Calum122 Posted June 1, 2015 Share Posted June 1, 2015 So when in my brothers car we notice the idle drop significantly when the alternator is under load. Now it does this in my car, but not to the extent that it does in my brothers. It will idle spot on at 1000 rpm, turn everything on, heaters on full, lights, dipped and fogs. Then the idle drops to around 400-600 rpm, amazing it doesn't stall. Naturally he is trying to avoid this at the moment. But was just wondering if anyone else has incurred anything similar. Quote Link to post Share on other sites
dwd Posted June 1, 2015 Share Posted June 1, 2015 Have you checked the battery voltage when running? Quote Link to post Share on other sites
Ollieh17 Posted June 1, 2015 Share Posted June 1, 2015 i have a volt gauge ;) Quote Link to post Share on other sites
5e colin Posted June 1, 2015 Share Posted June 1, 2015 my 1 doos the same i never got to the bottom of it new battery and alternator and it still doos it so came to the conclusion that it probly has to do with the idler system we have ( mines deleted ) so could not test further Quote Link to post Share on other sites
Calum122 Posted June 1, 2015 Author Share Posted June 1, 2015 Hmm, yeah he's an electrician so he'll have a gauge. Mine does do it to an extent. I was thinking maybe a bad earth or what not. Cheer though. Quote Link to post Share on other sites
patman Posted June 1, 2015 Share Posted June 1, 2015 Yep I have the same on my GT will idle perfect but it's only when I do up both door windows together the idle will drop alittle then go back up to normal Quote Link to post Share on other sites
Calum122 Posted June 1, 2015 Author Share Posted June 1, 2015 I appreciate a little, but 400-600 rpm. Like literally about to stall terroritory. Quote Link to post Share on other sites
Bluebear Posted June 1, 2015 Share Posted June 1, 2015 When the engine is cold and I have the headlights on etc, most of the time the car does a cold high idle of ~1000-1500 (which is normal?), and then some days it'll be a pain in the arse and idle at 600rpm no matter what, shaking the car to bits. Does my tits in, but the grey unit on the end of the inlet mani (ICV?) was a new item about 2 years ago, so can't be that. I'm wondering if it's throttle body related, or grounds related... Quote Link to post Share on other sites
Calum122 Posted June 1, 2015 Author Share Posted June 1, 2015 Well my brother is a sparks and he's convinced it's ground related. I'm thinking possible a good earthing kit may sort out some issues. His and mine idle spot on. So I don't see what the difference is. Quote Link to post Share on other sites
5e colin Posted June 2, 2015 Share Posted June 2, 2015 deffo not earth related with me i have heavy duty earth points in my bay if the earths on the iacv aint corroded with u guys then thats out of the question to Quote Link to post Share on other sites
Bluebear Posted June 2, 2015 Share Posted June 2, 2015 For as long as I can remember, my GT has always been lurchy at low speeds too, no idea if that's related or not. Quote Link to post Share on other sites
Phil Posted June 2, 2015 Share Posted June 2, 2015 For as long as I can remember, my GT has always been lurchy at low speeds too, no idea if that's related or not.Tps probably Phil Quote Link to post Share on other sites
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