Possible fueling issues?

DIGItonium · 06-06-2015, 08:45 PM

Unfortunately all isn't well. The idle surging won't stop, and ECU threw P0507. I sprayed around the intake pipes and vacuum hose to boost gauge sender, and it didn't make a difference.

[EDIT] I pulled up Cipher. The L/R measurements for MAF and AFR looks good, and it's almost exactly alike. Before the maintenance work there was a significant split between the two. AFR correction is still on the high side around 115% at idle, but it was pretty high before the work was done. So far no fuel smell after taking a drive. It seems to run pretty well, but the idle starts to climb from 700 RPM after idling for a few seconds at the light. I'm going to look over the vacuum lines and replace the zip ties with screw bands.

VSS370z · 06-07-2015, 02:32 PM

My car was done nearly 3 months ago and haven't experience any problems except for what you mention about the idling surging. Mine always does it when i put on the a/c its start climbing from around 700 rpms like yours to 1500 and sometimes its stay there,other times it goes down around 1200 rpms and happens every time i stop but if i turn the a/c off the rpms goes back down and the car drive just fine but i need to get that fix cause is makes the engine temperature worst.

06-06-2015, 08:45 PM	#1 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Unfortunately all isn't well. The idle surging won't stop, and ECU threw P0507. I sprayed around the intake pipes and vacuum hose to boost gauge sender, and it didn't make a difference. [EDIT] I pulled up Cipher. The L/R measurements for MAF and AFR looks good, and it's almost exactly alike. Before the maintenance work there was a significant split between the two. AFR correction is still on the high side around 115% at idle, but it was pretty high before the work was done. So far no fuel smell after taking a drive. It seems to run pretty well, but the idle starts to climb from 700 RPM after idling for a few seconds at the light. I'm going to look over the vacuum lines and replace the zip ties with screw bands. __________________ Last edited by DIGItonium; 06-07-2015 at 12:03 AM.

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06-07-2015, 02:32 PM	#2 (permalink)
VSS370z Enthusiast Member Join Date: Apr 2012 Location: Puerto Rico Posts: 380 Drives: 09 Nissan 370z CY M6 Rep Power: 13	My car was done nearly 3 months ago and haven't experience any problems except for what you mention about the idling surging. Mine always does it when i put on the a/c its start climbing from around 700 rpms like yours to 1500 and sometimes its stay there,other times it goes down around 1200 rpms and happens every time i stop but if i turn the a/c off the rpms goes back down and the car drive just fine but i need to get that fix cause is makes the engine temperature worst.