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Replaced Head gasked - lost power.

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Old 05-16-2010, 10:48 AM
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eternal_wndrr
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Default Replaced Head gasked - lost power.

I recently replaced both head gaskets on my '00 Mustang GT. Along with that I had our local machine shop bore the block and installed new LT headers. After putting everything together - my car lost all the power. I checked fuel pressure at the rails - 30psi, spark plugs seem to be alright... it doesn't smoke or has a leak...
My friend thinks it's and ignition problem - the timing must be wrong.
Could this be the problem? If so - what is a fix for it?
Thank you.
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Old 05-16-2010, 11:07 AM
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cliffyk
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My first thoughts lean toward valve timing.

Have you checked the compression?
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Old 05-16-2010, 11:38 AM
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eternal_wndrr
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removed

Last edited by eternal_wndrr; 05-16-2010 at 01:08 PM.
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Old 05-16-2010, 01:08 PM
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Just checked the compression - all fine in all cylinders. Goes by the book.
So could this be the ignition? and if so - what's the fix?


Thank you cliffyk - ruled out another possibility...
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Old 05-16-2010, 02:57 PM
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Frostbitten
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you should be seeing 39-40psi of fuel pressure at idle
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Old 05-16-2010, 03:00 PM
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JC316
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+1

I see 45PSI at idle on mine. I am leaning toward a clogged fuel filter.
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Old 05-16-2010, 04:55 PM
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eternal_wndrr
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Changed the filter - didn't help a bit...
Any thoughts on possible timing issues and solutions?
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Old 05-16-2010, 07:19 PM
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.... anyone?

I just need to know if ignition could really be that issue. As i understand - on this and later model stangs it's no longer set mechanically and requires a tuner.
So before i ditch out a few $$ on a new tuner, I need to know it tuner will really solve the ignition problem and if these symptoms are characteristic of one...
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Old 05-16-2010, 10:41 PM
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Originally Posted by eternal_wndrr
.... anyone?

I just need to know if ignition could really be that issue. As i understand - on this and later model stangs it's no longer set mechanically and requires a tuner.
So before i ditch out a few $$ on a new tuner, I need to know it tuner will really solve the ignition problem and if these symptoms are characteristic of one...
supposed to have the car tuned after you bore the block and install longtubes. That would affect alot. If you have a handheld tuner you can check the ignition timing at WOT with that. A couple degrees of timing can make a big difference in power. If the car is running smoothly I would just take it for a dyno tune
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Old 05-17-2010, 09:16 AM
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Sadly - i don't have a tuner. And don't have that many mods to purchase one. Even more - i can't take it to a dyno tune because it doesn't have any power. I'm thinking on fuel injectors? is there a way to get those tested without sending them out?
Or its possible for timing chain to skip one tooth - what would be the symptoms on that?

Last edited by eternal_wndrr; 05-17-2010 at 11:25 AM.
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