MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: john87 on February 07, 2015, 08:24:59 pm

Title: Clever engine/alternator
Post by: john87 on February 07, 2015, 08:24:59 pm

Was jump starting a friends' car today with my R32, which was idling away at 600rpm, and the car in question was having a bit of bother starting (its HT leads don't like the winter).

After a couple of attempts at starting, my cars' idle increased to about 900rpm and it stayed there for about 30 secs after we started the other car and took the jump leads off.. I'm guessing the mk5 has some kind of electrical system that knows to increase engine revs if there's a heavy load on it? You learn something everyday  :drinking:

Title: Re: Clever engine/alternator
Post by: GrayMK5GTI on February 08, 2015, 11:26:18 am

When you switch on the A/C the revs increase as well. This is fairly standard on ECU controlled engines these days  :happy2:

Title: Re: Clever engine/alternator
Post by: john87 on February 10, 2015, 10:01:06 am

Quote from: GrayMK5GTI on February 08, 2015, 11:26:18 am

When you switch on the A/C the revs increase as well. This is fairly standard on ECU controlled engines these days  :happy2:

Yeah I'd noticed this when the A/C was on, I'm guessing it's just the ECU detecting the extra load on the engine and increasing the revs to compensate  :drinking: