Check engine light/gas cap

sonic370 · 06-15-2010, 07:46 PM

Has anyone been thru this issue. Am now on my second gas cap from the dealership they have replaced gas cap twice and the light will come back on after a few days. The cap never seems like it fits right will go to open it and
its already backed off a turn. just wondering if anyone else has been thru this.

shadoquad · 06-15-2010, 07:49 PM

Going through it. A friend of mine has a code reader, so I just re-tighten the cap, throw on the code reader to make sure it's not anything significant, and then turn the light off through the reader.

shadoquad · 06-15-2010, 07:51 PM

It's this one...

OBD-II C.A.N. AUTOSCANNER TRILINGUAL CODE READER - JCWhitney

Modshack · 06-15-2010, 09:08 PM

Quote:

Originally Posted by sonic370

Has anyone been thru this issue. Am now on my second gas cap from the dealership they have replaced gas cap twice and the light will come back on after a few days. The cap never seems like it fits right will go to open it and
its already backed off a turn. just wondering if anyone else has been thru this.

Sounds like you're dealer has failed to diagnose the real problem. They're Taking the lazy way out and throwing caps at it when their may be real problem with the car in the fill tube or tank venting. Take it back and have them fix it..

puckman77 · 06-15-2010, 09:17 PM

I had this problem, the dealer reset, then it came back. Upon closer inspection of the gas cap, I surmised that the o-ring was susceptible to uneven flexing if torqued too hard (the usually attempted remedy). I now simply put the cap in the hole, properly line it up, then use thumb and forefinger to lightly tighten until ONE click (no posted requirement to go to three clicks like on most other applications). Problem has not recurred in over a year. Most other gas caps have flat gaskets but ours is big and round. Try it, it's a free fix!

PapoZalsa · 06-15-2010, 09:38 PM

Quote:

Originally Posted by puckman77

I had this problem, the dealer reset, then it came back. Upon closer inspection of the gas cap, I surmised that the o-ring was susceptible to uneven flexing if torqued too hard (the usually attempted remedy). I now simply put the cap in the hole, properly line it up, then use thumb and forefinger to lightly tighten until ONE click (no posted requirement to go to three clicks like on most other applications). Problem has not recurred in over a year. Most other gas caps have flat gaskets but ours is big and round. Try it, it's a free fix!

Might be, might not! But I think is only one click like you stated.

kenchan · 06-15-2010, 10:18 PM

Quote:

Originally Posted by Modshack

Sounds like you're dealer has failed to diagnose the real problem.

^^ +1

Jordo! · 06-15-2010, 10:43 PM

Do you tend to fill up even after the filler clicks off? If so, you may have killed the vent valve...

sonic370 · 06-16-2010, 08:01 AM

thanks for the advice i'll try all. going to the dang dealer again next week and will bring up the filler tube and tank.

06-15-2010, 07:46 PM	#1 (permalink)
sonic370 A True Z Fanatic Join Date: May 2010 Location: Orange Texas Posts: 1,574 Drives: 09 370Z Sports PGK Rep Power: 17	Check engine light/gas cap Has anyone been thru this issue. Am now on my second gas cap from the dealership they have replaced gas cap twice and the light will come back on after a few days. The cap never seems like it fits right will go to open it and its already backed off a turn. just wondering if anyone else has been thru this.

06-15-2010, 10:43 PM	#8 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	Do you tend to fill up even after the filler clicks off? If so, you may have killed the vent valve... __________________ Enjoy it. Destroy it.

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06-15-2010, 07:49 PM	#2 (permalink)
shadoquad A True Z Fanatic Join Date: Apr 2010 Location: . Posts: 42,608 Drives: . Rep Power: 3885	Going through it. A friend of mine has a code reader, so I just re-tighten the cap, throw on the code reader to make sure it's not anything significant, and then turn the light off through the reader.

06-15-2010, 07:51 PM	#3 (permalink)
shadoquad A True Z Fanatic Join Date: Apr 2010 Location: . Posts: 42,608 Drives: . Rep Power: 3885	It's this one... OBD-II C.A.N. AUTOSCANNER TRILINGUAL CODE READER - JCWhitney

06-15-2010, 09:17 PM	#5 (permalink)
puckman77 Base Member Join Date: Apr 2009 Location: Connecticut Posts: 22 Drives: 09 Z Blue AT T/S/NAV Rep Power: 16	I had this problem, the dealer reset, then it came back. Upon closer inspection of the gas cap, I surmised that the o-ring was susceptible to uneven flexing if torqued too hard (the usually attempted remedy). I now simply put the cap in the hole, properly line it up, then use thumb and forefinger to lightly tighten until ONE click (no posted requirement to go to three clicks like on most other applications). Problem has not recurred in over a year. Most other gas caps have flat gaskets but ours is big and round. Try it, it's a free fix!

06-16-2010, 08:01 AM	#9 (permalink)
sonic370 A True Z Fanatic Join Date: May 2010 Location: Orange Texas Posts: 1,574 Drives: 09 370Z Sports PGK Rep Power: 17	thanks for the advice i'll try all. going to the dang dealer again next week and will bring up the filler tube and tank.