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Help Diagnose if blown motor!

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Old 07-31-03, 12:01 PM
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Racerxrx7

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Help Diagnose if blown motor!

My FD seems to be running on a blown motor. I've checked all the wirirng, manifol leaks, changed sparkplugs, wires, checked the coils and found nothing. I checked the compression and it seemed to be alright it pumped up to 120 psi. That just might be one of the chambers. I was told to check the compression holding the release valve and checking the consistency of all the chambers. I'm going to try that today. Do you guys have any other ideas? Please let me know.

Symtoms: Very hard to start, no power, slow rpm climb.

Old 08-01-03, 01:25 AM
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More info about the car?
Old 08-01-03, 07:03 AM
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Mmm, have you check the boost sensor vacuum line?
Hope your motor is ok
Old 08-01-03, 08:26 AM
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Have you tried pulling a plug and turning it over (with the relay removed)? It should make a "wooshing" noise everytime the rotor completes a combustion stroke. If the beat sounds uneven something is up.
Old 08-01-03, 09:31 AM
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Originally posted by CCarlisi
Have you tried pulling a plug and turning it over (with the relay removed)? It should make a "wooshing" noise everytime the rotor completes a combustion stroke. If the beat sounds uneven something is up.
Exactly.

You should get 3 even (sound) swooshes and needle bumps at around 30-35psi with the check-valve removed...
Old 08-05-03, 03:11 AM
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yep.....it should make a dif noise when it runs if you blew a seal....might sound like a bridge....or just a sick rotary.....
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