48V vs 58V FICM
 

It appears that I have a bad FICM, based on the test procedure in the Tech Folder. So, now I'm looking at replacing it. What's the difference in the stock 48v version versus the 58v upgraded version, other than the obvious voltage difference. Do I gain reliability, performance or what? Likewise, is the change in programming worth the money? What do you see from that?

Thanks for the help!

The 58V version supposedly helps with injector stiction and supposedly the higher voltage FICM's are a little higher HP. Reliability has always been a question, but Swamps claims that after more than a year of doing this upgrade they haven't seen any issues with FICM reliability. As far as reprogramming goes, the PHP reflash has been reported to give a little better MPG and better throttle response.

Ive check out a few trucks that had the "58v" mod. they were closer to 53v

Did you read them with a meter at the FICM or from IDS? I know that AE can't read over 52 on the FICM and wonder if IDS is the same.

So, what I'm hearing is that there isn't a large difference in one versus the other? If that's the case, I might as well go with the cheaper version.

with an ids.... I never thought about that being a cause.

rockauto.com sells a FICM for 305.00 remans +core charge search rockauto discount code thats 5% off

What would the higher voltage do to the injectors???

That's a good question I've never heard a good answer to. It seems like it'd be sorta like running a 12V light bulb on 20V. Maybe not all that good on the coils.

That may be true, but think of it this way. A light bulb is on continuously, where the injector is turning on and off 325 time a second at idle. the more voltage the more confident you are of a positve on and off cycle. I think the more volage the better is true, less missfires.:-D

Regardless of how often it is on or off, you are still putting more voltage through the coils than they are designed for. When working properly, they don't misfire at 48V, so why would I want to put 58V through them?

more electricity = larger magnetic field around coils.. so it should have a little bit more force to open then, and help stiction.

now about added hp, dont know if that really happens.

Insulation is rated in resistance to ground based on voltage. Is there any proof that the increase in voltage does not hasten the break down of the insulation?

I think the math comes out to 5.4 injector cycles per second, or 325 times per minute based on 650 rpm.

So if 58 volts is better then 48 volts, then why isn't 70 volts better then both? JMO 58 volts is a sales gimmick.