Best 3G Alternator
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4th Gear
Joined: Jul 2023
Posts: 4
Likes: 0
From: Illinois
Best 3G Alternator
Hey all. 1st post.
My son and I are in the process of redoing a 1973 F100 with a 390. We have already done the fuel system and added a Holley Sniper 2. We are getting a lot of issues once it is hot. I am tracing it down to electrical issues. We still have the stock 1G alternator, and I do not think we have enough "juice" to run the system.
What model, and year is the best 3G for me to swap out with? I am also going to replace all the grounds, and battery cables.
My son and I are in the process of redoing a 1973 F100 with a 390. We have already done the fuel system and added a Holley Sniper 2. We are getting a lot of issues once it is hot. I am tracing it down to electrical issues. We still have the stock 1G alternator, and I do not think we have enough "juice" to run the system.
What model, and year is the best 3G for me to swap out with? I am also going to replace all the grounds, and battery cables.
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4th Gear
Joined: Jul 2023
Posts: 4
Likes: 0
From: Illinois
Yes it is still charging the battery. We are finding that once the engine is hot, the AFR goes wonky and it starts cutting out. I have already replaced the O2 sensor, and are tracking back to EL at this time. Fuel Pressure is solid.
Tuned
Joined: Jun 2018
Posts: 458
Likes: 123
From: Arkansas
So this thread/post I remember seeing on here immediately came to mind https://www.ford-trucks.com/forums/1...l#post20577928
I've seen a lot of videos and whatnot about RF interference causing issues like this, coming from the distributor/coil/alternator. I've never messed with one though
I've seen a lot of videos and whatnot about RF interference causing issues like this, coming from the distributor/coil/alternator. I've never messed with one though
Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
check the stickies, your answers may be there.
https://www.ford-trucks.com/forums/1...l#post20013315
https://www.ford-trucks.com/forums/1...l#post20013315
Tuned
Joined: Jan 2016
Posts: 311
Likes: 35
I went with the 1994-1996 Taurus 3.8 V6 (bought it from RockAuto), comes with the soft-start regulator which delays load to avoid belt squeal. I bought this pigtail: https://vintageautogarage.com/3g-ford-alternator-plug/ and I was already wired up for a 1-wire alternator so I had the correct cables and circuit breaker already setup.
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Fleet Mechanic
Joined: Jul 2013
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From: NE Ohio
if you read thru it than you would know what alternators are the best ones to use and which vehicles they came in.
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Thread Starter
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4th Gear
Joined: Jul 2023
Posts: 4
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From: Illinois
Wow. Nice response. I was actually talking about the section on the RF Issues with the Holley.
Tuned
Joined: Jun 2018
Posts: 458
Likes: 123
From: Arkansas
If you specifically want a 3g, disregard, but I went to a GM style 1 wire (I believe this exact one https://www.summitracing.com/parts/sum-810308/, you can get them in higher Amps) and I didn't cut up any of the factory harness, just ran the factory output wire (Yellow I believe) from the 1 wire alternator output terminal bypassing the factory regulator. Not to keep trying to steer you one way or another. I believe you will lose function of the factory gauge as it is regardless.
Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
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From: NE Ohio
https://www.efisystempro.com/efi-pro...r-rfi-problems
Mountain Pass
Joined: Jan 2021
Posts: 141
Likes: 46
From: Austin, TX
I know I'm replying to an old post, but if you haven't picked one out yet I can personally recommend MCR's 1-wire units. https://www.motorcityreman.com/ford-...lternator.html
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