318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Electrical

Notices

Electrical All wiring questions.

.
» Recent Threads
Rebuild M44 or S52 swap?
Today 07:21 AM
Last post by Leurper
Today 07:21 AM
0 Replies, 21 Views
Ultimate Supercharger...
06-23-2019 09:06 AM
Last post by Blindsparky
12-11-2019 04:38 AM
101 Replies, 63,076 Views
bc racing or KWs?
12-05-2019 02:48 AM
Last post by Z3nki
12-09-2019 05:41 AM
3 Replies, 602 Views
heater bowden cable fix...
02-25-2012 02:50 AM
Last post by Hotredti
12-09-2019 01:00 AM
16 Replies, 15,398 Views
FS: 17" Style 40 / FULLY...
12-05-2019 09:34 PM
Last post by Meller1
12-05-2019 09:34 PM
0 Replies, 325 Views
FS: Brake UPGRADE Thread...
12-05-2019 09:33 PM
Last post by Meller1
12-05-2019 09:33 PM
0 Replies, 194 Views
FS: E36 M3 OEM Mirrors
11-13-2019 05:39 PM
Last post by Meller1
12-05-2019 09:26 PM
1 Replies, 700 Views
DASC Inforation or parts
12-05-2019 01:15 PM
Last post by pvansickler
12-05-2019 07:38 PM
2 Replies, 269 Views
16 Style 18s set...
12-05-2019 06:35 AM
Last post by 95 clubsport nugget
12-05-2019 06:35 AM
0 Replies, 258 Views
Battery...
11-04-2010 04:32 AM
Last post by runnr548
12-05-2019 05:33 AM
17 Replies, 13,086 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 08-09-2019, 03:34 AM   #1
teamjoe
Junior Member
 
Join Date: Sep 2013
Location: San Juan
Posts: 10
iTrader: (0)
Default Engine Bay Whine and Batt. Warning Light

Hi, Everyone,

I've got an issue with my ti. The issue started earlier today when I was driving home after lunch, and as I turned into my street I noticed the ASC and ABS lights in my dash. I was at AutoZone earlier today getting some NGK plugs, funny enough. I thought, '"Oh, well. Looks like I'll have a little more maintenance to do." I started perusing the forum for what could've triggered the ASC and ABS lights and after some browsing the likely culprit would have been a speed wheel sensor.

I grabbed my things and was going to head over to a trusted shop, to get an exact reading and pinpoint the faulty sensor. Lo and behold, when I tried to turn the engine over, I got nothing. The ACC key position lit everything up, and my alarm unlocked the door so I didn't suspect a bad battery. I always turn on my headlights, even though I know that shortens the lifespan of the H1 bulbs, so I turned them off and tried again but the battery was D-E-D dead. There were warning lights all over the place and the car just wouldn't turn over.

Admittedly, this was an old battery so I thought maybe it's just time to replace. I had some issues last August which turned out to be a bad alternator. When I replaced that I kept the old battery so I figured it was about time the battery went. I borrowed my wife's Honda and drove to Pep Boys where I paid a prorated cost for the replacement Bosch battery.

I slapped the battery on and started her up. Weird. She turned over strong, but the battery warning light was still lit. I hoped the elec. system was getting to know the new battery. Silly me. But the worst of it---and the reason I'm turning to your expert advice---is there's now a loud whine coming from the engine bay, near or around the alternator. I looked again on the forums to look for similar symptoms and came across a thread where user:Jean H.318TI says that if you remove the engine oil filler cap with the engine running and the whine stops, the problem is a bad Crankcase Vent Valve.

I tried that and as soon as I remove the filler cap the idle gets all wonky; the engine gets shaky and the revs increase/decrease. The whine subsides but I think I can still make it out. When I place the cap back on, the whine definitely gets louder. Oh, and the whine is there as soon as the engine turns over, no need to warm her up. I worry, however, because the whine doesnt seem to altogether go away when I remove the filler cap.

What do y'all think? Belts? Pulleys? Bad alternator? Or bad Crankcase Vent Valve? Something else I haven't considered?

