Topic: It's alive!!! but, it has a slight problem.

[Zoomschwortz]

Fired up the new engine and after the test drive, it is sweet, way more power than the last engine.

Two problems though.

First, the new electric fan blew it's fuse. I have double checked the few wires and they are all in the correct place. One thing that may be the problem is, the fan draws 18 amps, but, I believe that would be when it is running and not at startup. It has a 20 amp fuse, that blew when the fan tried to start. The fan started winding up and then the fuse blew. I think I might try a 25 amp fuse or see if I can find a slow blow 20 amp fuse.

The second problem is the one that has me concerned.

When I fired up the engine, it ran for about 10 seconds and died. I tried it a few more times, but it kept doing the same thing. It acted like it was running out of fuel so I jumper-ed the fuel pump at the diagnostic port and fired up the engine again. This time it kept running, so after 10 or 15 minutes, I pull the jumper and the engine died in about 10 seconds.

For some reason it doesn't run without being jumper-ed.

Any ideas?

Thanks
Ken

[79coyotefrg]

  see if you can find a 20amp relay,  might save you some time  but i think a 25 amp  would be fine

um  on the jumper 

[86bobbedtoy]

I have no clue on the fuel but I will do some resurch,  What did u do?  engine wise.

[Zoomschwortz [OP]]

I have no clue on the fuel but I will do some resurch,  What did u do?  engine wise.

It's a .040" overbore 22RE with ported EB RV head and large Ferrea valves, large TB, Large air intake, LC header and cam.

I added a 25 amp fuse to the fan and it blew too. I had all of my fan stuff laid out for the install yesterday and my wife moved everything and the fuse came up missing, so I don't really know what size it came with. I wired it direct when had the engine running for the first time and it didn't come on when the temp started rising. It really moves a lot of air and drops the temp pretty fast.

I did find a 40 amp fuse setting on my electrical fitting box tonight. I don't remember ever seeing it before and it is the only 40 amp fuse I have. I wonder if it could be the fuse that came with the fan? I sure don't want to cook the new fan.

Take care.
Ken

[highridin4x4]

Do you have your intake tube hooked up between your airfilter housing and your throttle body?
If it is off your mass air flow sensor wont read the air going in to the motor.

Scott

[Zoomschwortz [OP]]

Do you have your intake tube hooked up between your airfilter housing and your throttle body?
If it is off your mass air flow sensor wont read the air going in to the motor.

Scott

Yes I do. It is a brand new large tube after market number.

I am wondering about the airflow meter though.

[Prismo]

You need the AFM to be able to read airflow or it will never run right.

[Zoomschwortz [OP]]

You need the AFM to be able to read airflow or it will never run right.

I have the AFM connected. I am wondering if it is working correctly though.

It appears that the AFM and the ECU can turn the fuel pump on and if one of them isn't working correctly, the pump doesn't turn on. There is also a Circuit opening relay between the ECU, AFM and the fuel pump, but I'm not sure where it is located on the truck. If it is bad then the ECU or AFM couldn't turn on the fuel pump. I believe that the Circuit opening relay and ECU are working because without the jumper, I can turn the ign. on and the pump will charge the fuel system so the engine will start. Once the engine starts, the AFM needs to be working or the pump will not continue to run.

The fuel pump works, because the truck runs when I manually turn it on with a jumper.

[Zoomschwortz [OP]]

I installed a new AFM and now the fuel pump works and it runs, BUT, it kicked out a code 31, so it looks like I may have bought a bad AFM that is shorted out on the sweeper.

They will have a new one Tuesday afternoon

If anyone has any other ideas of what could be causing a code 31, I'd like to hear them.

Thanks
Ken