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93zuzu89
 Post subject: engine trouble..again
New postPosted: Tue Jul 08, 2008 11:04 pm 
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1993 Isuzu Pick Up
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Joined: Sun Nov 18, 2007 10:58 am
Posts: 139
Location: Dearing, GA
 
i've recently been having a problem with my truck getting enough fuel to the carb. at first i was thinkin maybe i had a bad carb, and plus i seen a weber one on ebay for cheaper than i could get a stock replacement so i opted to buy it. i had a guy that my dad knows put it on and then it wouldn't crank because fuel wasnt getting to the new carb. so the guy went out and bought an electrical fuel pump (and carbed isuzus have mech. fuel pumps). funny thing is when he rigged up the electrical one, all he did was route it to the old mech. pump and it ran great for 100 miles or so then it started to really get bad, where no gas was getting to the carb again. for one thing i've never heard of running two fuel pumps on anything. i guess what i was wondering was if anyone thinks the old pump may be bad? and if so could i just run the fuel line from the elec. pump to the carb?

thanks.
Deric


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isuzuEH
 Post subject:
New postPosted: Wed Jul 09, 2008 7:11 pm 
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1989 Isuzu Pick Up
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Joined: Tue Dec 26, 2006 1:46 am
Posts: 414
Location: Ontario, Canada
 
hey man just throwing this out there possibly could you have alot of crap in the bottom of your gas tank and when you let it run to empty your sucking it all up
1989 isuzu space cab - bagged / shaved/ dragged
1999 chevy s-10 - bagged / flamed / boomed
1994 jeep grand cherokee - daily drive


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93zuzu89
 Post subject:
New postPosted: Fri Jul 11, 2008 7:17 pm 
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1993 Isuzu Pick Up
Status Points Earned
1490

Joined: Sun Nov 18, 2007 10:58 am
Posts: 139
Location: Dearing, GA
 
true man. but i mean, has anyone heard of running two fuel pumps? i haven't heard of doing that and i think the guy jus did it to get it done quick.

also, when you convert to a weber carb, what do you do with the stock electrical carb connections?
Deric


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lowzone1
 Post subject:
New postPosted: Sat Jul 12, 2008 12:58 am 
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Joined: Mon Aug 27, 2007 5:02 pm
Posts: 156
Location: earth...sometimes NJ
 
93zuzu89 wrote:
has anyone heard of running two fuel pumps? i haven't heard of doing that and i think the guy jus did it to get it done quick.

the diaphrams on the OEM fuel pumps use to tear and not pump anything but oil out the drain tube that runs down the passengerside of the motor. you can run the fuel thru 2 pumps....since blocking off the OEM fuel pump, you have to pull the valve cover and remove the clip holding the pushrod inplace and its TIGHT.....what they should have done was run the main feed to the carb....but the return line, i wouldnt know what to do with.....


93zuzu89 wrote:
also, when you convert to a weber carb, what do you do with the stock electrical carb connections?



leave it hanging...you just need to hook up 12 volts to the choke thats powered by the ignition....otherwise the choke would just be on all the time....poor cold starts,dead battery and burned up choke motor....in due time.....ignition switched 12v to choke.....thats it...oh and pull the CEL bulb...cause thats going to glow immediately :)
technically the ECM could be removed too


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93zuzu89
 Post subject:
New postPosted: Sun Jul 27, 2008 11:37 am 
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1993 Isuzu Pick Up
Status Points Earned
1490

Joined: Sun Nov 18, 2007 10:58 am
Posts: 139
Location: Dearing, GA
 
ok i believe i have it wired up finally. i've taken it to a couple of places and its finally running good. the thing is, i have poor cold starts. it almost stalls every time i first crank the truck up. other than that, once its cranked it'll run great.

also, i was driving the other day and it didn't get fuel to the engine and cut off on me like before but hasn't done it since then, kinda scared me cuz i just spent $300 to get that fixed and it seemed like it was doing it again. idk, thought i'd throw that in there too. thanks guys.
Deric


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low1994
 Post subject:
New postPosted: Fri Aug 01, 2008 7:31 am 
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1994 Isuzu Pick Up
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660

Joined: Mon Dec 03, 2007 2:09 pm
Posts: 56
Location: rochester, NY
 
the wonders of the carb'd pup....i feel the pain man...haha my 94' is carb'd have had many of the identical problems.


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