So I did the external regulator after digging through some forums. Pretty straight forward and it’s working out.

but as of now, after the regulator swap I get the check engine/wait to start/fuel in water flashing from time to time.

also probably another pig to tackle but my voltage reading hasn’t gone up, is that a worn out ASD relay?


might as well add this one onto it, driving at highways speeds I get a loss of power around 60mph and then it shoots back up. Engine slows and turbo psi drops. Just replaced the tps yesterday - didn’t seem to help

1993 5.9 auto trans

 

After installing the external regulator, did you cut the wire from the PCM? Otherwise they will conflict with each other. After that, you should only have the check engine light. The fix for that is remove the bulb. The light are not an ASD issue. TPS only controls transmission OD shift point, it has nothing to do with the fuel system. Start with replacing your fuel filter and lift pump. I would suggest upgrading to a piston type lift pump. Also make sure you have the right fuel cap that is properly vented.

 

10-4 I will cut that pcm wire and I will get to looking into the fuel system. Noticed it wasn’t just at that 60 mph range yesterday. Was all driving.


i appreciate the help! Will check back in

 

checking back in, I thought the regulator itself was grounded to the truck. Do I have to ground the regulator to the alternator w/ a wire?

 

The regulator is usually grounded to the truck body. The alternator is grounded to the engine which should have a cable or strap or two grounding it to the body. Since the battery is connected to the engine block and has a wire going to the body this is usually sufficient but any extra ground from the regulator to the alternator won't hurt. More grounds are usually better.

I scraped the paint around where the regulator mounts and used an external toothed lockwasher between the regulator and the body for a good ground. Been working well for 2 years.

Edwin

 

I add copper anti seize to all my electrical connections including grounds. Keeps moisture and corrosion out. Just to clarify, the two small terminals on the alternator are to the field winding. One terminal goes to a switched battery source such as the auto shutdown relay or ignition switch. The other goes to the, in your case external regulator. The regulator controls the ground side of the field winding like a variable resistor. A little confusing because we are use to varying the input voltage and not resistance to ground.

 

cougar, I figured the issue. I had it all wired correctly but neglected to put a fuse in my fuse buddy 😵‍💫 all is good now with the battery. Might go with the far from stock internal regulator for the alternator sometime soon just so I have the peace of mind.

i appreciate the help along the way!

-Cole

 

Hey FarNorth.
Which fuse slot did you use in your fusebuddy wiring?

 

mick-e

I used the power window fuse slot.