I am running out of stuff to check... - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 6 Old 09-03-2002, 06:26 PM Thread Starter
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I am running out of stuff to check...

OK, here is the list of stuff I have done so far...

New plugs gapped @ .045

motorsport plug wires

cap & rotor

timing @ 14

tried running the timing at 35* base with no spout, made no difference (to check the pickup in the coil)

New fuel filter

Had the TFI checked, its OK

new coil

Ran it with the MAP unplugged, it ran exactly the same, but with a check engine light.


what else is left? valve springs? timing chain?

it pops and breaks up above 4300 or so, just has no power and starts backfirng through the intake and exhaust (just a few POPS)


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post #2 of 6 Old 09-03-2002, 06:31 PM
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valve springs are pretty notorius for going bad on these things when you hit the 90,000 mile mark

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post #3 of 6 Old 09-03-2002, 06:46 PM Thread Starter
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Quote:
Originally posted by Mike Gager
valve springs are pretty notorius for going bad on these things when you hit the 90,000 mile mark
do those symptoms sound right for valve springs?

I dont feel like pulling this thing apart..ugh

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post #4 of 6 Old 09-03-2002, 07:04 PM
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actually yeah, weak valve springs will cause the valves to not open and close as they should at high rpms which would cause a loss of power and possibly backfiring either through the intake or exhaust (the valves would be staying open to long and would maybe release combustion into either/or)


be a good time to install a set of 1.7 rockers while you have it apart



FWIW my truck shifts out of first gear @ 5300 rpms and pulls hard all the way there
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post #5 of 6 Old 09-03-2002, 07:10 PM Thread Starter
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Quote:
Originally posted by Mike Gager
actually yeah, weak valve springs will cause the valves to not open and close as they should at high rpms which would cause a loss of power and possibly backfiring either through the intake or exhaust (the valves would be staying open to long and would maybe release combustion into either/or)


be a good time to install a set of 1.7 rockers while you have it apart



FWIW my truck shifts out of first gear @ 5300 rpms and pulls hard all the way there
maybe its time that I pull the heads and go over this POS

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post #6 of 6 Old 09-10-2002, 10:26 AM
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Sounds like it could be a fuel pump.
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