Fuel system troubleshoot? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

91s13ForMeeh · 05-02-2011, 08:52 AM

Whats up guys? I recently picked up a s13 coupe and she seems to guzzle the gas. I Filled the tank The otherday, drove almost 200 miles and I'm now below empty. No engine mods either. Just a straight pipe from the cat back. Any suggestions? Clean air filter cleaned maf, changed oil+stabilizer plugs are good too.

hulkster_s13 · 05-02-2011, 09:45 AM

Check your lines you got a leak most likely.

jdm213 · 05-02-2011, 09:45 AM

how about fuel filter

91s13ForMeeh · 05-02-2011, 11:31 AM

Hmm. Seems as if the leak is coming from the injectors. I was Just going over the fuel system and I found that 3 of my 4 injectors fall out of resistance specs. Think this might be a result of the straight pipe and back pressure issues?

ZeeRasta · 05-24-2011, 06:29 AM

Quote:

Originally Posted by 91s13ForMeeh

Hmm. Seems as if the leak is coming from the injectors. I was Just going over the fuel system and I found that 3 of my 4 injectors fall out of resistance specs. Think this might be a result of the straight pipe and back pressure issues?

Most likely just old worn out injectors. Mine are like that now.

91s13ForMeeh · 05-24-2011, 11:26 AM

Quote:

Originally Posted by ZeeRasta

Most likely just old worn out injectors. Mine are like that now.

Well the injectors were off spec by about an ohm. I talked to my instructor at school and he was saying I'm fine and to leave them. I'm still not getting the mileage though. I'm somewhere around 23-24 mpg. It'd be nice to get that extra 2-3 mpg. Anyways I went to smog it the other day and it failed. Gross poluter and evap system leak test fail. It turns out my fuel tank gasket wasnt sitting right. There's our evap issue. Second of all my timing was at 8 degrees! FYI I just picked the car up. Advanced timing etc. HC fail @ 100 ppm or so.. Jesus my truck just passed at 11 hc ppm. Gotta be my cat. lolz

05-02-2011, 08:52 AM	#1
91s13ForMeeh Join Date: May 2011 Location: NorCal Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Fuel system troubleshoot? Whats up guys? I recently picked up a s13 coupe and she seems to guzzle the gas. I Filled the tank The otherday, drove almost 200 miles and I'm now below empty. No engine mods either. Just a straight pipe from the cat back. Any suggestions? Clean air filter cleaned maf, changed oil+stabilizer plugs are good too.

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05-02-2011, 09:45 AM	#2
hulkster_s13 Zilvia Member Join Date: Nov 2005 Location: down by da beach Posts: 276 Trader Rating: (9) Feedback Score: 9 reviews	Check your lines you got a leak most likely.

05-02-2011, 09:45 AM	#3
jdm213 Zilvia Addict Join Date: Sep 2009 Location: los angeles Age: 31 Posts: 957 Trader Rating: (10) Feedback Score: 10 reviews	how about fuel filter

05-02-2011, 11:31 AM	#4
91s13ForMeeh Join Date: May 2011 Location: NorCal Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Hmm. Seems as if the leak is coming from the injectors. I was Just going over the fuel system and I found that 3 of my 4 injectors fall out of resistance specs. Think this might be a result of the straight pipe and back pressure issues?