Cerocool

Question...

I was driving my 7 a bit hard on a cool night and everything seemed fine. It pulled really hard but then when I let off the throttle and tried to come to a stop it was running really rough. I checked all the usual vacuum lines and they were all intact. It would idle at the usually RPM but it was really rough, like shaking the car rough. Now even at higher RPM it seems to be running more rough. A/F gauge is working like usual. Power seems to be the same. Also I have noticed that it floods way more frequently than usual on hot days. Gas milage is roughly the same.

Mods include:
TID
Shroud removed
Electric fan
Air pump removed
Downpipe
Midpipe
RB Y
RB mufflers


So I ran a crude compression test with a piston engine compression tester. The max it would go was 65 psi on the rear rotor. I haven't tested the front rotor yet. Is this normal or is this test not significant?

All the stories I have heard of apex seals blowing include a great loss of power. Since I have not noticed a significant loss of power does that eliminate the possibility of a blown apex seal?


-Paul

SureShot

With the schraeder valve removed, or just held open?

walterh

don't take the valve out, just hold it in. I took the valve out of my gauge to check mine and almost sh*t a brick, when I got no reading. I put the valve back in and held it in. It would give me a reading then.

SureShot

I'm looking at a turbo this weekend.
If I see 65's on the rear, a rebuild will be considered in the price.
(piston gage - relief valve held open)

ViperKillerWannabe

Pretty much if it's under 80 PSI you need a rebuild. Sorry.

Cerocool

I believe the schrader valve was closed on the compression tester. Thats the only way to read it if you only have one person running the test.

I just screwed in the tester in the leading hole and turned over the engine for about 3 seconds and read the gauge.

1987RX7guy

iTrader: (3)

What I did was tape down the valve so it wouldn't hold the air in there. Then I proped the guage up so I could read if from inside the cabin while cranking. I made sure that I had the CAS disconnected held the throttle wide open. I got 90's on all sides.