WTF is this? - F-Body Road Racing and Autocross Forums

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My car developed a fuel-starve issue at an autocross about a month ago. It had never done it before, but even with a full tank, it would fuel starve coming out of hard turns. On the street, in a straight line, nothing.

I took it to a shop that's really familiar with F-Bodies (although maybe not a lot of thirdgens pass through), and they dropped the tank and found this inside the tank. Basically one hose was going from this widget to the fuel pump, and another hose was coming out the other end. It wasn't secure in the tank, and they suspect that it would flop around interrupting the flow of fuel. They have no idea what it is, so they replaced the hose/widget/hose combination with just a single hose. I just picked the car up yesterday so I haven't autocrossed it to see if it's fixed.

The car was originally carb'ed but has a later TPI L98 in it now. Although it has an extensive autocross history, I'm not sure how much bastardization has gone on with it over the years. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif)

Pat

patred View Member Profile	May 5 2011, 11:45 PM Post #1
Zero brand loyalty Group: Advanced Members Posts: 645 Joined: 22-January 04 From: Merryland Member No.: 145	(IMG:http://farm6.static.flickr.com/5267/5691313193_82c9deeacf.jpg) (IMG:http://farm6.static.flickr.com/5149/5691885860_c4e42e4dee.jpg) My car developed a fuel-starve issue at an autocross about a month ago. It had never done it before, but even with a full tank, it would fuel starve coming out of hard turns. On the street, in a straight line, nothing. I took it to a shop that's really familiar with F-Bodies (although maybe not a lot of thirdgens pass through), and they dropped the tank and found this inside the tank. Basically one hose was going from this widget to the fuel pump, and another hose was coming out the other end. It wasn't secure in the tank, and they suspect that it would flop around interrupting the flow of fuel. They have no idea what it is, so they replaced the hose/widget/hose combination with just a single hose. I just picked the car up yesterday so I haven't autocrossed it to see if it's fixed. The car was originally carb'ed but has a later TPI L98 in it now. Although it has an extensive autocross history, I'm not sure how much bastardization has gone on with it over the years. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) Pat

wrencher View Member Profile	May 17 2011, 05:10 AM Post #2
Member Group: Advanced Members Posts: 136 Joined: 4-September 10 From: Chicagoland Member No.: 20,108	It's also known as a pulsator. I know not my name for it. It dampens the pulsations of the pump in the supply line. Also helps isolate the pumps vibrations from the sending unit to curb noise. I'm up here in Chicagoland area, we have some really crappy fuel. Likely worst & some of the most expensive in the country. So lots of fuel system related failures. I have seen many of these fail, but they where on the older vortec trucks with the high pressure systems. I have used the dorman replacements =crap. had them fail with a ruptured inlet or outlet. Only use delco's for replacement. Why someone put that in a 3rd gen no idea, never was installed on them OEM.