BTW, this is a '97 Sport, M44, 5-spd. with 186,628mi. on the odo. I replaced my ICV and air filter recently, so before this little issue my idle was rock-solid. It still is, unless I remove the filler cap. And of course, there's the whine now and that damn battery light which won't turn off. Please help.
teamjoe is offline   Reply With Quote
Old 08-09-2019, 05:39 PM   #2
teamjoe
Junior Member
 
Join Date: Sep 2013
Location: San Juan
Posts: 10
iTrader: (0)
Default

Been doing some more reading, and since I do get idle surge when removing the oil filler cap I think it's safe to say my Crankcase Vent Valve is probably ok. So, it's probably something to do with the charging system. Alternator, or belts. I'm thinking I need to remove the alternator and get it looked at and/or replaced. How difficult is it to remove?
teamjoe is offline   Reply With Quote
Old 08-12-2019, 11:28 PM   #3
Beemernut
Junior Member
 
Join Date: Jun 2019
Location: Michigan's Upper Peninsula
Posts: 22
Vehicles
iTrader: (0)
Default

If you've replaced your starter anytime recently, make sure your starter nuts are tight. That made for some wonky charging issues with my car.
Beemernut is offline   Reply With Quote
Old 08-13-2019, 01:48 AM   #4
FunElan
Senior Member
 
Join Date: Jul 2012
Location: Dodging potholes in SoCal
Posts: 379
iTrader: (1)
Default

Step 1 would be to take the belt off and try spinning the tensioner on the alternator - could just be the bearing in there. The belt comes off really easy with just one bolt that releases the tension on the whole belt drive (except AC). Not a bad idea to just change all the tensioners, especially if they've never been done before. Maybe when you removed the oil cap it just changed the pitch of the whine because the idle changed.
__________________
'96 318ti California Edition- Montreal blue
'68 1600-2-Caribe blue
FunElan is offline   Reply With Quote
Old 08-14-2019, 06:17 PM   #5
teamjoe
Junior Member
 
Join Date: Sep 2013
Location: San Juan
Posts: 10
iTrader: (0)
Default

An update: Bad Alternator! She's back on the road after my mechanic threw in a new one. I haven't replaced the starter. I've had a few no-starts since owning the car (6yrs.) and I always suspected my elec./charging system but one time it was a bad fuel pump and another time way back it was actually the battery. The battery was 5 years old when I replaced it a few days ago. I figure that's a respectable run for the little Bosch. Pep Boys are the only ones who carry these in my area and I only looked for another because it's what was in the car when I bought it from the PO.

The alternator was replaced by a mechanic last June, and I was incredulous that it would crap out after so little time, but I guess it's not unheard of. I'd love to get a new unit from the dealer but it's pricey and according to Pelican the OEM supplier is Valeo. The reman. unit I bought last year at Oreilly comes in an Ultima box, but the replacement I got yesterday had a Valeo stamp on it. Whatever the brand, I hope this one lasts more than 15 months.

I am thinking now, however, to preemptively chase down any electric gremlins. I've had some issues with my euro lights, but I tracked that down to a loose ground cable in the Umnitza PnP adapters. I kinda want to just go in there and hardwire the Euro lights, for peace of mind. But I'm thinking now of replacing the headunit, and maybe y'all can provide some insight. I have the original C43 tape deck in there. I installed a USA SPEC iPod adapter shortly after buying the car and promptly threw out the CD changer in the trunk.I've always noticed a slight ground whine when using the aux port of that adapter and didn't mind since I just used an old iPod anyway and rarely needed the aux function. But, every once in a while I would get a loud piercing ground whine from even the iPod connection. Maybe a wire's pinched or stripped somewhere along the way but I'm thinking maybe this zapped my alternator because if I recall anytime I connected my iPod (or iPhone) to the USA Spec adapter the device would begin charging, even if the car was off. So I'm suspicious and am hesitant to re-connect the adapter.

I'll probably just replace the headunit. Even if I hate the idea of throwing something in there that is aftermarket, I will feel more at ease knowing that the iPod adapter is gone. Am I just crazy here?

Last edited by teamjoe; 08-14-2019 at 06:18 PM. Reason: Formatting
teamjoe is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 08:59 AM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2019, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 79.44 k/92.82 k (14.41%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.