Who primes before they start?

[Silver Ecstasy]

Something I have always done when i'm going to start my car after it sitting for a while, is leave it in "On" for a few seconds to prime the engine, then turn it over. Just so I can avoid cranking forever and trying to prolong the life of the starter equipment.

However, when I do it on the MS3, it cranks like immediately. So then I started thinking, does this have anything to do with the direct injection? Also, is this a bad idea to do on our engine?

 

[knowledge007]

I do it most of the time. Pause for approx. 2 seconds. Its a habit that I picked up when I had the standback installed. Also, have picked it up b/c I have had hesitations on cold startups like the TSB mentions without the standback. I don't think it matters considering it has cranked up for almost instantly with out any pauses. But then I get hesitations.

 

[jbiird317]

the engine always turns over right away, i do it in my truck sometimes, but that things an old POS, never thought to do it in the ms3

 

[Ziggo]

With the direct injection system the fuel pump that would "prime" the system doesn't operate at a pressure high enough to be injected. The system will not build pressure till the CDFP runs as the engine turns over.

 

[Silver Ecstasy]

So by what you're saying, priming shouldn't be a big deal because the fuel pump hasn't really started operating until the engine starts to turn over.

The method's pretty much useless?

 

[Absent-Minded]

+1 for someone who primes. I dunno, guess it stuck over the years. Whether it be for fuel pumps, aftermarket ignition systems, or diesel engines.

 

[Jesse MS3GT]

I always prime my cars. I actually have to on my civic lmao

 

[SharkDiver]

Like the other guy said.Your fuel pump dont work untill your cams are turning so just turning on the key isnt doing anything.