GAHHH! ECMB fuse keeps blowing

[BadForm]

Okay... I just got the truck back, with the walbro installed. :smile:

However, there's a definate problem now. Before I got it back, they told me that it started right up and ran for like 5 -10 minutes and then shut itself off. Hmmm...

Anyway, eventually, ecmb fuse is found to be dead and they replace it.

So I take the truck out, put some gas in, and drive off. Get it washed at the local self serv (about 10- 15 minutes of it idling), and head for home.

I build some boost to merge into traffic and all of a sudden I'm coasting. And it won't start. Fortunately I was only a block from home, so I pulled over, ran home and swapped fuses, and it started up again.

I think the injectors are fine.
I think it's not the EGR. At least it wasn't a problem before.
Maybe it's the boost solenoid, but since it's really hard to build boost when idling, I don't think that's it either.

But I don't understand what the fuel pump couild do to cause it to pop the fuse after it's been running for a while. And the second time happened right as I hit like 7 lbs of boost.

I also smell gas when standing by the driver's door, but not underhood, or at the gastank.

I haven't had my trucklet for a week, but I don't want to drive it until I fix this.

Any ideas, gang?

 

[Tooky]

LOL, I love the term "trucklet"!

The fix is simple, instead of the stock 10A fuse with ECMB, when going to the Walbro most people require a 15A fuse substitute. I was lucky and I did not blow the original 10A fuse after my Walbro installation, but I keep a 15A or two in the glovebox for safekeeping anyways.

I can't comment on anything else, especially the leaky gas, that sounds potentially dangerous.

 

[JoeLutz]

I believe that the ECMB fuse powers the injectors and the control coil in the fuel pump relay as well as part of the ecm.

 

[BadForm]

thanks guys!
I put in the 15 amp fuse and I haven't had any trouble yet. Good call! :smile:

As for the gas smell, I can still smell it, kind of. I'll see if I can smell it tomorrow morning. It might just be spilled gas from checking the pressure (by spraying from the schrader valve... GRRR!).

I would have done this myself, but I was recently out of work for a week because I was sick, and I really didn't want to catch cold again. All in all though, $150 to change the pump wasn't a bad deal at all.

Thanks again!