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1991 Mazda rx7

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Old 07-16-08, 01:35 PM
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Unhappy 1991 Mazda rx7

Hi Iam new to the rotary seen I have 91 rx7 and it won't start I have fuel and I
have spark. I don't have compression on any of the cylinders is there a special way to check this other than a standard compression tester, the guy I bought it
from said it just stopped running one day any suggestions and is that common
no compression on any of the cylinders HELP PLEASE !!
Old 07-16-08, 01:56 PM
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...hope you didn't pay too much for the car because it sounds like a blown motor. Rebuild or replace and you're looking at up to $3K.
Old 07-16-08, 02:00 PM
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where at in South Carolina are you at?
Old 07-16-08, 03:40 PM
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How did you determine you have no compression?
Old 07-16-08, 03:42 PM
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Originally Posted by 7393835
no compression on any of the cylinders HELP PLEASE !!
Yep, I am sure you don't have compression on any cylinder.

The rotary engines don't have cylinders, or pistons, or cam shafts or exhaust valves...
Old 07-16-08, 04:09 PM
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take a spark plug out and turn the engine over. you should hear 3 steady "woosh"es
Old 07-17-08, 01:22 PM
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Originally Posted by rotarybeat1287
where at in South Carolina are you at?
Hi Iam in Murrells Inlet SC just south of Myrtle beach, thank's John
Old 07-17-08, 01:26 PM
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Boosted. I got BLOWN!!!

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It may have been badly flooded. Hold the gas pedal down all the way (don't worry, fuel is cut) and crank for 15 seconds. Wait 15 seconds, then repeat. Do this a few times. Finally, try starting normally. If that doesn't work, push start it
Old 07-17-08, 01:26 PM
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Originally Posted by Bruceman
How did you determine you have no compression?
We just used our standard compression tester which I dont think you can do. I just spoke the previous owner and it happen to him because it flooded, so iam going to try the transmission fluid procedure and then put in new spark plugs he didn't put in new spark plugs and they were wet with gas. Unless you have any other suggestions Iam goung to be working on it tommorrow any info would be
greatly appreciated. Thank's, John
Old 07-17-08, 01:27 PM
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Originally Posted by Icemark
Yep, I am sure you don't have compression on any cylinder.

The rotary engines don't have cylinders, or pistons, or cam shafts or exhaust valves...
Hi What do you think in ran fine the day b-4
Old 07-17-08, 09:54 PM
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Originally Posted by 7393835
Hi What do you think in ran fine the day b-4
Well, it ran fine without cylinders, or pistons, or cam shafts or exhaust valves...

You probably flooded it. Follow the unflooding procedure found in the FAQ for FC sticky thread
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