SR Running Super Rich!!!!!! HELP!!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

speedfiend · 04-08-2008, 05:35 PM

Yeah I was just fixing to say I checked all my spark plugs today and they are all burning the same. Therefore I doubt an o-ring is leaking since it would have to be on all four injectors.

As for the MAF wiring, the MAF has been in my car and running fine for a little over a year now so I dont suspect that as being the culprit. Plus when I unplug it there is a noticable difference in idle so I know it is working properly.

I have checked for leaks all over the place and cant come up with anything. The only place that I could suspect a leak would be at the intake mani to the block where I installed a circuit sports plastic intake mani gasket instead of the oem metal one. The new gasket is about an 1/8" thick so the injectors sit a little further back from the manifold. First of if this were leaking I would suspect it would cause a lean condition since it is taking in unmeasured air. Second off once again wouldnt it be a lean condition if the injectors were sitting to far back due to the gasket thickness?

Unfortunately I am beginning to suspect the tune might be just to rich. I am going to try dropping my fuel pressure down from stock to about 32-34 psi and see how that effects the situation.
Thanx, Cameron

04-08-2008, 05:35 PM	#19
speedfiend Zilvia FREAK! Join Date: Feb 2002 Location: Destin, Fl./Houston, Tx. Age: 40 Posts: 1,206 Trader Rating: (68) Feedback Score: 68 reviews	Yeah I was just fixing to say I checked all my spark plugs today and they are all burning the same. Therefore I doubt an o-ring is leaking since it would have to be on all four injectors. As for the MAF wiring, the MAF has been in my car and running fine for a little over a year now so I dont suspect that as being the culprit. Plus when I unplug it there is a noticable difference in idle so I know it is working properly. I have checked for leaks all over the place and cant come up with anything. The only place that I could suspect a leak would be at the intake mani to the block where I installed a circuit sports plastic intake mani gasket instead of the oem metal one. The new gasket is about an 1/8" thick so the injectors sit a little further back from the manifold. First of if this were leaking I would suspect it would cause a lean condition since it is taking in unmeasured air. Second off once again wouldnt it be a lean condition if the injectors were sitting to far back due to the gasket thickness? Unfortunately I am beginning to suspect the tune might be just to rich. I am going to try dropping my fuel pressure down from stock to about 32-34 psi and see how that effects the situation. Thanx, Cameron