Alternator Suppressor
Discussion
Hi everyone,
I've got an alternator whine coming from my old Nissan Pulsar at high speed, rising and falling with acceleration. Does anyone know how to fit a suppressor to the alternator? I've read very mixed reports. Some saying connect to a mounting bolt and the positive terminal, and then others saying absolutely do not connect it to the positive terminal... I've got one of these ready to go...
I've got an alternator whine coming from my old Nissan Pulsar at high speed, rising and falling with acceleration. Does anyone know how to fit a suppressor to the alternator? I've read very mixed reports. Some saying connect to a mounting bolt and the positive terminal, and then others saying absolutely do not connect it to the positive terminal... I've got one of these ready to go...
LOL 
Dont talk to me about grounds I've spent about 6 months chasing my tail there, cleaning terminals, adding new ones. Its a really odd noise actually. It still comes through when the stereo is off. On other cars I've worked on turning off the stereo usually stopped it. Others I solved with grounds or filter toroids on the ignition wire into the stereo. But this one has me beat! Only happens when on the accelerator, if the car is freewheeling at the same revs, silence.
Dont talk to me about grounds I've spent about 6 months chasing my tail there, cleaning terminals, adding new ones. Its a really odd noise actually. It still comes through when the stereo is off. On other cars I've worked on turning off the stereo usually stopped it. Others I solved with grounds or filter toroids on the ignition wire into the stereo. But this one has me beat! Only happens when on the accelerator, if the car is freewheeling at the same revs, silence. It could well be mechanical noise. I've theory I've chased was a vacuum leak somewhere. But after lots of testing and stuff I found nothing.
It is injected. It's a late model Nissan Almera basically. With a ga15de engine for any aficionados out there...
It sounds exactly like electrical noise I've cured before. I have one of these cheapo suppressors now so does anyone know how to fit it? It's just a capacitor is a pretty standard way to cure electrical interference.
I'm not sure where is coming from its only really noticeable at about 60km/h and between 101- 105km/h. So it's hard pin point it. Also the car is built like a bean tin so it's quite noisy at speed anyway.
It is injected. It's a late model Nissan Almera basically. With a ga15de engine for any aficionados out there...
It sounds exactly like electrical noise I've cured before. I have one of these cheapo suppressors now so does anyone know how to fit it? It's just a capacitor is a pretty standard way to cure electrical interference.
I'm not sure where is coming from its only really noticeable at about 60km/h and between 101- 105km/h. So it's hard pin point it. Also the car is built like a bean tin so it's quite noisy at speed anyway.
Edited by trailblazzer on Saturday 15th September 21:21
Exactly. The car has an aftermarket alarm fitted in wondering if it's possible the siren speaker of that might be the source.
Anyway. If it is alternator noise. A suppressor at the alternator should make a difference. I have a suppressor ready to go, do any of you know where to connect it?
Anyway. If it is alternator noise. A suppressor at the alternator should make a difference. I have a suppressor ready to go, do any of you know where to connect it?
Gassing Station | Home Mechanics | Top of Page | What's New | My Stuff