Hos Hosslehoff

Just had air con filled. When it's switched on the revs go up and down until the relay clicks off. Process repeats when cuts back in. Tested pump which is fine. Any help please

Kedlestone

iTrader: (9)

Under idle conditions my newage revs higher when the air con is on, then like yours the revs return to normal when switched off. I think this is probably the norm as the engine is having to turn the air con pump over which I would think puts added strain on the motor under idle conditions, unless mine is fubar'd to?!

Hos Hosslehoff

I wouldn't mind if it revved slightly higher. It goes from 1000rpm to 2000rpm back down to 1000 and repeat

53

iTrader: (41)

Normalish What ECU have you got ?

P1 LTD

Had aircon on all day yesterday needed it! When switched on it rises by a couple 100 rpm! Not like bouncing between 1000-2000 rpm!

Hos Hosslehoff

It's an Apexi ecu

53

iTrader: (41)

May need a tweak for fuel/idle under load, as a 1000rpm indicates it's hunting rather than compensating, had the same on my simtek

Fluctuation is normal by small amounts when A/C is on.

Hos Hosslehoff

Thanks. It could be, just had full rebuild and it could do with setting up again

joz8968

iTrader: (13)

You can change it yourself on the PFC's Commander controller. There's an option for "Idle with A/C on". Make a note of the orignal figure (in case you need to revert back it), then experiment by altering the value up or down to suit. Repeat/change as necessary...

Hos Hosslehoff

Forgive me for being thick but what is a PFC?

joz8968

iTrader: (13)

Your ECU - Apexi "PowerFC"? Well, I'm ASSUMING it's a PFC, no?

If so, do you have the Commander 'wand' thingy too? If so, as per my previous post ^^^

Hos Hosslehoff

Oh yeah I got one of them. Thanks I'll have a look

Hos Hosslehoff

Won't let me adjust it :-(

joz8968

iTrader: (13)

Er, what you mean it won't 'let' you change the value, or what?

I'm confused - it should be perfectly editable.

Hos Hosslehoff

All values are at 0. Won't let me adjust up or down.

joz8968

iTrader: (13)

Something not right there - values should be IRO 850-1050rpm, or whatever. Certainly not "0".

Can you post up pics of that screen? Are you pressing the correct buttons/procedure to try to change the value?

Hos Hosslehoff

Hos Hosslehoff

http://s1197.photobucket.com/albums/...t=IMG_0302.jpg

joz8968

iTrader: (13)

Well, I've never seen that! Not sure whether that's normal?

Hos Hosslehoff

It's the same for all the maps on it. If you plug it into a laptop, the true values appear but the handset is nothing but 0's

joz8968

iTrader: (13)

Weird. I thought the handset, when it was plugged into the PFC, simply showed all the values of the map (in effect, the PFC automatically 'downloads' the info to it).

I had the PFC on my previous WRX, and added the Comm. at a later date, and it immediately displayed all the appropriate map's values on it i.e. I didn't have to invoke it or anything like that.