My fuel pump fuse (10 amp) is blowing on my '86 Fiero, 2.8, 5-speed. The original pump was replaced a couple of years ago with a new Walbro unit. Recently, I've been playing around with the auxillary gauges, replacing them with Autometer (I don't see a connection to my fuse problem.)
I ran into town this morning and as I was pulling back into my driveway, the engine died.,

Any ideas? Thanks.

If the wires on the oil pressure sender get grounded, that would do it.

I had a wire chafing on a heat shield on the firewall side. It took a month or so to chase it down, as I'd replace the fuse and all worked for a while. I had replaced the fuel pump twice thinking that was the problem.

I'm going to second the oil sending unit switch. I have had this give trouble a couple of times.

HUH! This is interesting as I just replaced the fuel pump in the '88 T-Top (the one I haven't been able to sell). It was running great: let it idle for about 1/2 hour while checking things out, drove it around the driveway 4 times (to circulate fluids & scrub the surface rust off the brake rotors) - and it just died. Now it's blowing the fuses (didn't do that before).
If the oil press. sending unit goes bad, can that cause the blown fuses? I really don't want to spend any more time or money on this thing, I just hate to see a good running car not run because of a simple fix. (even though I have no plans for it & nobody seems to want a completely rust-free '88 T-Top to build....)

Edit: Wow Rick you got lucky it quit in your driveway!
How's everything going? Drop by sometime.

[This message has been edited by Tha Driver (edited 10-22-2008).]

Problem Solved.... There was a short in the fuel pump relay socket. I had recently squeezed a large bag in the trunk and it must have jiggled the wires going to the bottom of the relay socket. Together with a good bump in the road the short was created. I found the short with my "Short-Finder" device I got from Harbor Freight. Then I readjusted the wires and insulated them from each other with silicone rubber.

Rick

How freakin big of a bag could you fit in the trunk that would hit the relay hidden under a louver and behind the air filter!!

Thatsa big bag.

What I am I missing there?

quote Originally posted by Old Lar: I had a wire chafing on a heat shield on the firewall side. It took a month or so to chase it down, as I'd replace the fuse and all worked for a while. I had replaced the fuel pump twice thinking that was the problem.

I had the exact same thing Old Lar, hunted it down after replacing the fuel pump too.


Hey I too am puzzled how you got near the relay with a bag in the trunk?

I fixed mine too. I checked all the wiring, wiggling them around in the process, replaced the fuse, & it started. So now it's a good running & driving T-Top again that I don't need...

quote Originally posted by 86GT3.4DOHC: How freakin big of a bag could you fit in the trunk that would hit the relay hidden under a louver and behind the air filter!! Thatsa big bag. What I am I missing there?

x2, I am completely lost

quote Originally posted by Tha Driver: If the oil press. sending unit goes bad, can that cause the blown fuses?

I can't say for sure. BUT, if you think the oil pressure sender is your problem, dis-connect the wires (i think there are 3) from the sender, insulate each of the ends and secure them, then replace your fuse and see if it blows. You guage won't work during this test, but it should help to isolate the problem.

quote Originally posted by Tha Driver: Wow Rick you got lucky it quit in your driveway !

You think he was lucky (!?) - when mine quit I was in a McDonald's parking lot and had enough spare change for a coffee and fries

[This message has been edited by PaulJK (edited 10-23-2008).]

I had a large tennis bag (6 rackets,) plus my battery has been moved up front and there is an Alphasonic amplifier. I should have put the bag in the back storage.