think my alternators on its way out

[e46jase]

ive been having a idle problem for awhile now my car idles slightly lower than it should and once it drops to say 500 rpm if i pull off without giving petrol it makes this growl sound and i do have a tear in my lower intake boot which could be part of my idle problem BUT i recently realised that when i put my headlights/fogs on the revs drop slightly almost like the alternator cant handle the load watcha guys think?

 

[nawtiboy]

ive been having a idle problem for awhile now my car idles slightly lower than it should and once it drops to say 500 rpm if i pull off without giving petrol it makes this growl sound and i do have a tear in my lower intake boot which could be part of my idle problem BUT i recently realised that when i put my headlights/fogs on the revs drop slightly almost like the alternator cant handle the load watcha guys think?

test with a mulitmeter - you will be able to see a voltage drop on the battery.
can be a loose or faulty cable
alternators either charge normally or don't at all
try patching up the tear and see if there a difference
normally the engine automatically adjusts when theres a load

 

[freerider]

My money is on that tear, is it before or after the MAF?

Also what naughty said, if it was the alternator you would know about it Also check your battery, has it ever been changed?

 

[e46jase]

tear is after the maf its the lower boot think ima fix that up first like you guys said . my car stood for quite awhile and battery died few weeks ago so mayb my battery on its way out its prob pretty old thanks for the help guys

 

[freerider]

unmetered air going in, and also that battery doesnt sound healthy

There was a guy in Australia that had his car on the dyno and it wasnt performing properly, they replaced the battery and he picked up 18kw immediately

 

[e46jase]

wow lol i tend to underestimate how many issues a bad battery can cause when my bat died a few weeks back i switched on ignition and my dials started buzzing and i thought id messed something up when i did the kokie mod then realised bat was dead charged it and the buzzing went away lolers :clap: