[muppetz3]

Ok, i keep blowing my EFI fuse. It blew yesterday, so i replaced it. Made it to school and half way home then it went again. So i put another one in, tryed to start it and it blew again. Did not even get it started. Something is shorting bad, any idea what?

Nick

 

[rockota]

HAHAHAHA! How timely! I just got mine fixed! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">

Get ready for some fun tracking down the short. I went through the ENTIRE wiring harness looking for mine. Turned out to be the spot where the + wire for the fuel pump passes through the pump holder into the tank... The protective plastic coating had worn off and allowed it to short against the tank. Cost me $127 for the new fuel pump holder, $4 for the two rolls of electrical tape I went through putting the harness back together, $?? for the upper plenum gasket that I needed after pulling the intake to get the wiring harness out... About $15 in 15 amp fuses that I burned while "testing"...
and about 20-25 hours tracking the damn problem down.

Good luck... Hope it goes easier for you.
bkg

 

[muppetz3]

<IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0">

Nick

 

[rockota]

Originally posted by muppetz3:
<STRONG> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0"> <IMG SRC="smilies/pissed.gif" border="0">

</STRONG>

Sorry! Don't blame ya, it sucked. The quick things to check are:
EFI Relay.
Short by the O2 sensor.
Rusty/short for + wire on fuel pump.

Turn the key to "on" and short the fuel pump connectors on the diag block next to the fuse block under the hood. I think it's like f and b+ or somethign like that. If you blow the fuse jumping that (turning the fuel pump on), I'd start by pulling the pump out of the tank.

Then, if the holder is all rusty and old, use a wire to by-pass the + wire from the connector to the pump and try the above test again. If everything is good, it's probably the pump holder. If it's still bad, it could be anything from a short somewhere else to a bad fuel pump (doubt it's the fuel pump though)...

HTH.
bkg

 

[Sir Flipsalot]

Originally posted by muppetz3:
<STRONG>Ok, i keep blowing my EFI fuse. It blew yesterday, so i replaced it. Made it to school and half way home then it went again. So i put another one in, tryed to start it and it blew again. Did not even get it started. Something is shorting bad, any idea what?

Nick</STRONG>

I would have to agree with Rockota... When my car was blowing the EFI fuse (Toyota Supra) it ended up being the exact same thing as Rockota's. The isolator where the + wire to the fuel pump goes through the fuel pumps mounting bracket was shorting out to ground.... That is the FIRST place you should look.... Don't do like me and take the entire car apart looking for the short because 9/10 it is the fuel pump wire!!!

 

[muppetz3]

agh, well i pulled the silver round relay. Not sure what it is, and when i put the fuse in it did not blow. So i tryed cranking it, still good. I walk over and put the relay back in and <IMG SRC="smilies/nuke.gif" border="0"> it blew. The relay also clicked. Is this normail?

Nick

 

[rockota]

relay should click.. this is normal. I'd bet $$ that it's the fuel pump holder...

 

[muppetz3]

and the quickest way to get to the holder is? Its a new sending unit =( well some what new, like 2 years old.

Nick

 

[rockota]

Originally posted by muppetz3:
<STRONG>and the quickest way to get to the holder is? Its a new sending unit =( well some what new, like 2 years old.
</STRONG>

Quickest way to the holder is to drop the tank... Unless it's a 4Runner, then there is an access panel under the rear seat...

Not fun. Good luck!

 

[muppetz3]

Well i can see the wires on the top with no problem. The bod lift helps a lot =) And they look good from what i could see. They were a bit covered in dirt, but did not see any wires touching anything. agh.

Nick