S20det redtop maybe issue? Need some help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nurvcom · 07-10-2013, 10:28 AM

ok my Sr20det is working fine...

but just started having fuel smell when i start up or come to a stop at lights and i can smell some in oil as well..

i got new stuff on motor
like
O2 sensor
Water temp
new spark plugs
new knock sensor
new used maf

Car still make power no problem

Part2 question

at 75% throttle my car will over boost to 20psi if i stay in that gear till redline

now if i do 100% throttle car will only boost to 10psi and even under 70% it will only boost to 10psi as well

Mikester · 07-10-2013, 11:24 AM

What kind of boost controller do you have?

nurvcom · 07-10-2013, 11:29 AM

None. I just won greddy prospec a on eBay so I have some soon

Mikester · 07-10-2013, 11:42 AM

With no boost controling mechanism, the turbo is going to boost at whatever pressure happens to be enough to push the wastegate open at the time... given whatever conditions are at hand.

If you have an adjustable actuator, loosen it up.

Other than that, it sounds like the car is operating as it should. As far as fuel in your oil; oil smells different after being ran thru the car... If you aren't losing oil or noticing any smoking, loss of power etc, then chances are everything is good.

nurvcom · 07-10-2013, 12:02 PM

OK. What about the fuel smell when coming to a stop and sitting at stops and startup

Mikester · 07-10-2013, 12:04 PM

Check for leaks at the feed, return, filter, tank, rail & injectors and figure out where it's coming from.

nurvcom · 07-10-2013, 12:37 PM

New 300zx filter new fuel line. And new hoses on tank all and no vac leaks check and I can't find any leaks how hard is it to change injector seals and u think maybe that could be it?

Mikester · 07-11-2013, 11:40 AM

Depends on where the smell is coming from.

Big Zee · 07-11-2013, 04:14 PM

do you see any excess fuel on the intake manifold ?
that would be a good sign of a shot o-ring on the injectors.

nurvcom · 07-11-2013, 06:27 PM

Quote:

Originally Posted by Mikester

Depends on where the smell is coming from.

When idle it fine can't find where coming from under hood

No fuel is leaking onto intake manifold

07-10-2013, 10:28 AM	#1
nurvcom Zilvia Junkie Join Date: Aug 2008 Location: Sevierville TN Posts: 589 Trader Rating: (4) Feedback Score: 4 reviews	S20det redtop maybe issue? Need some help ok my Sr20det is working fine... but just started having fuel smell when i start up or come to a stop at lights and i can smell some in oil as well.. i got new stuff on motor like O2 sensor Water temp new spark plugs new knock sensor new used maf Car still make power no problem Part2 question at 75% throttle my car will over boost to 20psi if i stay in that gear till redline now if i do 100% throttle car will only boost to 10psi and even under 70% it will only boost to 10psi as well __________________ Ripping up the Highway since 03

07-10-2013, 11:24 AM	#2
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 50 Posts: 1,938 Trader Rating: (0) Feedback Score: 0 reviews	What kind of boost controller do you have? __________________

07-10-2013, 11:29 AM	#3
nurvcom Zilvia Junkie Join Date: Aug 2008 Location: Sevierville TN Posts: 589 Trader Rating: (4) Feedback Score: 4 reviews	None. I just won greddy prospec a on eBay so I have some soon __________________ Ripping up the Highway since 03

07-10-2013, 11:42 AM	#4
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 50 Posts: 1,938 Trader Rating: (0) Feedback Score: 0 reviews	With no boost controling mechanism, the turbo is going to boost at whatever pressure happens to be enough to push the wastegate open at the time... given whatever conditions are at hand. If you have an adjustable actuator, loosen it up. Other than that, it sounds like the car is operating as it should. As far as fuel in your oil; oil smells different after being ran thru the car... If you aren't losing oil or noticing any smoking, loss of power etc, then chances are everything is good. __________________

07-10-2013, 12:02 PM	#5
nurvcom Zilvia Junkie Join Date: Aug 2008 Location: Sevierville TN Posts: 589 Trader Rating: (4) Feedback Score: 4 reviews	OK. What about the fuel smell when coming to a stop and sitting at stops and startup __________________ Ripping up the Highway since 03

07-10-2013, 12:04 PM	#6
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 50 Posts: 1,938 Trader Rating: (0) Feedback Score: 0 reviews	Check for leaks at the feed, return, filter, tank, rail & injectors and figure out where it's coming from. __________________

07-10-2013, 12:37 PM	#7
nurvcom Zilvia Junkie Join Date: Aug 2008 Location: Sevierville TN Posts: 589 Trader Rating: (4) Feedback Score: 4 reviews	New 300zx filter new fuel line. And new hoses on tank all and no vac leaks check and I can't find any leaks how hard is it to change injector seals and u think maybe that could be it? __________________ Ripping up the Highway since 03

07-11-2013, 11:40 AM	#8
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 50 Posts: 1,938 Trader Rating: (0) Feedback Score: 0 reviews	Depends on where the smell is coming from. __________________

07-11-2013, 04:14 PM	#9
Big Zee Zilvia Addict Join Date: Oct 2005 Location: BC Age: 37 Posts: 860 Trader Rating: (10) Feedback Score: 10 reviews	do you see any excess fuel on the intake manifold ? that would be a good sign of a shot o-ring on the injectors. __________________ Two-Tone owner#011509-Lightly Modded

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