1 month burnt plugs - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sr28 · 08-20-2007, 03:39 PM

Im havin a few issues with my sr20... i have a walbro fuel pump because the old one burnt out... stock fpr.. now i replaced my plugs a month ago because the car was running a really rough idle.. it helped.. but it didnt fix the idle..

my car wouldnt start the other day so i changed out the relays (for the 2nd time) and it started.. my plugs are black... i changed them out.. ran the car for 2 minutes and took them out.. black again any ideas?

DJ_Sunrise · 08-20-2007, 06:15 PM

Where in NJ are you.

-Bart

frosti108 · 08-20-2007, 06:22 PM

atlantic city area here!

sounds like your runnin rich rich rich

reflexdb · 08-20-2007, 07:14 PM

Black plugs can be caused by a number of things. But it sounds like too much unburnt fuel in the cylinders. If you have a stock fpr, you must have the correct fuel pressure, so I don't see the pump being a problem. So, for some reason the injector pw is too long. Check your sensors (see fsm)...MAF and MAP, one could be bad.

godzilla_753 · 08-20-2007, 07:30 PM

it could be that the stock fpr cant handle the enormous amount of fuel being spit out of the walbro

at least thats what happened to me

georgesal · 08-20-2007, 09:03 PM

it can also be leaky injectors, bad ecu, a number of different things, do you get any smoke?

08-20-2007, 03:39 PM	#1
sr28 Join Date: Aug 2007 Location: NJ Age: 37 Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	1 month burnt plugs Im havin a few issues with my sr20... i have a walbro fuel pump because the old one burnt out... stock fpr.. now i replaced my plugs a month ago because the car was running a really rough idle.. it helped.. but it didnt fix the idle.. my car wouldnt start the other day so i changed out the relays (for the 2nd time) and it started.. my plugs are black... i changed them out.. ran the car for 2 minutes and took them out.. black again any ideas?

08-20-2007, 06:22 PM	#3
frosti108 Zilvia Member Join Date: Mar 2006 Location: Norristown, PA Posts: 281 Trader Rating: (1) Feedback Score: 1 reviews	atlantic city area here! sounds like your runnin rich rich rich __________________ Goodnight

08-20-2007, 07:14 PM	#4
reflexdb Zilvia Junkie Join Date: Feb 2004 Location: Denver, CO Age: 40 Posts: 381 Trader Rating: (6) Feedback Score: 6 reviews	Black plugs can be caused by a number of things. But it sounds like too much unburnt fuel in the cylinders. If you have a stock fpr, you must have the correct fuel pressure, so I don't see the pump being a problem. So, for some reason the injector pw is too long. Check your sensors (see fsm)...MAF and MAP, one could be bad. __________________

08-20-2007, 06:15 PM	#2
DJ_Sunrise Zilvia FREAK! Join Date: Feb 2004 Location: NJ Age: 38 Posts: 1,134 Trader Rating: (1) Feedback Score: 1 reviews	Where in NJ are you. -Bart

08-20-2007, 07:30 PM	#5
godzilla_753 Leaky Injector Join Date: May 2006 Location: Dallas Posts: 83 Trader Rating: (0) Feedback Score: 0 reviews	it could be that the stock fpr cant handle the enormous amount of fuel being spit out of the walbro at least thats what happened to me

08-20-2007, 09:03 PM	#6
georgesal BANNED Join Date: Oct 2006 Location: Los Angeles Age: 40 Posts: 842 Trader Rating: (2) Feedback Score: 2 reviews	it can also be leaky injectors, bad ecu, a number of different things, do you get any smoke?