99 F-150 5.4: disconnecting fuel lines from fuel rail. I have the quick connect tool. It seems impossible. I have not depressurized the fuel system. Should I? Are there any tricks to make this easier? I'm in the process of removing my intake manifold to replace the heater hose assembly under, in the valley between the heads. I have gotten everything, only this remains. Any advice would be appreciated.

 

Yes depressurize the system. If you have a universal metal 4 way style remover tool, you will cuss a lot. You should use the individual styles (Lisle 37000 style kit) to really take them apart. The universal metal type just doesn't work well. After that, it just comes apart very easily. Good luck.

 

Like these.

 

Thank you. Yeah I have the universal style and haven't been successful with it. I will get the others and try them. I have taken pretty much everything off of the top end in the process of removing the manifold, do you have any ideas or tips of how to release the pressure with out having to reassemble everything and pulling the fuel pump relay?

 

On the fuel rail you will see a overly large looking tire valve type fitting. It has a black plastic cap on it. If you take the cap off, you will see a push in valve (like a tire) that you can press to release the fuel pressure. You will need a rag or something to cover it, since it still is carrying about 30# of pressure, so it will throw/spray gas everywhere. Once it is released, you can take it all apart quickly. I'll bet you tried one of these to remove the lines, right? They work terribly. lol Good luck with your project.

 

Hey man thank you very much. Now that you mention it I remember seeing the pressure release valve ( I think that's what it's called) that you're talking about. And yes that's the exact same tool one I tried. I'm going to Autozone tomorrow I saw a set of OEM disconnect tools similar to the ones you told me about. They should work.

 

I just replace mine this week. I paid 7.71 on eBay for the Lisle kit I listed. Best deal I could find. Took 3 days from CT to AK. Not bad really. lol.

You will be glad you make the switch. It works great on all the Ford lines, including the AC and transmission (a/t type only), as well as the fuel lines.

 

They metal ones work the best at the fuel filter tho because they are shorter and easier to realease the springs on the quick connects at the filter.

 

Put a pair of gloves on and be prepared to pull. If they haven't been off in a while. A little wiggle action works well as well. They are just in an odd place and you have to pull backwards to get the lines off.. I've done several. And only a handful were easy. Most f them fought me somewhat. And I have all the proper tools for the job. Keep at it. And it will come

 

The new fuel disconnect tools worked wonderfully. The intake is out, but the steel line that I thought was faulty, appears to be ok. I still need to remove it. Have to run to autozone because I can not find my 10mm wrench anywhere. The hose may have sprung a leak on the back side that I can't see, at the moment. Do y'all have any ideas what else there could be on the rear of my block that could be leaking coolant? It's a very small leak. Passenger side.