NorCalDoug
problems solved daily...
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- #101
Brentbba said:
As a one-time Lexus CPO-vehicle I suspect my rig would expect nothing less than what she once received from Lexus...including her bath
EFI Fuse Blowing -- Ideas? (1 Viewer)
- Thread starter NorCalDoug
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As a one-time Lexus CPO-vehicle I suspect my rig would expect nothing less than what she once received from Lexus...including her bath
Toyota of Escondido will wash MyBrentbba said:
She will be going in for a smog check soon 
Doug, why do you need a bracket for a wiring issue? Is there some sort of insulation missing or worn through?
Doug, Glad you have some answers - call me if you need anything at all - I am 4hrs from LV...
BTW I send you a care package it might ease the pain a bit
BTW I send you a care package it might ease the pain a bit
alia176
SILVER Star
Pump drawing high amps - perhaps there's a hole in the strainer sock, a piece of debris went inside and now the pump rotor is lodged? A locked motor would draw high amps on startup and eventually blow fuses and stuff.
Doug - I don't think that wire is necessarily the cause of your problems. That whole assembly is submerged as Dan noted, including the terminals on the pump, and are not sealed against coming in contact with petrol. So I'm a bit confused how having a bit of bare wire would completely short out the EFI fuse. I had all of that apart when I swapped in the Supra fuel pump and the Supra fuel pump just has threaded posts that receive the wires so it is even more exposed to fuel and I didn't blow up when I started the truck.
I'm with Alia176 that something else is going on to draw that many amps.
Good luck with getting it back home though, this sounds like it has been a tough time of things and has lasted too long. For crying out loud, I've already increased my family size in less time
I'm with Alia176 that something else is going on to draw that many amps.
Good luck with getting it back home though, this sounds like it has been a tough time of things and has lasted too long. For crying out loud, I've already increased my family size in less time
clownmidget said:
I'm assuming the bare wire shorted out against the bracket which would cause a high amperage load which would then cause the fuse to blow. That's the only thing that makes sense. I = V/R. A direct short will cause I to be very large since R is very small.
I guess somehow the sheathing on the wire became worn.
IdahoDoug said:
MythBusters on the Discover channel tried this myth out. It was more or less confirmed, however without a barrel the bullet just acted like schrapnel (which isn't a good thing).
I'm not sure if Doug had mentioned all the water we found in his wiring connectors behind the DS kick panel. This area was damp and the connectors had water leaking from them. This could have possibly been the short that eventually lead to the fuel pump wire overheating.
Darwood said:
if you have a cartridge fire without a barrel, the brass casing will be the part flying off (assuming as is normally the case that it is lighter than the bullet)...
(and anyway, bullets don't explode and make shrapnel) sorry....
BUSTED!
(Maybe if the casing was supported in the back somehow, perhaps....)
(and still nothing about this DV trip in the Trails section... what's with that...?
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I also don't get the wire shorting thing. That's pretty stout insulation, and the pipe/bracket it's next to isn't sharp. Wonder if someone's been in there before and nicked it or cut it getting it in and out of the fuel tank. I recall some edges there when I changed my pump's fuel strainer a couple years ago. Having said that, I'd replace the entire pump as a precaution. Not sure how that wire would get hot enough to blacken the insulation without hitting the fuel vapor's flash point. I'd want to see the wire underneath the insulation. Makes me wonder if the guys working on your truck scraped the pump getting it out, then tested it out of the tank and it shorted against the pipe/bracket. Color me Mr. Paranoid.
DougM
DougM
e9999 said:actually, if you have a cartridge fire without a barrel, the brass casing will be the part flying off (assuming as is normally the case that it is lighter than the bullet)...
(and anyway, bullets don't explode and make shrapnel) sorry....
Actually both the casing and the bullet will fly off. Newton's 3rd law says so however the casing will fly further than the bullet due to mass. Also I didn't say it created shrapnel, just that it was like shrapnel since you get flying metal when the cartridge separates.
Looking at it again, I wonder if the wire was pinched between the bracket and the fuel pipe where obviously vibration will eventually wear through the insulation? To me, they moved the wire as it has a definite kink to it, so that's a working theory. That would be improper assembly or someone in the tank as I surmised.
DougM
DougM
alia176 said:
Can you say "sock" in tech?...........
IdahoDoug said:
I agree, however I don't think we can assume that the blackening in the picture is due to heat. The picture quality isn't that great, it could be from the mechanics’ greasy fingers for all we know. Also why would it get hot there, I'm guessing that the wire that feeds that connection is probably of less gauge and should have given out first.
Not that this relates to Doug's problems, but I was successful in discharging a .22 rimfire in a barn door hinge using a tack hammer in my youth. It killed a yound boar directly and the casing did indeed "fire" backwards out of the hinge but didn't do anymore than assist us in ruining some good underwear...
