rev's dropping when braking, only when the motor is cold and lights are on Options

[xkillerx]

this has been happening for quite some time now. during night (aka lights on) when i brake, the rev's drop down to 200-400 rpm's. once it even stalled. during the day (lights off) this never happens. when the motor warms up it doesnt happen either. it's really weird. it doesnt matter if i'm in neutral or in gear or clutch pedal depressed. the car is a 97 euro st stock, has a b'f' aftermarket audio system (thanks k-esd for the wiring instructions) and the only thing wrong with it is a slippy clutch (which hopefully i'll replace soon). other than that it's perfect. any ideas?

[quicknstyle]

ever see your battery light on? could be a really low battery, or your alternator is starting to go...

[bindertch]

Depending on how many amps or watts you system is it could be using more power than the alternator can supply. Is your stereo on during the same times that it wants to die? Also like quicknstyle said it could be your charging system. I would try to get it to repeat it with different things or take it to a shop that can test you alternator and charging system.

[xkillerx]

the car always starts on the first crank no matter how cold it is or what i did with it previously. it happens regardless of whether the music is working, the abs, power steering, defroster is active etc...

[midengine3sgte]

make sure that your grounds have good contact.

[xkillerx]

make sure that your grounds have good contact.

thank you i will check that. btw, it happened today during the day too

[alltracman78]

Yes, bad grounds, bad contacts, or bad wiring can cause this.
Check the bulb sockets for corrosion too.

[mikeismad0408]

if im not mistaken you may have a vacuum leak somewhere as well when you apply your brakes its pulling your idle way down, never happened on my celica, but on my old ford i had it used to do that quite a bit...

This post has been edited by mikeismad0408: Mar 23, 2007 - 1:38 PM