90 F150 problems

[montesa]

@swampratt
Question for car guys. If I unplug the exciter wire plug on top of the alternator, but leave the belt on, will that cause any damage? I want to drive a short distance just on the battery so I don't cause any damage to the new alternator if it is the battery causing it to get hot.

 

[swampratt]

No issues at all go for it.
No different than driving home when the alternator goes out and just using battery power.

 

[montesa]

Update on this if anyone is interested. Bent the fan blades a lot. Got them all as close to parallel as I could. Whistling went away.

O'Reilly's said my battery was good but I had it on the charger all day and it never got above 83 percent. Voltage while running was reading lower than it should be and the battery was over 6 years old.

Got a new battery and voltage is reading and working correctly as far as I can tell. Starts very fast now too. Gauge in cluster is dead center again. So had a bad battery and alternator it seems.

 

[montesa]

@montesa it acts like it’s starved for fuel if I give it to much throttle. It’s got the pressure gauge on it now. Wanted to check pressure before I pull the bed again. Sure enough, about 22 psi for the front and about 28 for the rear

I read somewhere the fuel pressure should be around 50psi for the 4.9. Could the fuel pressure regulator be causing an issue? Just guessing.

 

[dlbleak]

I read somewhere the fuel pressure should be around 50psi for the 4.9. Could the fuel pressure regulator be causing an issue? Just guessing.

I read that it could be anywhere from 35 to 50. If I can get to the 35, I think I’ll be fine.
Regulator on the way. The closest one in oreilly inventory was sitting in a wharehouse in Houston. Should be here tomorrow. Another $100 part!

 

[montesa]

I read that it could be anywhere from 35 to 50. If I can get to the 35, I think I’ll be fine.
Regulator on the way. The closest one in oreilly inventory was sitting in a wharehouse in Houston. Should be here tomorrow

I have read that if you pull the vacuum hose off of the regulator and see fuel it's bad. Probably just telling you stuff you already know but I like trying to guess ha

 

[dlbleak]

I have read that if you pull the vacuum hose off of the regulator and see fuel it's bad. Probably just telling you stuff you already know but I like trying to guess ha

I had seen that in YT vids a simple test that the diaphragm was bad. The vid I watched last night had a guy with 25 in the rear and 0 in the front. His vacuum line didn’t have fuel in it but it fixed his problem. So, I rolled the $100 dice and have my fingers crossed.

 

[montesa]

I had seen that in YT vids a simple test that the diaphragm was bad. The vid I watched last night had a guy with 25 in the rear and 0 in the front. His vacuum line didn’t have fuel in it but it fixed his problem. So, I rolled the $100 dice and have my fingers crossed.

What the heck? I see them for 20 on Amazon. Where are you buying your parts? That seems crazy to me. I couldn't afford to run an old truck if I paid that much. I could type in your address and have one delivered tomorrow as a gift for being a good dude I'm guessing.

 

[dlbleak]

What the heck? I see them for 20 on Amazon. Where are you buying your parts? That seems crazy to me. I couldn't afford to run an old truck if I paid that much. I could type in your address and have one delivered tomorrow as a gift for being a good dude I'm guessing.

Thanks, I got it coming. Never thought it would be that much but I ordered it anyway.

 

[montesa]

Here's a pic of the truck. I bought it for 1450 in 2018. It says 72k miles but it could be 172 but maybe just 72k. 300 I6, M5OD.

List of what I've done.

Starter
Alternator
Ignition switch
Fender relay
Abs sensor
Shifter bushings on top
Trans fluid
Rear diff gear oil
Headlight harness
Headlight switch (just got dash lights)
Wiper switch
Tail lights
Turn signal switch in column
Tires
Driver side mirror
Window sweeps
A few vacuum lines
Removed carpet and pad, headliner
Replaced emblems
New lug nuts
Serpentine belt
Blower resistor
Signal flasher
Fluids
Probably more stuff I've forgotten

Next I need rotors and pads, blower motor, wiper motor, maybe vacuum issues fixed. Brake lines. A bunch of other things but it starts and runs great and for some reason makes me happy when driving it. If you can't afford a square body Chevy, these are worth a look.