Low battery voltage after turbo change
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5th Wheeling
Joined: Mar 2024
Posts: 49
Likes: 4
Low battery voltage after turbo change
So, several months back, i put a set of UDP 205/30 injectors in along with a PHP hydra in my 97 powerstroke. I held off on doing the turbo until the kc 300x gen 3 came out. So, after injector install, she ran beautifully and no battery drain. Ran it for about 2 months with no issues. Then, finally KC dropped their turbo, which is a OBS to superduty turbo conversion. Did the whole install and now my batteries show low voltage.....like below normal and it takes forever to get back to where it usually is, if it does at all during my 20 minute drive to/from work. Usually reads about 3/4 on dash. I don't see any pinched wires and since I didn't need to pop the valve covers, I know it's not anything in there. The only thing really is does the EBV wire need to be capped off, could that be causing the battery drain? I do have it taped off. Thanks
Lead Driver
Joined: Apr 2016
Posts: 7,170
Likes: 1,331
From: Bahstun
GPR always on can happen
if its not that when was last time you cleaned your terminals?
cleaning tips here and battery test
https://www.ford-trucks.com/forums/1...ou-cranky.html
Alts can go bad or the connectors going to them can get corroded.
Have 12v at the alt lug? There is a fuseible link near starter realy that can break with age
if its not that when was last time you cleaned your terminals?
cleaning tips here and battery test
https://www.ford-trucks.com/forums/1...ou-cranky.html
Alts can go bad or the connectors going to them can get corroded.
Have 12v at the alt lug? There is a fuseible link near starter realy that can break with age
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5th Wheeling
Joined: Mar 2024
Posts: 49
Likes: 4
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Lead Driver
Joined: Sep 2002
Posts: 9,476
Likes: 2,009
From: North Texas
See if alt is putting out juice at the lug on it. Then go to the solenoid to check Then go to the battery.
I would not rely upon the dash gauge
I would not rely upon the dash gauge
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Thread Starter
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5th Wheeling
Joined: Mar 2024
Posts: 49
Likes: 4
I can also tell that it's low on juice......harder to crank and it puffs white smoke on startup and clears up after about 10 seconds. After I put my injectors in and before turbo, it started beautifully and no smoke......so I definitely don't have as much juice as I should
Lead Driver
Joined: Sep 2002
Posts: 9,476
Likes: 2,009
From: North Texas
Totally could be unrelated to the upgrades, bust out that DVOM and check voltage. Talking more time to grab the tools, a drink, and open the hood.
Hell, weak batts tax the alt enough you see low voltage.
Hell, weak batts tax the alt enough you see low voltage.
Lead Driver
Joined: Sep 2002
Posts: 9,476
Likes: 2,009
From: North Texas
Man, at this point means nothing. I have have fresh that are weak starts, no clue why. I assume **** build quality. Pain in the *** to swap.
Buy this lil guy or hit parts store. Guy on 87-96 page recommended BELOW IMAGE
Edit - Link was bad.
Buy this lil guy or hit parts store. Guy on 87-96 page recommended BELOW IMAGE
Edit - Link was bad.
Last edited by Hit Man X; Apr 22, 2026 at 08:33 AM.
Thread Starter
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5th Wheeling
Joined: Mar 2024
Posts: 49
Likes: 4
But why would the batteries be effected after a turbo change. It was fine before, both batteries new. Not seeing pinched wires that I can tell. Could all of the penetrating oil I used to soak the bolts have drained down towards the started and caused this?