NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   Cranks Fast (https://www.nopistons.com/2nd-generation-specific-17/cranks-fast-42205/)

Ricer240sx 12-24-2004 03:26 PM

ok, heres the deal, yesterday, i cranked my motor over to warm the car up before going to work, it started up and then died! so i went to start it again, and the battery died. so i charged it up with the charger and that was gay, it died while cranking so i had to fiddle with the connection and such. eventualy i said **** it and threw the jumper cables on from the Durango and cranked it over. it cranked pretty fast! as in there was no compression!! but i couldnt futs with it cause i had to go to work. so today i went and tryed starting it (had the batterie charger on it sence 4 yesterday!) and it cranked fast again and i heard a scraping noise form the engine as it cranked! this time i didnt get anything out of it, yesterday i at least got a couple sputters here and there, but today nothing!!!



so, does this mean i blew a seal or something?? i take it the scraping would be the remainds of an apex seal, byt i guess i would like a second opinion!

CozmoRX7 12-24-2004 03:36 PM

I'm not sure exactly what kinda "scrape" you mean, lets hope its nothing bad.

What i'd do as a premilary check is just take a leading plug out of each rotor, one at a time, crank over and listen for 3 compression chugs.

RONIN FC 12-24-2004 05:03 PM

Try to unflood it. A badly flooded rotary sounds like its turning freely "no compression" on startup.

HeffSpooled 12-24-2004 07:28 PM

I'm with him^.

Rob x-7 12-24-2004 09:35 PM

once you cant start the car and keep trying to start it, you flood it





unless of course you are getting no fuel to begin with



sometimes these cars get a no start out of no where, they crank like they have no compression

ColinRX7 12-24-2004 11:51 PM


Originally Posted by Rob x-7' date='Dec 24 2004, 11:35 PM
sometimes these cars get a no start out of no where, they crank like they have no compression






Under what condition?

nightwolf_4_98 12-25-2004 12:29 AM


Originally Posted by ColinRX7' date='Dec 24 2004, 09:50 PM
Under what condition?




any? happend to me about two weeks ago, car had been running flawlessly then all of a sudden, a no start and a flood.. unflooded it and had been running perfectly since untill the other night

ColinRX7 12-25-2004 12:39 AM

That's never happened to me, between +35C and -20C, never happened between any of my RX7s. Not once, for any unfesable reason.



I had an engine crank like it had no compression once, that was because it was sitting for a year not-running in storage. After a minute of cranking the compression was back up and it was firing.

nismo convert 12-25-2004 01:02 AM

my car has also done this i attribute this to the shitty ass charging system, the battery some times almost never holds a full charge so it can't crank fast enough so it floods

nightwolf_4_98 12-25-2004 02:08 AM

dont know what caused my car to do it, it was running not even 12 hour's earlier or so, batt was perfect, it was semi warm out, it just didnt wanna start and flooded for some reason, hasnt done it since either


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