Local parts house didn't have a compression tester in stock (Didn't even know what one was, tried to give me an injector tester). So while I am waiting in mine to come in I made this recording with both leading plugs pulled. Not sure what good seals would sound like, and it dosen't sound like it is missing any strokes to me, but you guys are the pros.

Thanks for listening.


Kyle

 

Did some more testing with what I have available. Checked out the map sensor and line, its reading right as far as compared to my greddy electric boost gauge. Car will start and run but will die if allowed to dip under 1k rpms. Pulls anywhere from 300 to 400 vacuum around 1000 to 1200 rpms.

As far as what happened to make me think the motor was blown. Was cruising around one day and did a hard pull from 3rd to 4th, when I shifted into 4th the car just fell on its face instantly. So I let off and it dies. I pull over check somethings out and fire it up. Nothing seems wrong. Get out and do it again, and once again shifting into 4th it falls flat on its face, this time it dies when I let off and dosen't want to start.

Mods are basically emissions removal, catless exhaust, non-seq twins running 15 psi, HKS twin power, and apexi PFC. Was low 70's the day it happened.

 

Vacuum is in mmHG btw.

 

I can't tell from that clip. Try pulling the leading plug out of only one rotor at a time, as shown in these videos:


https://www.rx7club.com/3rd-generation-specific-1993-2002-16/compression-test-video-what-do-you-see-575605/

-s-

 

Just buy or rent a piston compression tester. You can get one from Sears for about $30.