Dirty Intake manifold - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

defwing · 05-28-2006, 04:58 AM

I have a recently installed blacktop 180sx sr20det that has been fouling its spark plugs very quickly. It is also fouling the intake manifold, what could be causing it to foul?

defwing · 05-29-2006, 04:50 AM

Sorry maybe more info will be helpful,

Mods:
FMIC
atmo bov(but tightened up so doesnt open)
t28
EGR rerouted(doesnt feed into intake manifold)
walbro fuel pump

Boost gauge reads idle vacuum @ -.8bar. Pretty steady until it does idle surging which occasionaly does(because of fouled plugs?).
Fuel pressure seems to be ok @ 38psi, but im reading it with a oil pressure gauge lol.
Lately it seems to be stuck on high idle(2krpm) and timing on the powerfc shows 40degrees, although it used to sit at 17 with lower idle in past.
Knock sensor reading ultra high too but maybe coz of forged psitons??

Any help or ideas would be appreciated thanks. Thing that puzzles me is fouling of intake.

yokotas13 · 05-29-2006, 05:03 AM

loosen the BOV so it lets air out...yuo kind of have to.
id imagine you just need a good tune due to the seasons changing

05-28-2006, 04:58 AM	#1
defwing Join Date: Apr 2003 Location: new zealnd Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Dirty Intake manifold I have a recently installed blacktop 180sx sr20det that has been fouling its spark plugs very quickly. It is also fouling the intake manifold, what could be causing it to foul?

05-29-2006, 05:03 AM	#3
yokotas13 Post Whore! Join Date: Apr 2006 Location: Milford, CT Age: 40 Posts: 10,519 Trader Rating: (8) Rides Gallery: yokotas13 Feedback Score: 8 reviews	loosen the BOV so it lets air out...yuo kind of have to. id imagine you just need a good tune due to the seasons changing __________________ 2015 Subaru Outback Overlander - Wagonofdoom

05-29-2006, 04:50 AM	#2
defwing Join Date: Apr 2003 Location: new zealnd Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Sorry maybe more info will be helpful, Mods: FMIC atmo bov(but tightened up so doesnt open) t28 EGR rerouted(doesnt feed into intake manifold) walbro fuel pump Boost gauge reads idle vacuum @ -.8bar. Pretty steady until it does idle surging which occasionaly does(because of fouled plugs?). Fuel pressure seems to be ok @ 38psi, but im reading it with a oil pressure gauge lol. Lately it seems to be stuck on high idle(2krpm) and timing on the powerfc shows 40degrees, although it used to sit at 17 with lower idle in past. Knock sensor reading ultra high too but maybe coz of forged psitons?? Any help or ideas would be appreciated thanks. Thing that puzzles me is fouling of intake.