 165 195
6) 165 200
7) 160 195
8) 165 195

it isn't just one cylinder, It's the entire header that glows, on the one side from around 2 inches down from the block right to where they hook up to the exhaust. I never touched the injectors, But I guess it wouldn't hurt to check them. I am totally baffeled with this. Such a simple thing to replace the seals. I might be makin a call to the ford dealerships tomorrow.
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Old 02-13-2006, 01:41 AM
  #13  
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ORIGINAL: 88reaper

I actually did a compression test before and after I replaced the valve seals.
Before I replaced the seals this is what they were at 1)= cylinder 1 etc.
before After
1) 160 190
2) 165 200
3) 160 190
4) 165 195
5) 165 195
6) 165 200
7) 160 195
8) 165 195

it isn't just one cylinder, It's the entire header that glows, on the one side from around 2 inches down from the block right to where they hook up to the exhaust. I never touched the injectors, But I guess it wouldn't hurt to check them. I am totally baffeled with this. Such a simple thing to replace the seals. I might be makin a call to the ford dealerships tomorrow.
Have you checked the flow on that side out the t-pipe? Like could it be restricked in any way?
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Old 02-13-2006, 01:53 AM
  #14  
88reaper
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No, there almost brand new, i installed them about 5 days ago when I put in a new tranny, clutch, clutch cable and tranny mount. My car has been blowing a bit of blue for the last month or so, So I finally broke down to replace the valve guides. my neighbor told me that if the timing is retarded enough it can cause the plugs to fire faster even if there is no gas to be bunrt, IE: firing twice as fast then they need to be. Would it be possible for the valves to be open and the plugs firing with no gas in the chamber??Because if that can happen, having 4 plugs firing twice as fast could make headers pretty dam hot. But what are the odds that only the passenger side plugs would be firing twice as fast, and not all of them??
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Old 02-13-2006, 03:41 AM
  #15  
wildcobrar
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I would check all electrical connections and I would also check for vacumn leaks. My guess is something is left unhooked. There are grounds at the rear of the intake and you also have the pvc valve at the back of the intake. Is it out of place creating a lean condition via its port to the intake manifold?
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Old 02-13-2006, 11:30 AM
  #16  
4trax
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Default RE: Help,Never seen this Before

If you don't have wires crossed it will be timing. That's the only thing causing this, timing and or wires crossed.
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Old 02-13-2006, 12:17 PM
  #17  
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I would say that the side that is glowing is running lean OR is in open loop, that would be the reason for glowing headers, check the plugs and wires again, and look for any damage to the injector wiring
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Old 02-13-2006, 12:31 PM
  #18  
angcobra
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Default RE: Help,Never seen this Before


ORIGINAL: 88reaper

I actually did a compression test before and after I replaced the valve seals.
Before I replaced the seals this is what they were at 1)= cylinder 1 etc.
before After
1) 160 190
2) 165 200
3) 160 190
4) 165 195
5) 165 195
6) 165 200
7) 160 195
8) 165 195

it isn't just one cylinder, It's the entire header that glows, on the one side from around 2 inches down from the block right to where they hook up to the exhaust. I never touched the injectors, But I guess it wouldn't hurt to check them. I am totally baffeled with this. Such a simple thing to replace the seals. I might be makin a call to the ford dealerships tomorrow.
I don't understand the compression change just for changing valve seals. What else did you do?
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Old 02-13-2006, 09:21 PM
  #19  
88reaper
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all i did was replace the valve seals. I asked around a few machine shops and they all said it was a common thing to get better compression after putting in new valve seals.
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Old 02-13-2006, 09:28 PM
  #20  
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ORIGINAL: 88reaper

all i did was replace the valve seals. I asked around a few machine shops and they all said it was a common thing to get better compression after putting in new valve seals.
Hmmm, that seems very strange since the valve seals have no connection with compression. Theoretically, you would have had better compression before the install. Provided your rings were worn out. (Meaning, when there is a lot of oil consumption due to worn rings, the compression is better when you sqirt oil into the cylinder prior to the test. The oil helps fill the gap in the worn rings. The bad valve seals could act in the same manner. Although the valve seals would litterally have to be shot for this to happen.) This is again speaking theoretically.
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