# Compression Test **URL:** https://forums.speedlife.net/t/compression-test/186415 **Category:** PittSpeed Automotive **Created:** [November 24, 2006, 6:00am UTC](https://forums.speedlife.net/t/compression-test/186415 "2006-11-24T06:00:50Z") **Posts on this page:** 1 **Showing post:** 16
### Author: ![SixSpeed454SS](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@SixSpeed454SS](https://forums.speedlife.net/u/SixSpeed454SS) #### Post date: [November 27, 2006, 5:39pm UTC](https://forums.speedlife.net/t/compression-test/186415/16 "2006-11-27T17:39:26Z")
> [@How to keep yourself as clean as possible ver. Public Bathroom](https://forums.speedlife.net/t/how-to-keep-yourself-as-clean-as-possible-ver-public-bathroom/26106/9): > > unless you interrupt the signal that fires the injectors then yes, it will be a problem. the above only states unplugging the coil, some systems fire the injectors based on rpm signal calculations either from the ecu direclty or from some kind of a transistor pack. Whatever… As I had mentioned before, if you do _not_ open the fuel system up on an EFI system, you should be fine. Aeroking has a Syclone with Multi Port EFI. The injectors are mounted in the intake manifold. The other end is attached to a fuel rail. If fuel is going to spray out of a “closed” system, than you have other problems. Fuel is not going to spray out of the spark plug hole. Fuel is not entered into the combustion chamber as a liquid. It is normally atomized by mixing with intake air. The injector is upstream of the intake valve. Maybe your statement would be true on a “direct” injected vehicle, but this is not what the original question was about. It was about his Syclone. --- _[View the full topic](https://forums.speedlife.net/t/compression-test/186415)._