Lean idle when warm, checked basics - Page 3 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

bmxer882x · 11-30-2014, 06:10 PM

Revival time!

All summer I have been dealing with this exact same issue. Except my wideband only reads to 18 so I'm not sure how lean I really am at idle. It runs great until warmed up then goes lean on idle and cruising. Boost and normal driving is great. Holds 12.1 at wot.

Things I have done
Checked grounds for z32 maf
Tps voltage at .45
New cts
Fuel pump hotwire
New fuel filter
Timing at 15
Boost leak test held to 25 where I stopped
No vac leaks found with carb cleaner
New bov (synapse dv)
New 02

Any advice would be appreciated. Going to try to get another z32 maf to borrow soon. It's ran through the stock Sr intake pipe.

One thing I have noticed is my maf voltage stays at 1.32v on idle and will randomly drop to 1.08 for a split second then raise back to 1.32.

11-30-2014, 06:10 PM	#61
bmxer882x Zilvia Junkie Join Date: Apr 2013 Location: chandler Age: 31 Posts: 370 Trader Rating: (3) Feedback Score: 3 reviews	Revival time! All summer I have been dealing with this exact same issue. Except my wideband only reads to 18 so I'm not sure how lean I really am at idle. It runs great until warmed up then goes lean on idle and cruising. Boost and normal driving is great. Holds 12.1 at wot. Things I have done Checked grounds for z32 maf Tps voltage at .45 New cts Fuel pump hotwire New fuel filter Timing at 15 Boost leak test held to 25 where I stopped No vac leaks found with carb cleaner New bov (synapse dv) New 02 Any advice would be appreciated. Going to try to get another z32 maf to borrow soon. It's ran through the stock Sr intake pipe. One thing I have noticed is my maf voltage stays at 1.32v on idle and will randomly drop to 1.08 for a split second then raise back to 1.32.