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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 |
Zilvia Junkie
![]() Join Date: Dec 2009
Location: phoenix az
Age: 43
Posts: 460
Trader Rating: (1)
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could bad gas cause this?
The story is I bought a sr20det 240 coupe and its been sitting while I buy more parts for it,The setup is pretty much stock ie,.
redtop sr walbro 255lph greddy fmic electric fan hks downpipe little buddy club battery other then that its stock I check the plugs and all have the white tips,The car runs just fine but the gas is almost 4 months old,Also the gap was at 0.40 which was a huge gap which should be around 0.28,The cars been running 7 psi boost since I bought it and I have no wideband to monitor afr at the moment,I know the white usually meens heat/lean but I'm wondering if old gas could play a roll in this?Timing is stock still havent checked fuel pressure but I'll do it tomarrow.Everything seems good but the plugs make me worried. The plugs are BKR7E,Any input on what I should check next?Could the gap being that far off or bad gas cause this?Also noticed when I wired in the electric fans it seems to steal some of the fuel pumps power so maybe I should rewire the pump or ground it out better,seems like most things running on acc are taking some juice from the pump ![]() ![]() Last edited by spools420a; 07-27-2010 at 01:48 AM.. |
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#2 |
Zilvia Junkie
![]() Join Date: Dec 2009
Location: phoenix az
Age: 43
Posts: 460
Trader Rating: (1)
![]() Feedback Score: 1 reviews
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Great now I'm second guessing myself,It seems I cant go off the ground strap on the spark plug for a/f ratios theory says thats for telling spark plug heat range and timing indicator.....
Reading Spark Plugs Correctly Spark plug reading ^^ ^^ So if this is the real way to read a plug then my car is actually running rich because of the black soot on the base ring (the jetting)and porcelan is a light brownish. If this is the case then where did the white shit come from on the ground strap? I'm thinking the massive 0.40" + ish gap was turning the tip white like that but I'm still gonna double check some stuff and ditch that crappy old gas before I drive it.This whole time Ive been investigating a lean condition and according to the internet I was wrong all along =/ fck me... Last edited by spools420a; 07-27-2010 at 05:50 AM.. |
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