bad leak detection pump - 2015 ram 1500

[Lifted2wd]

Has anyone replaced one of these. The part is 24.99 locally, the dealer wants almost $400.00 to replace. I don't see it being that big of a deal. Anyone?

 

[Ken226]

Is this the evap system leak detection chingadera, near the fuel tank or the one in the engine compartment?

I almost changed mine. Just do it yourself, i few hoses to disconnect and an electrical plug.

But, while trying to track down the cause of an evap system "small leak" code, i was all set to replace it.

I crawled under the truck with a flashlight and inspected the part and related hoses, and found not the slightest sign of damage.

It turned out to be a scratch in the metal on the fuel fill inlet. Just enough to let air in when the computer was doing is purge system self test, after the engine reaches operating temp.

My understanding of the system is:
The purge system self test occurs in the background, every time you start the engine. Once the engine reaches operating temp, the purge pump thing opens and puts the fuel tank under vacuum.
It then closes, and measures the amount of time it takes for the vacuum to disappear. If it happens too fast, sets a code for either a large leak or small leak depending on the time.

I polished out the scratch with 400 grit, then 800 grit sandpaper, and lubed the gas cap gasket with grease.

That was over a year ago, and the code hasn't come back.

 

[Lifted2wd]

I will crawl under the truck tonight and check that out. The part is the one that is under the bed, I know there is another one under the engine cover. For what the dealership is charging to change the one I could replace all the parts myself and still be money ahead

 

[RedSRT4Me]

I will crawl under the truck tonight and check that out. The part is the one that is under the bed, I know there is another one under the engine cover. For what the dealership is charging to change the one I could replace all the parts myself and still be money ahead

You'll probably just have till drop the gas tank to reach it. Maybe 2hrs of time at most for install

 

[rotwiler]

I had leak detected, said small leak. I bought the underhood one, came with hoses attached and is like 10 minute install, the other under truck I seen a guy on YouTube replace it and looked simple. I noticed my truck only did the leak code when Temps had big drop outside, like 65 in day and 35 at night.

 

[Lifted2wd]

After picking up the truck from the dealership the code hasn't been thrown. I'm on tank 2 of gas. Might see if it throws before spending the time to drop the tank and replacing the pump

 

[rotwiler]

On leak detection pump code, if you are not under warranty, try to repair yourself. One under hood, the purge one has hoses attached already and is basically plug and play, easy as can be, no mechanical skills needed, could be gas cap seal also or the leak detection pump under truck. Oem gas cap online is like $15 and one under hood is like $50 oem with new hoses attached already fitted for truck. I haven't tried to replace one under truck yet.