Fuel Pump would not shut off.

[mange1234]

Fuel pump would not shut off in the normal 2 seconds on my 1993 Ford Explore. As mentioned in earlier thread, I opened the PCM and found a burnt lead on a 47 microfarad cylinder type capacitor. Otherwise, the solid state circuit board looked in good condition.

I purchaned a new 47 micro farad capacitor from the Radio Shack for less than $2,00. replaced same and tested Suv.

The problem vanished, and my old hoopy runs good.

I hope this info will help. Because many questions have been asked about this problem.

Mike in Virginia Beach

 

[Anime]

You should replace the other two capacitors as well, they will eventually leak.

The Radio Shack caps aren't very heavy duty, it's best to replace caps with the higher 105 degree temp models that can handle automotive applications. The regular 85 degree caps might be ok for awhile, but won't last nearly as long.

 

[mange1234]

Change other two capacitors.

You should replace the other two capacitors as well, they will eventually leak.

The Radio Shack caps aren't very heavy duty, it's best to replace caps with the higher 105 degree temp models that can handle automotive applications. The regular 85 degree caps might be ok for awhile, but won't last nearly as long.

That crossed my mine. But, was getting real serious about just getting off of a hundred bucks and buying one at Auto Zone. I am not too impressed with my solder job. Dont have the proper tools or the skills to make major repairs on a circuit board, for a reliable repair.

Thanks for the info. I think you just pushed me over the edge, and convienced me to buy new PCM.

I want a reliable vehicle. And, for a few hundred buck, it will be worth it.

Mike in Virginia Beach

 

[Anime]

You could always just buy the caps and have someone else who can do the repairs install them.

You can't get new PCMs anymore, but you can get refurbs at auto parts stores and online. The problem is they want your old one back as a core. I would say it's generally a good idea to always keep your original PCM unless it's toast.

If you decide to get one, you could try Advance Auto Parts, buy online and use a coupon (they have 30-40% off coupons if you look around). They might even have the correct PCM in stock at a local store that you could pick up. Be sure to get the same part number and four digit code as on the original.

 

[mange1234]

Refurbed PCM

You could always just buy the caps and have someone else who can do the repairs install them.

You can't get new PCMs anymore, but you can get refurbs at auto parts stores and online. The problem is they want your old one back as a core. I would say it's generally a good idea to always keep your original PCM unless it's toast.

If you decide to get one, you could try Advance Auto Parts, buy online and use a coupon (they have 30-40% off coupons if you look around). They might even have the correct PCM in stock at a local store that you could pick up. Be sure to get the same part number and four digit code as on the original.

Hello,

You have answered my questions before I ask it. My question was going to be, are the one at the auto stores refurbished. If so, they are as old as my pcm. So, what will I prove by replacing the one in my Explorer now.

The one I repaired looked excelent, except for the one corroded leg. Other leg was in good shape.

So, what do they do when they refurb them? Not much, I suspect.

Thanks for the info. Think I will take just put my PCM back in and check it once in a while to make sure the other two capacitors have not started leaking.

I drove my "hoopty" today, and it runs good. It is a little beat up. But, appears to be in good mechanical shape.

Thank you all very much for the ifo. Because of this forum, an old retired guy has wheels. lol

I will contenue to upgrade my truck. Having fun with it.

Mike in Virginia Beach.

 

[Anime]

All they do when they refurb them is replace the caps, and clean the board if any leaked. That's it.

You should replace the other caps because they WILL leak. The caps Ford used in these are known to leak, and when they leak, they leak very, very corrosive electrolyte.

Replacing them ALL with good quality (preferably Nichicon) 105 degree caps of the same rating will extend the life of the PCM another 10-20 years.

If you can replace one cap, you can replace the others. It's not super critical, but next time you can, you might want to pull it out and replace those too.

 

[mange1234]

All they do when they refurb them is replace the caps, and clean the board if any leaked. That's it.

You should replace the other caps because they WILL leak. The caps Ford used in these are known to leak, and when they leak, they leak very, very corrosive electrolyte.

Replacing them ALL with good quality (preferably Nichicon) 105 degree caps of the same rating will extend the life of the PCM another 10-20 years.

If you can replace one cap, you can replace the others. It's not super critical, but next time you can, you might want to pull it out and replace those too.

Great information, Thanks a lots. I going to go out and buy a good high wattage pencil type soldering iron and two more caps. And, replace. As I said in the previous threads, the board looks in excellent condition, totherwise.

Mike in Virginia Beach

 

[Anime]

Two of the caps are 47uF 16V, the other one is 10uF 63V. You can use caps with a higher voltage rating but not lower. You can also use larger size caps as long as they fit under the cover.