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I am reconditioning my 88 GT and found this under the passenger side front carpet. What is it?

Alternator tested good. Oreillys has idiots working for them I guess. They showed a triple failure on their machine and 11 volts output after fumbling with the test machine and connectors guessing at each step. I got a second opinion from a man who has been rebuilding alternators and starters...

I will go through all the tests in your post again. That is how I found my alt bulb had gone out before. I am at work from 630 till 5 so my time is limited each day. I have several off days coming up and I will devote several hours to these tests and will post each reselt.

Added a 4 gauge ground wire and now im getting 14.4 to the battery and improved charging. Still getting 17 to 20+ fluctuating at the alt lug using chassis ground. 8 to 10 when grounded at the alt test ground bolt. Getting 3 to 6 volts at the valve cover bolt.

We are going to go after grounds first. Can't do anything but help our cause. 1 gauge from block to recommended sway bar mount. My current ground is totally insufficient as I have 2 gauge coming from the battery and the OEM 5.0 engine block ground to the chassis. Next will be the negative...

I am about ready to chunk this battery relocation kit and put my battery back up front where it started. I will have the alt tested again tomorrow after work and see what their machine says its putting out.

I took the 4 gauge cable off the alt last night and soldered a new lug with the smallest hole I could find. 5/16 is it and it is making good contact. I took the black/orange wires off the alt and taped them up like suggested. Worked on this with my brother all afternoon. He is much better...

That signal wire comes out of the single connector recepticle at the back of the alternator and goes down with with the black/orange wires and is bundled in harness wrap then goes straight back to the alternator in the center pin of the 3 wire connector. I found where the black/orange comes out...

Damn, you are right! Damn damn damn!!! Right in front of my face and it never ever clicked this was a major catastrophe waiting to happen. THANKS!!!!!!

I thought I fixed my charging problem and a day later here it goes again. Getting 17-18 volts at the back of the alternator and its not making it to the battery. I suspect the signal wire to the alternator is not connected good hence the overcharging voltage. Im taking loose wires at each...

Why do some say to install the two black wires back on the alternator and other say not to and tape them up? I have a 4 gauge cable on it plus the two black wires.

You will be spending some money. Get ready. My swap extended over several years where I went back and modified or changed things. Determine transmission FIRST! Everything attached to the rotating assy needs to be balanced so make your mind up or you will have to tear it all back apart to...

You will be spending some money. Get ready. My swap extended over several years where I went back and modified or changed things. Determine transmission FIRST! Everything attached to the rotating assy needs to be balanced so make your mind up or you will have to tear it all back apart to...

Im trying to resolve any issues before converting from carburetor to the FiTech EFI system. No sense in compounding and confusing issues .

I dont believe I have that connector anymore. All of my EFI harness was pulled for the swap. I believe the connector you are talking about was a ground.

I edited my original post because I had turned the ignition off for the test. Green/red shows voltage now and I now have an AMP red light on the cluster. I have 4.7 volts from the rear of the plugged in connector at the green/red wire. With the engine running I am seeing 14.1 to 14.3 at the...

88GT w/351 C swap. 3G alternator upgrade from Mr. Alternator from way back when they first appeared. Batt just tested out good. Alternator tested good. Starts out at about 14.3 V when running and depletes the battery and this reading falls gradually. Starts initially just fine with a...

It was new back in 97 when I got it but sat in the box till 2013 when I completed the engine swap. The stumble happens when I stomp it at about 2000 rpms. It stumbles and cuts completely out then the engine takes off. Also when slightly increasing the throttle a slight stumble can be felt...

I am having a hell of a time with this 750 Carter AFB on my 351 Cleveland. I have changed rods, jets, vacuum springs, and accelerator pump setting and still have a terrible hesitation or stumble at about 2000 rpm when accelerating or going to wot. It will basically die then take off like a...

I installed my mishimoto unit with a dual relay and dual thermostat setup as a stand alone system. Just connected them to a battery pos source. This way your can adjust when one fan or another fan comes on and at what temperature. Also it cools the engine after you shut it down.