OK. After installing the BOSCH pump(using the old ones instructions) ... We(Canuk_SiR and myself) go to fire the car up. NOTHING. It wont even prime. Were like wtf. We proceed to go through everything and check it up. We checked it all.And nothing was wrong. We even changed the wires. (going to the pump) So we go to check everything with the volt meter. Power wire= 12V. No problem. 12V works from grounding on the chasis or using the ground wire from the stock wiring. This is where its gets retarded.
As soon as the power wire touches the + on the pump it DROPS the voltage to 6 V.(at the pump) what the hell?????
How does it do that?
We made sure the wires were properly done a million times and got the same result. WHen wired up the + side(on the pump) would read 6V. How it would drop like that made no sense to us(as we arent exactly electrical engineers) .
The pump would move a bit when power was applied but thats it. just sort of jump a little bit.
SO, am I missing something with the wiring or is the pump FUCKED??
*Sigh*
nothing like spending almost the whole day for nothing (i should get a walboro... but I want to find out whats wrong here)


Modified by SiRkid at 12:31 AM 4/13/2003

 

Are you sure the Bosch is a 12V pump?

 

i'm no electrician, but i think voltage goes down as current goes up given the same resistence, so if it dropped to 6V from 12, check the current draw. the pump may be shorted or stalled. maybe a brush is hung up or something.. hope you kept the receipt....

 

yes the bosch is 12v.
and supposedly it uses lesss current than the stock pump

http://www.theoldone.com/articles/fuelpump/

so you think its fuxored?

common folks. Anyone have any idea?


Modified by SiRkid at 6:09 PM 4/13/2003

 

Make sure the inlet of the pump isnt bottoming on the bottom of the tank.
Raise the pump out the tank a little bit and try to see if it primes?
Make sure there is always fuel goin through the pump though, dont run it dry.
You probably Know that though.

 

ok, its mounted outside the tank.. (like in the link above)
. that would still not explain the voltage drop. unless it only needs 6 volts(as it uses less)
hmm.

 

is it an in tank pump? if so it will not work outside the tank. those pumps can push fluid really well, but they can't really pull it.

 

oh for the love a pete.
if your going to respond and dont knwo about the pump.
look at the install!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!
anyone help me out please?

 

wow. i wasn't trying to be condescending at all. do you honestly think that no one has ever tried to use an intank pump as an inline pump before? god forbid bosch would ever make an intank pump.. sometimes it's really obvious ****. i was pointing it out. y'all need to chill the **** out. a simple yes or no would have sufficed. good luck with your problems.

 

sorry dude. just a little frustrated

 

eh, i got a little carried away too. sorry about that..

the reason i said to check the current draw in my first post is because when something shorts out, the voltage may drop, but the current goes way up (less resistence to ground). i remember dealing with fucked motors when i raced R/C cars and those sound like the symptoms exactly of a motor that's toast. moves a little when you apply power but that's it. (usually ours started smoking too, 50+amps will do that). sounds like you might be in the market for the walbro...

 

I think so too

 

get your money back and get a walbro.

http://cgi.ebay.com/ebaymotors...=6764



that install pissed me off to much

 

ditto.
but I want a noisy pump

 

ok, finally got a response from LARRY(yeah some of you might not like him but I think he has the most experience with this pump here)

"If you run water through a Bosch, or any other fuel pump, you'll fry the insides. Gasoline doesn't conduct electricity, but water does, and the pump will run for an instant, make a zzzzz and that's the end of the road for it....ruined pump. I know because I didn't "think" and tried the same test many moons ago.
If you don't want electric pumps to screw up, you MUST have a filter on them to prevent any debris from entering them."

pump= t3h fuXored!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid &raquo;</TD></TR><TR><TD CLASS="quote">ok, finally got a response from LARRY(yeah some of you might not like him but I think he has the most experience with this pump here)

"If you run water through a Bosch, or any other fuel pump, you'll fry the insides. Gasoline doesn't conduct electricity, but water does, and the pump will run for an instant, make a zzzzz and that's the end of the road for it....ruined pump. I know because I didn't "think" and tried the same test many moons ago.
If you don't want electric pumps to screw up, you MUST have a filter on them to prevent any debris from entering them."

pump= t3h fuXored! </TD></TR></TABLE>

 

yeah.
hopefully I can get my money back just fine.
Thanks for recommending the boards!

 

No problem dude

 

just so you lnow ahead of time... I ran the exact setup (endyn pump mounted outside the tank as my only pump) and it was verry loud...

outside of the car you could hear an electronic buzz louder than my exhaust, and inside the car it was worse... I had it mounted directly against the chasis and it resonated throughout the car.. maybee if it were insulated it woul dbe better...

 

Bosch pumps are good pumps and I am sure Larry will make good on it if its defective. There is always Aeromotive too.. both are good though.