OVERfueling problems...

phoenix s14 · Post by **phoenix s14** » Thu Oct 02, 2008 12:07 am

I have checked the wiring. I have checked the ECU (no chip), I have checked output from all sensors, so why o why is my SR overfueling when the boost kicks in???

Like I said in my FMIC questions... 0.9 bar with a t3/t4 turbo.

Needing help yet again...

HancoB · Post by **HancoB** » Thu Oct 02, 2008 12:10 am

How do you know its over fueling? And how do you know its only on boost?

My car was over fueling badly when my exhaust manifold gasket was leaking.

phoenix s14 · Post by **phoenix s14** » Thu Oct 02, 2008 12:16 am

Have fitted a A/F Guage and can see the cloud of fuel behind me and when the boost comes in the guage reads do rich that it goes off the scale

also when cruising it gets good mileage but boosting it does about 200km on a tank

Thinking about fitting dictator or similar to sort it out and get it mapped properly... just want to see if I can avoid the cost for now...

HancoB · Post by **HancoB** » Thu Oct 02, 2008 12:20 am

If it is a auto gauge A/F gauge then don't trust it. So many people have tried it and it doesn't work.

Best bet is to take it to the Dyno and see what it says there.

veecee · Post by **veecee** » Thu Oct 02, 2008 5:57 am

hang on - a stock s14 sr20det with a a t3/t4 at 0.9 boost should be quite lean on boost cos thats a lot more air than standard...

PFB - am i right in saying that?

HancoB · Post by **HancoB** » Thu Oct 02, 2008 8:18 am

veecee wrote:hang on - a stock s14 sr20det with a a t3/t4 at 0.9 boost should be quite lean on boost cos thats a lot more air than standard...

PFB - am i right in saying that?

Very true yes!

RB25SX · Post by **RB25SX** » Thu Oct 02, 2008 8:21 am

Check your feul presure regulator, it might raise the presure to high under boost.

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Thu Oct 02, 2008 8:49 am

hang on - a stock s14 sr20det with a a t3/t4 at 0.9 boost should be quite lean on boost cos thats a lot more air than standard...

PFB - am i right in saying that?

To HancoB don’t assume, Nissans stock maps are extremely rich and
without knowing much about your turbo I can’t really say.

As for you AFR gauge its total rubbish and a waste of time and money you don’t really have a clue where your AFR’s are sitting at Sorry just being honest.

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Thu Oct 02, 2008 9:20 am

I mean looking at the stock Euro S14 Map, I am seeing above 10:1 AFR from 3200RPM up and at 5600 Rpm it shotting for 9.62 AFR damn rich.

phoenix s14 · Post by **phoenix s14** » Thu Oct 02, 2008 12:47 pm

yeah that's the thing... the car goes off the scale i.e it gives a reading over 10:1 and the guage runs to 10 only so... and my guage is digital and was checked with a analyser and pretty spot-on...

the cloud of fuel is really not cool and is physically eating my wallet...

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Thu Oct 02, 2008 1:05 pm

Ow Ok so its a wideband AFR guage...

Thats kick-ass I thought it was an autguage crap o meter my bad