Just yesterday I found gas dripping out of the bottom of the charcoal canister. The main and return gas lines are hooked up correctly. Also I did not have too much gas in the tank. I changed the pump about 3 years ago (Walbro 342 pump). I know the line running to the canister is for gas vapor. Is there a in-line valve that only allows gas vapor up to the canister that failed? If so where is it located? GM part number? If not, how do I fix this problem? Thanks.
I've seen this happen on two other cars now, and the problem both times was a loose top clamp on the hose that connects the pump outlet to the hanger. It allowed fuel to be sprayed up onto the vapor tube.
Dean
Dean,
From the factory did GM have an in-line “vapor” valve? Maybe attached to the hanger itself or somewhere in-line? If not do you know of a valve that would work for this application to eliminate possible future problems. Thanks.
Talk about coincidence. That happened to me Saturday after I got the oil change for the long Winter's nap. By the time I got back to the garage, it had stopped. Took it back to storage and it was o.k. Now I know where to look next Spring when I wake it up again.
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Not stopping, fueling, when the nozzle first clicks off, is the most frequent cause. Second is the little vent solenoid failing to work.
Which allows fuel fumes to just gather until they saturate the charcoal in the canister.
Bruce
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That is a weird one, double check your regulator vacuum hose to see if it has fuel also, could be a leak or rupture there.
Mike Nelson
Does anyone have a hook-up with a GM dealer? I need an 87 GN fuel pump sending unit. I checked with my local GM supplier…$248.00. Then I checked with Pep Boys type stores and this part can only be bought thru dealers.
Wally,
Get one from a salvage yard for $20, tank and all. After testing the sending unit and cleaning the inside thoroughly, install a bigger pump, new sock, and paint the outside with POR and flat black paint. Then just swap tanks when you're ready.Don't forget the hot wire.
There are thousands of Regals in the yards everywhere in the country. I'll bet 99% of the sending units are still good.
I'm using a Buick Ultra fuel pump (Supercharged) with Blue Tops and have never leaned out for lack of fuel.
Donald,
I just need the sending unit (pump carriage). I already have a new tank, bigger pump and hotwire kit. If you could get and test a sending unit for me that would be great. Let me know how you want to work it. Thanks.
Try GMPartsDirect.Com
Testing a sending unit is easy. 90 ohms full and 0 ohms empty
Don how did you mount the fuel pump to a carb Regal sending unit? Also does the absence of the fuel baffle in a carb Regal tank cause any problems?
That's what I was wondering. When I needed a new sending unit I figured I could just use the setup out of a regular regal I had but they were different. The tanks for the TR's have baffles in them to help keep the gas around the pickup, mine were plastic baffles, I believe the new tanks being made have metal baffles. Also the actual hangar part was different too but I can't remember how offhand. Maybe only two lines instead of three? I ended up buying a new one from GM, somewhere between $150-200, but I didn't know of any other options. For future reference it would be nice to know if it's possible to use a regular Regal sending unit, anyone?
After having a sidebar with Phil, I realized I must have made a mistake. I assumed the sending units were the same between the carb and the turbo Regals. I didn't do what I thought you could. I rebuilt my own tank. My apologies for passing bad information.
Dean,
Thanks for the 411. When I dropped the tank it appeared the hose from the pump to the hanger did come loose. Also when this problem occurred the fuel system would not hold “initial” pressure. Thanks again.
No Prob. BTW, I pulled my tank to do some stuff to the car, and when we hooked up my pump/hanger assembly to do some flow testing, guess what? yep, top clamp was leaking. Not much, but enough to make us all say, "Sheesh!"
That pump was put in the day that this phenomena occured to the first car I had seen this happen to, so we made sure that the clamps on mine were good'n'tight, but sure enough...
Dean