SR20DET idles extremely rich and stalls - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nikzilla · 12-19-2013, 12:13 PM

Hi guys!

I just put my motor back together and I'm trying to get the car running right.

It's an S13 blacktop with FMIC, 3 inch turbo-back and some aftermarket fans (bought this car recently).

I just did a bit of work on the motor, mostly maintenance and cleaning.
I installed RAS, fuel pressure sensor (T'ed off after fuel filter), wideband oxygen sensor bung, and tapped a boost gauge line into the intake manifold collector. (note: I didn't wire up the gauges yet)
The work involved dis-assembly of the intake manifold collector, and valvetrain.

The car fires right up, and runs fine (sounds a bit wierd though) for about 10sec, after which it just bogs and dies.
If I tap the gas as it's bogging, it will rev up normally, and as soon as the RPM's return, it bogs and dies again.

My narrowband gauge (which I'm not sure if it's working because the purple wire is disconnected for it), is pretty much bottoming out on the rich side, and the plugs are wet and reek of fuel.

Disconnecting MAF makes no difference, and when I pinched the fuel hose, it just died quicker.

When I was reassembling the valvetrain, I was a bit skeptical as to whether I got the alignment marks correct on the timing chain, because at TDC the keyhole for the exhaust camshaft isn't dead on 12 o'clock, it's more like 12:30. But unfortunately it doesn't idle steady enough for me to check timing yet.

Don't think it's a vacuum leak because the car should run lean instead of rich, and don't think timing would cause a rich condition.

Any advice?

Thanks!

12-19-2013, 12:13 PM	#1
Nikzilla Zilvia Member Join Date: Jun 2013 Location: Los Angeles Age: 30 Posts: 291 Trader Rating: (0) Feedback Score: 0 reviews	SR20DET idles extremely rich and stalls Hi guys! I just put my motor back together and I'm trying to get the car running right. It's an S13 blacktop with FMIC, 3 inch turbo-back and some aftermarket fans (bought this car recently). I just did a bit of work on the motor, mostly maintenance and cleaning. I installed RAS, fuel pressure sensor (T'ed off after fuel filter), wideband oxygen sensor bung, and tapped a boost gauge line into the intake manifold collector. (note: I didn't wire up the gauges yet) The work involved dis-assembly of the intake manifold collector, and valvetrain. The car fires right up, and runs fine (sounds a bit wierd though) for about 10sec, after which it just bogs and dies. If I tap the gas as it's bogging, it will rev up normally, and as soon as the RPM's return, it bogs and dies again. My narrowband gauge (which I'm not sure if it's working because the purple wire is disconnected for it), is pretty much bottoming out on the rich side, and the plugs are wet and reek of fuel. Disconnecting MAF makes no difference, and when I pinched the fuel hose, it just died quicker. When I was reassembling the valvetrain, I was a bit skeptical as to whether I got the alignment marks correct on the timing chain, because at TDC the keyhole for the exhaust camshaft isn't dead on 12 o'clock, it's more like 12:30. But unfortunately it doesn't idle steady enough for me to check timing yet. Don't think it's a vacuum leak because the car should run lean instead of rich, and don't think timing would cause a rich condition. Any advice? Thanks!