Quest Alternator Overcharge!!

[rb25drag]

Well I did my Quest Alternator Swap 125Amp, And I am Now Over charging the system 15volts, and my car is cuttting out big time. If I Unhook the alternator and hook up my battery charger on while the car is running, I can do a 20amp charge it runs between 13-14volts on my gauge, and the car runs PERFECT. I can hit the 60amp charge and the Volts rise to around 15 and my car will cut a cylinder or two and poop out. It runs fine on 14 volts. But how can I get the alternator to only charge 14 instead of the current 15volts? Is the Internal regulator adjustable?

[Shocker]

Weird... I'm only seeing 14 ish volts.... Thats with both e-fans on 2 fuel pumps, and w/e lights, ecu, ign box, coils, injectors...

Hmm I think you might be the first to have this problem.

[rb25drag]

LOL, I seem to be the test dumbie on alot of things

Would a Ballast reistor do the trick?

[240z4u]

Is the alternator new? Sounds like a bad alternator honestly.

Evan

[rb25drag]

Ya brand new off Ebay.

[Carl H]

internal regulator is dead.

[rb25drag]

Figures. I emailed the guy, So will see what he says, Also I used my Old pulley B/C the Quest one has a wider belt groove. That shouldn't effect it right?

[240z4u]

Whats the pulley diameter difference? Still, it should not be pumping out 15v.

[rb25drag]

I didn't measure it but physically looking at it the Quest is maybe 1/64 bigger, But I didn't see this as a problem.

The only reason I changed it was b/c the Quest is a 6 groove pulley vs the skyline 5 groove pulley.

[Joe]

Whats the pulley diameter difference? Still, it should not be pumping out 15v.

it doesnt matter, its internally regulated and like carl said, its the voltage regulator thats bad.

contact the people you bought it from.

[rb25drag]

This is there response.

Dear cyco240,

HI, 15 volt is normal, if it's 16 and up it will overcharge. for Nissan quest it's normal. Thank you, steve

- eagleautoelectric Did this answer your question? If not, let the seller know.



So now what do I do?

[rb25drag]

are you guys 100% sure your quest alternators doesn't charge more than 14 volts?

[onepuff]

a car alternator should have a regulated voltage. The amperage is what should be higher on the quest alt. Sounds like bs to me. Bad seller.

[240z4u]

are you guys 100% sure your quest alternators doesn't charge more than 14 volts?

I did the quest alternator swap years ago, and never have seen over 14.5 volts on my dash gauge or at my ECU. Like I said in my 4th post, you have an alternator problem.. I am almost sure of it.

As for pulley dimension "not mattering".... you can spin some alternators too fast and cook the voltage regulators. Been there done that with a GM alternator on my Zcar twice.

Evan

[rb25drag]

ya it seems to be my luck. He wants me to get it tested by a shop. Either way this is going to cost me. My luck never ends!!

[240z4u]

Autozone and carquest will usually test em for free for ya.

Evan

[rb25drag]

Ya the testing is not a problem, But he's making me pay shipping both ways. Which I think is Bs. O well thanks for the help guys. Ill see what I can figure out.

[Sil240]

Yeah thats def a regulator problem.See if you can find a local shop that rebuild them and take it there.Since the eby guy wont help you.Also shyt on his feedback!!!

But I've usually seen around 13.8 - 14.4But i've seen a honda accord running 14.8 stock.But since your car's having problems then you better do something about it before something worse happens.

[StricNyne]

tell him if an *** whippin would fit in the box you would ship that too, nah seriously that does suck u have to pay 2x shipping on it, but is he an ebay store or is he a just a seller, adid u pay via paypal, cuz i think yo can deduct from the money u pay if it gets damage or not as described or something like that

[rb25drag]

tell him if an *** whippin would fit in the box you would ship that too, nah seriously that does suck u have to pay 2x shipping on it, but is he an ebay store or is he a just a seller, adid u pay via paypal, cuz i think yo can deduct from the money u pay if it gets damage or not as described or something like that

LOL, He has a store there. also 100% feedback. I did pay paypal. Its honestly not worth all the trouble. I just want a working alternator.

I called my local battery shop and he said he doesn't see a problem to why it shouldn't run on 15 volts. But the RB says HELL NO!!! it doesn't like it. I just wonder if something else could be screwed up all the sudden?

[Darius]

Is your battery light on in your dash? Also, check the fuse for the battery/alternator. If it is not in good working order, the voltage will fluctuate on the high side. I only know because I accidentally pulled mine out thinking it was another spare. My battery voltage was all over the place proportional to rpm.

[Joe]

i also dont see why it wouldnt run on 15 volts. a running alternator runs around 14 normally so 1 extra volt shouldnt cause too much havok.

[rb25drag]

I have No lights on. The voltage is solid. Doesn't move really at all. But I only leave it running maybe 15-20 seconds at a time b/c it drops cylinders and I don't wanna burn my coils up.

[rb25drag]

i also dont see why it wouldnt run on 15 volts. a running alternator runs around 14 normally so 1 extra volt shouldnt cause too much havok.

Thats what I was thinking. Thats why I hooked up the battery charger and made it fluxuate. Even at 14.4 it doesnt misfire but as soon as the gauge jumps to 14.6 -15volts it starts dropping cylinders.

Can anyone hook there car up to a battery charger with the alternator unhooked and verify its not just my car?

[scooby305]

What is this sellers name? I am about to get a quest alternator- and I want to avoid him if possible.

[rb25drag]

eagleautoelectric

[DriftX]

I got a brand new quest alt (115 amp) sitting in my garage ill sell you cheap to get you on the road.

[rb25drag]

Im in no hurry to get on the road. The car has been setting for 4 years so another week or 2 won't hurt. If it had been 2 weeks ago B/F I bought this POS I would have bought it from you. Maybe you can catch this other guy on here that was looking to buy one. Thanks for the offer tho.

[rb25drag]

Well the alternator had less than an hour on it and it decided to take a DUMP already. AHHH I waste alot of money on Crap parts!!!

[jdmser]

Thought it was weird that after reading this I was driving my 200sx when all of a sudden the battery and brake light came on. Got it home thinking the alternator went on me but, when I put the volt meter on the battery it read 15v. Turns out one of the wires to the brown plug for the alternator broke off. I was dropping cylinders or anything but, the idle was high and super rough. This is on a SR20 so can't really compare. Just thought it was weird.