Compression test : just unplug Megasquirt?

Reply Subscribe

Thread Tools

Search this Thread

Feb 20, 2009 | 09:04 PM

scottv

Thread Starter

Junior Member

iTrader: (3)

Joined: Dec 2007

Posts: 219

Total Cats: 0

Compression test : just unplug Megasquirt?

Thinking this through here...if I unplug MS that kills the fuel pump and ignition, right? so then just crank the engine while holding down the throttle to get my readings with all plugs removed, correct? thanks!

Feb 20, 2009 | 09:32 PM

therieldeal

Senior Member

iTrader: (2)

Joined: Oct 2007

Posts: 547

Total Cats: 2

From: Northeastern CT

that would work.

personally i just unplug the CAS, but i'm not sure how accessible that is on a miata. with no RPM signal you get no spark, fuel, etc.

Feb 21, 2009 | 02:21 PM

The_Pipefather

Senior Member

iTrader: (5)

Joined: Nov 2007

Posts: 854

Total Cats: 15

From: Troy, MI

No need to unplug the MS, just unplug the coils and hold the throttle fully open, the MS goes into flood clear mode specially if you have a TPS set up for that.