This one has me scratching my head....

A few weeks ago, I went out to start up my GTX .. it had been sitting about a month or two. Unfortunately, it's got the same B-Body gas gauge problem I've seen a few others have here -- anything less than a 1/4 tank and the reading goes down to below empty. I was pretty sure I still had around 3 gallons in there.

So, I start cranking. And cranking. Off and on for about 5 minutes. Nothing. I look down the carb - dry as a bone. Nothing's getting up there. So, I check the tank the only way I know how -- I took off the cap and rocked the back of the car and I could hear gas swishing around in there. So, I tried again - still nothing getting to the carb.

I suspected it was the fuel pump by now and should have checked the lines at that point to see if anything was getting that far up, but instead added about 3 gallons of fresh gas to my tank that I had with me.

A few cranks later it fires up and has continued to fire up the dozen or so times since then I've started it....

Any ideas? Could it have been that even with "some" gas in the tank -- not sure how much- it wasn't enough to get picked up? Or am I missing something obvious?

Thanks for any tips.

Sounds like you found your problem. Fuel can go below pickup.

Try to picture the size and shape of your gas tank. Now picture the the pickup. You have to put a in lot of gas just to cover the pickup esp if the car is leaning away from the pickup. My guess is you have the pickup partially uncovered and you were sucking air.

Thanks very much for the info. This seems to confirm my suspicion..

On the Pickup issue.. whereabouts is that on a B-Body tank? I can't recall ever seeing the part off a car, so not sure how to picture this scenario completely.

Thanks again.

If you notice the tank is long and wide. You may want to remove your sending unit and bend it a little it may and may not help a little on the reading.

Hey, thanks a lot for the help and the pics! This board is the best!!