hello I'm new hereI'm hoping for some help.I have a 1990 Bronco 5.8 automatic overdrive 15,000 miles on motor and transmission.started running a little rough so I did your basic tune up plugs,wires,cap and rotor.Nothing changed it still ran a little rough. The bad running issue turned into running extreamly bad with in a couple days. And this is when my nightmare started!
First I want to say I'm far from an idiot when it comes to the automotive world. I've been building top end small blocks for 20+years. I'm the guy that the shop mechanics call when there stumped. I'm the guy that can and will fix anything the right way. So now its my time to ask.
So after running codes, checking and going over the entire fuel system, emissions, ect, the rough shaking idle was still there. Conclusion.. must have some hard to find intake leak. No biggy, in the process of removing intake I pulled the distributor ( like I have hundreds of times before) and out of nowhere I hear the clank of the oil pump shaft hitting the pan. " do I have to say anymore?" But not what I expected to be dealing with. The book says the motor has to be pulled to handle the situation, well I proved the book wrong, not fun.
Sure the **** don't want it to happen again. I went over every nut bolt, vacume line, every bolt to torque specks, its what I do build them perfect.
Get it back together, drop distributor in, and well it wasn't perfect, so I pulled it out to correct the issue and the pump shaft came with it, again! Yes again! There are no words to describe the anger of the unfortunate disaster. This is far from an easy fix. Now I want answers, long forgot about the idle and running issues. After many hours of going over everything, and taking it down to the block, heads off, putting it back together, the bad shaking idle had not changed a all. Same as before I found that my distributor is magnetized and holding pump shaft. Now the problem is its installed once again in the motor. And I'm not pulling it out for nothing. I got my hands on a degausser and unmagnetized while Installed, no choice. It must have been sending crazy Signals everywhere. I believe its caused from cheap rebuilt alternator, where the ac voltage changes to dc current. To much ac, maybe as little as .03 of a volt would do it.just an opinion.
Here is a list of everything I've replaced. And i checked and rechecked before installing,any part that was even questionable. and done one at a time, and clearing codes as I went.
Iat
Tps
Tfi
Air bypass
Idle by pass
Engine coolant temp switch
Water temp switch
Canister purge solenoid
Map
Egr
Evr
Ever solenoid
Igntion coil
Fuel filter
Tab
Tad
Fpr
8 new injectors
Fuel pressure is good at all times
Replace all vacume lines and tested.
I believe the hall pick up is fine, tested it.
I don't believe computer is bad, and its just shakes rattles and don't roll. Any ideas??
First I want to say I'm far from an idiot when it comes to the automotive world. I've been building top end small blocks for 20+years. I'm the guy that the shop mechanics call when there stumped. I'm the guy that can and will fix anything the right way. So now its my time to ask.
So after running codes, checking and going over the entire fuel system, emissions, ect, the rough shaking idle was still there. Conclusion.. must have some hard to find intake leak. No biggy, in the process of removing intake I pulled the distributor ( like I have hundreds of times before) and out of nowhere I hear the clank of the oil pump shaft hitting the pan. " do I have to say anymore?" But not what I expected to be dealing with. The book says the motor has to be pulled to handle the situation, well I proved the book wrong, not fun.
Sure the **** don't want it to happen again. I went over every nut bolt, vacume line, every bolt to torque specks, its what I do build them perfect.
Get it back together, drop distributor in, and well it wasn't perfect, so I pulled it out to correct the issue and the pump shaft came with it, again! Yes again! There are no words to describe the anger of the unfortunate disaster. This is far from an easy fix. Now I want answers, long forgot about the idle and running issues. After many hours of going over everything, and taking it down to the block, heads off, putting it back together, the bad shaking idle had not changed a all. Same as before I found that my distributor is magnetized and holding pump shaft. Now the problem is its installed once again in the motor. And I'm not pulling it out for nothing. I got my hands on a degausser and unmagnetized while Installed, no choice. It must have been sending crazy Signals everywhere. I believe its caused from cheap rebuilt alternator, where the ac voltage changes to dc current. To much ac, maybe as little as .03 of a volt would do it.just an opinion.
Here is a list of everything I've replaced. And i checked and rechecked before installing,any part that was even questionable. and done one at a time, and clearing codes as I went.
Iat
Tps
Tfi
Air bypass
Idle by pass
Engine coolant temp switch
Water temp switch
Canister purge solenoid
Map
Egr
Evr
Ever solenoid
Igntion coil
Fuel filter
Tab
Tad
Fpr
8 new injectors
Fuel pressure is good at all times
Replace all vacume lines and tested.
I believe the hall pick up is fine, tested it.
I don't believe computer is bad, and its just shakes rattles and don't roll. Any ideas??