Messages

76

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 09 2013, 11:02:04 PM »

wired direct as you had it eliminates any fuses or relays...almos t sounds like the polarity is reversed...pum p running backward and nothing coming out....but, unless the first one was bad and this one is reversed on the polarity markings, that ain't it

I thought about the reverse polarity as well, but there's only one way to plug the pump in with the supplied wire. 


I sucked out most of the fuel and dropped the tank enough to disconnect the feed, vent, and return lines.  Between smelling the fumes, and being late at night, I'm starting to argue with myself...and losing the arguments.  LOL..  I'll pull the guts out in the morning and take a look.

77

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 09 2013, 08:38:41 PM »

Are you sure the fuse under the dash is still ok.

I checked every fuse in the block multiple times, and they are all good.


Just picked up one of those hand pump thingies from the auto parts store, gonna try to get some of this fuel out before I drop it again.  Wife's getting tired of me coming in smelling of gas.

78

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 09 2013, 03:31:13 PM »

I already tried the stock wiring and the jump from the test lead.  The pump sounds like it runs, but no fuel is pumped.
 
Now I have 10 gallons of fuel in the tank, and no way to pump it out before I drop the tank again and try to figure this out again.
Hey SuperSix... I'm getting tired of this Shit.

79

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 09 2013, 12:54:32 PM »

disconnect the rubber hose that goes from the tank steel  tubing to the steel fuel line that goes to the front of the car

jump the pump and see if fuel spurts out as it should if the pump is working

No fuel.

80

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 09 2013, 10:33:38 AM »

Here we go again...
 
Update:  I replaced the dead pump with a new one, and also installed the intermediate wiring harness... voltage to the new pump made it sound like a healthy pump should. 
Installed averything in the car, put another 5 gallons of fuel in the tank, turn the key and no start...  The pump runs when I first turn the key on then stops like it should.
I disconnected the hotwire and tried it with the factory wiring, and still no start.
I do not have fuel pressure at the rail.
I plugged my jumper wire from the fuel pump test lead to the hot stud on the alternator and the fuel pump will run, but no fuel to the rail.
Checked all the pertinent fuses and nothing cooked.
WTF   
 
Willing to pay a reasonable rate for someone to come to Harrisburg, PA and diagnose the problem! No kidding.

81

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 05 2013, 07:10:51 AM »

 

(And you can say "shit" whenever you want to here )



Thanks for all the help guys, diagnosing this shit is a pain without the experience of those on here.

82

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 04 2013, 10:04:28 PM »

Update:
 
I put the Walbro pump on the bench and hit it with 12 volts.  It made a sick sounding humming noise.  I then hit the two points that Steve mentioned and it made a similiar humm noise.
 
I then hit the stock pump with 12 volts and it sounded like it was ready to take off.  Sounded like a normal pump should.
 
Looks like the Walbro died a premature death, then caused the fuse in the Hotwire harness to blow.
 
Looking on the bright side of things, at least it $hit the bed in my driveway 

83

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 04 2013, 04:12:17 PM »

just for the heck of it...look at the top of your pump.  Next to the connectors, there should be a couple of metal contacts.  I think they are test points or maybe just the attachment rivets for the terminals.  touch power and ground wires to those points next to the appropriate +/- terminals.  See if the pump then works
 

Steve... Do you recommend I replace the in tank wiring?  This Walbro came with the wire that plugs into the pump and goes to the hangar.

I would....these harnesses are really old and the ground side has always been weak

Racetronix sells an hd harnesses that replaces the bulkhead connector in the sending unit and runs the ground wire all the way to the connector so you have a direct ground path.  Be sure you tug gently on the wires to make sure they were well crimped in the bulkhead connector

I just ordered the one you described. 
I'll test the pump as you described and report back later tonight.

84

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 04 2013, 01:05:42 PM »

Steve... Do you recommend I replace the in tank wiring?  This Walbro came with the wire that plugs into the pump and goes to the hangar.

85

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 03 2013, 10:27:46 PM »

The Hotwire harness is not pinched, nor is the lead from the relay to the tank.


I pulled out the pump and the short hose from the pump to the hangar was on.


    Nuthin' is ever easy...


Now what?

86

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 03 2013, 08:40:16 PM »

If I confirm that the hotwire harness is not pinched or compromised, I'm going to drop the tank and remove the pump to make sure the hose did not blow off.
 
Would that cause the fuse to blow on the hotwire harness?
 
Any chance the factory relay went bad?

87

General Buick Tech / Re: Walbro 255 Install/Car Shut Off

« on: September 03 2013, 04:22:58 PM »

This is what I have done so far...
 
I unplugged the hotwire and ran 12 volts to the pump via the factory plug.  The pump makes a humming noise, but I don't get any pressure at the rail.
 
I bought the pump and Hotwire kit from Turbo Tweak.  The Hotwire kit and pump came with Racetronix labeling..
 
After I replaced the hotwire fuse, it did not blow again, but then again the car would not start either..
 
I'll get under the car and check to make sure nothing pinched the Hotwire from the front to rear, then I guess I'll drop the tank?

88

General Buick Tech / Walbro 255 Install/Car Shut Off

« on: September 03 2013, 01:10:40 PM »

I ordered a Walbro 255, and Hotwire kit from TT, and installed it on my '87 GN over the weekend.  Installation went smooth, as I took my time, and I'm pretty anal...
I started the car this morning and it fired right up, fuel pressure went right up to 44lbs at the rail, and stayed there.  I check for leaks as I also replaced the fuel filter.  All was well, so I ventured out on the maiden voyage.  Car ran like a scalded dog as it always has.  I got a few miles from the house and realized I forgot my wallet.  Always nice to have when you get pulled over  
I shut it off in the driveway, got my wallet and came back out to the car.  Opened the hood to check fuel pressure again when I started the car.  Car fired up, then I noticed the gauge drop as the car started to stumble.  Fuel pressure dropped to 20lbs as the car shut off.  The first thing I did was check the 20 amp mini fuse that is on the Hotwire harness that mounts to the rear of the alternator.  Fuse was blown.  I replaced the fuse with another 20 amp, and the car still would not start.
I checked the FP and injector fuse on the fuseblock, and they were fine.  Ended up pushing the car into the garage and now I'm begging for help....