American Motors Xperimental full frame by Ron S

3 minute(s) of a 140 minute read

EFI tech: When you can't get a new efi project to start, don't pour gas down the plastic intake manifold. Because although it may fire off several times, the belly that you don't see in the bottom of the manifold holds fuel, the fuel has no way to get out(well almost no way). If it backfires, or when it backfires, there will be a big explosion and plastic off the manifold stuck to the ceiling. Come to find out the hose inside the fuel tank had a pin hole in it bleeding fuel pressure, I did finally figure it out with help from my buddy Troy, and it runs great. Now that the truck is running, it will be AMX time.

On a side note, my pedals did come in today.

2-9-2013

I kind of deserve a hard time for this one. The volt meter showed both the coils and injectors were getting power but, it wouldn't fire off. So to figure out if it was a fuel problem or not I used a water bottle cap full of gas, poured it in the throttle body and it fired right off sputtered and died. Thought maybe the fuel system needed to be bled. Plenty of pressue at the bleeder on the fuel rail. Tried the cap of gas several more times, started, sputtered, and died (pulling the pin on the hand grenade). Changed a bunch of wires I knew were correct on the harness (throwing the hand grenade), and hit the key again, and it was shrapnel time. Not only did plastic shards go everywhere, but the liquid fuel went everywhere (everthing was on fire).Thought it was a nitrous back fire, but no nitrous!!

In the end it only had 25psi of fuel pressure instead of the 58psi required, a small pin hole in the hose between the fuel pump and the top of the tank was bleeding off pressure not allowing it to run(what a pain to find, had to pull the bed back off the truck to get to it). I only posted this to try and keep someone else from feeling like the dumb as$ that I do. As you can see in the pictures the Hemi manifold as well as the Ls manifolds will hold alot of fuel which has no gravity direct route into the intake runners. Fuel for thought, and something else to hang on the wall of shame. LOL