Piston Slap: Shark's on a Purging Diet?

Sajeev Mehta
by Sajeev Mehta
piston slap sharks on a purging diet

TTAC reader Tiburon Guy writes:

2001 Tiburon ( yep, this one again): Gassing up clicks like it’s full, even after only a dollar, then keeps clicking. Tank is at an 8th when fueling and yes, i’ve made sure it’s not the nozzle (and does it no matter where I go).

OBDII code PO441 Small Evap Leak (changed gas cap, no difference) Had a buddy pull the charcoal filter from the back of the car and cleaned it out, no difference. Becoming a big pain in the arse now since every time I gas up it spits out at me and takes literally 30+ minutes to fill up.

Please help!

Sajeev answers:

No offense to Mr. Tiburon Guy (he seems cool) but this query is precisely why we have message forums. P0441 is a code you type into a forum/search engine and get an immediate answer. I like this website to get the ball rolling. It gives a good description of the problem(s) and the systems involved.

Once again, more shame: you just threw away money on a new gas cap for no good reason! I know it was the easy thing to do, but it wasn’t gonna work. So here’s the deal, a P0441 code means several things:

1. Blocked up charcoal canister, perhaps cleaning the filter was never gonna fix anything?

2. Blocked or bad canister purge valve, or the vacuum/electrics behind it are toast. This is my guess to your problem.

3. Physical damage to venting system, or fueling system.

A quick bit of googling came up with this thread on Hyundaiforum.com; mandatory reading before doing anything. Then find a similar thread about the Tiburon instead. Once you have all the right information, examine the system for damage and follow their instructions. If all else fails, buy the shop manual(s) and do it all step-by-step from there. You will find your problem. Best of luck.

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry.

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 3 comments
  • Jhefner Jhefner on Sep 10, 2012

    "No offense to Mr. Tiburon Guy (he seems cool) but this query is precisely why we have message forums. P0441 is a code you type into a forum/search engine and get an immediate answer. I like this website to get the ball rolling. It gives a good description of the problem(s) and the systems involved." +1000 The Taurus Car Club of America forum is the first place I go when I have questions or issues with the Blue Goose. Last Friday, it lost 2 quarts of transmission fluid (most of it all over the driveway) after a 2 hour drive in rush hour in 103 degree heat on the way home. After panicing, I asked on the forum, and determined it was a worn torque converter stator bearing; when the transmission gets hot, the fluid gets thinner and leaks out past the bearing. I added two quarts and drove it around town; no leaks, and none in coming this morning in 83 degree heat. So, that is probably it; thank God for the TCCA forum and that the heat wave has finally broken in our part of the world.

    • See 1 previous
    • Golden2husky Golden2husky on Sep 11, 2012

      @True_Blue I go there as well for support for my 92...good source of info

  • SCE to AUX I would normally go right away, except that the latest trend is to simply advise you of a problem before they have an actual solution.Two of my cars are under safety recall right now, and I scheduled them for sequential days but the soonest I could get in was 4 weeks. So much for safety.
  • SCE to AUX I didn't know they had 80 employees to lose.
  • SCE to AUX Discounting for EPA estimates, full load, and working strictly between 20% and 80% charge, I estimate about 80 miles of real, actual range.Useful, I suppose, but definitely local service. If you can refill over lunch then maybe you can double that distance.Delivery work is notoriously fuel inefficient, so an electric van could make business sense depending on the MSRP.
  • Syke Just got my Bolt's battery recall done yesterday. Happily, we've got a dealer that's supporting the Bolt competently, getting the battery kit was supposed to take five weeks since I signed the work order. It took two and a half. Pulled the car in 0730 Monday, got a call at 1600 that afternoon saying I could pick it up. Didn't get down there until this morning, 255 miles range with frost on the windows. I'm happy.
  • Syke Nice. Competent. Definitely a useful tool.
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