After I installed a new Fuel Lab pump I am getting a whine through the speakers. The previous Fuel Lab did not cause any issues, and the stock pump I put in its place while waiting for the new one to arrive did not either.
I added a second ground to the pump which grounds directly to the frame, added a power filter to the HU, tried adding another ground to the HU, still no dice.
You said you added another ground did you remove the first ground? The sterio wine can be a fun one to find, you eater have a bad ground on the pump or sterio, or pup has a issue internaly this sounds more logical as you have had 2 diffrent pumps in with no troubles. I would call the manufacturor first before you go to far and explain the situation and hopfully they will send you a replacement. Also try disconecting you antena it could be traveling in through the ground on their..
Has a simmilar broblem years ago when i first got into car audio. Has a wine in the sterio, replaced every single ground on the car, Alt, Starter, Plug wires, dist cap and anything else that could have gave me electrical interfearance. Not luck i was running about 5 filters trying to reduce teh noise i could make it quieter but never got rid of it totaly and never figured out where it was comming from. Found it easier to sell the car hehe.. Next car sounded much better
Could be the stereo ground as well, or a bad speaker connection, or a power wire to close to a speaker wire. They can be hard to chase down sometimes. But the easiest place to start is what you changed mos recently then go backwards. It doesn't always work out that way, but most of the time it does.
mine is doing the same with a new fuelab. didnt with the old only with the new. thats the only thing that has been changed, wiring and stereo all the same.
Same problem for me with all 3 fuelabs that I have had on my truck. Stock pump made no interference. I can't run my cb with the fuelab either. Interference. I never had one problem with whine in my speakers until I went with a fuelab. Eventually I will be putting dual stockers back so I can use my electronics peacefully. Im glad I am not the only one with the problem. Fuelab told me I am the only one they have heard of with the problem. Guess they were wrong. I bought a fuelab for the reliability...guess I was wrong.
Could be a larger amp draw. Do any of the wires go near any speaker wires. I would also check the stereo ground, could try a solid chasis ground instead of the stock wire. You could also put a ground loop isolator in the stereo circuit. Do you have aftermarket amps or stock? do you have an aftermarket head unit?
Fuel pump wires are ran along the frame-rail, RCA's for amp are on the opposite side and inside the truck. I also tried to disconnect the antenna with no luck.
Same problem for me with all 3 fuelabs that I have had on my truck. Stock pump made no interference. I can't run my cb with the fuelab either. Interference. I never had one problem with whine in my speakers until I went with a fuelab. Eventually I will be putting dual stockers back so I can use my electronics peacefully. Im glad I am not the only one with the problem. Fuelab told me I am the only one they have heard of with the problem. Guess they were wrong. I bought a fuelab for the reliability...guess I was wrong.
i was thinking about that, i ran a larger ground all the way to the battery and it did not get rid of it. maybe i need to do that with a larger power as well? i have an aftermarket head unit and amps, the rca's are grounded and there is an inline filter...
wonder why it would only start doing it once the new pump was in..
Larger amp draw. Maybe see if a ground loop isolator works. The large motors on these big fuel pumps create a larger disturbance by creating an ac frequency in the dc circuit. It can be fixed, I have an airdog and fass in line on mine and a huge stereo system and had the same problem, it turned out to be a bad rca on mine. I usually don't by cheap stuff but I was in a hurry and I paid he price.
Grounding the rca can help, but if it is near a large draw + it can harm the signal. That is why you always run the power down the opposite side of the car than the rca on an amp install. It might not always do it, but when it does it sucks.
i had a filter on the rca's last week like those isolators, and it was not doing anything, gonna give re wiring the pump with larger wire a try and than tear into the rest of the wiring.
The ones that go on the RCA have never worked for me, I am speaking of the ones that go in the stereo circuit. I have not had my hands on one in a while but my friend owns a stereo shop and had them there last time I was up. Let me email him and see what he says. It never hurts to run bigger wire, and fixing the problem is a better solution than isolating it away from the source. Might even make your pump last longer with less voltage drop with the larger conductor.
Sounds like you did everything right brother. I hate when I don't take any shortcuts and really take the time to do something right and something like this happens. I have read a few posts on here of some really bad stereo installs so I didn't want to assume anything. But sounds like larger wire is the next logical step. I wonder if this is happening only on aftermarket head units, or if it applies to stockers as well. Good luck.
Take a piece of stripped wire and ground the RCA wires from behind the HU. I have a newer Pioneer Double din. I guess theres a very tiny fuse in there, and they blow pretty easy. I guess mine was caused by hot swapping the rca wires. When that fuse goes, the unit tries to ground itself threw the rca cables. I got this tip from someone on the other forum. And in my case it worked.
I just took the wire, stripped a long section. Spit the wires into two, wrapped it around each rca plug. (all 6) then plugged the wires into it to hold it tight. Grounded it to the antenna wire. Worked like a champ.
need a capacitor in the circuit, that should take care of the noise, what is the amp draw? I will look tomorrow to see if i can find my book to look up what size it should be
sorry fuel pump between the positive and the negative right at the pump, it will be an electrolytic capacitor, I just need to look it up for sizing. I did this on my electric compressor to get the electric noise suppressed.
It looks like the fuellab is brushless, which causes and issue the way the controller works, is it works on the emf feedback from the motor which can also cause noise in it self. Twisting the pair of wires that feed the pump can help out. I am looking more to see if the capacitor can be used in the circuit without screwing with the controller function. On a brushed DC motor a 0.1 microfarad cap normally will suppress the noise to a suitable range. I would also try to run the pump directly off the battery so the ground does not go through the pcm. If you try that I would run a twisted pair of wires right from the battery to the pump. If that works then I would put in a relay to feed it and use the pcm to operate the relay. Doing it that way may give you some more source separation to reduce the noise.
Maybe that would work. I would be worried about killing the motor on the FP though. I wonder why AM has not dealt with this, Maybe we should all contact the, then the solution is from the maker of the pump. Diode isolating the HU might be something to try as well.
That was the size and type capacitor that I was talking about, I have a question into to another engineer that has more experience with those type motors than I do to see if it will cause an issue with the motor driver. The smallest motors in my field are 500hp 6.9kvac and up motors.
UM, awesome.....
I am going to be building a GSXR600 with and electric motor after my truck gets its transplant done, you mind me pming ya with some Q's when I get to that point.....
Talked to a guy at Fuelab the other day and he told me not to run a capacitor.
He said to wait till my other pump is finished and see it that one makes noise too. I am not exactly sure what that is going to prove, and dont think they are going to warranty a pump that is making my radio buzz.............lol.
Till then I am gong to try and stack another filter on the HU and hope it helps.
That sucks, but I figured that, It would probably interfere with the controller for the pump. I would imagine they would need to do something electrical noise that bad needs to be taken care of. I thought I remember you saying they had a new controller I would be looking at the controller. But there are some things that can be done in the motor to help with the noise also.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Power Stroke Nation
2.5M posts
107.3K members
Since 2007
A forum community dedicated to Ford Power Stroke owners and enthusiasts. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more!