3sge pinging

**Dale** · 19-02-2006, 10:14 PM

Flange gasket

**3sgte** · 20-02-2006, 02:34 AM

You said it is a Gen 2 motor on Gen 1 "hardware".

It is probably running lean under the conditions that it is pinging.

You could monitor the O2 sensor to confirm this, or do something to richen it up.
Are the Aus Gen 1 3SG airflow meter type?
If so, mark the original position of the spring in the airflow meter, and then loosen the spring about 2-3 notches.

I used mine with the Gen 2 manifolds and injectors, using the Gen 1 ECU. No pinging, but a definite flat spot until I gave it a little more fuel.

As Dale alluded to, check for intake leaks. Given that you just finished the swap, a double check of the basics couldn't hurt.

Could you confirm what is meant by "short motor"?
I don't want to base suggestions on a possible misunderstanding.

**Rodger** · 21-02-2006, 12:52 PM

NeoNasty,

Have you had a full injector service? On both your car and you misses 3S-FE?

My wife had an ST162-ST with 3S-FE and it started to ping as you have discribed. We had the injectors serviced. Two injectors were at 50% flow before cleaning. Once back together the pinging was gone.

Regards

Rodger

**RobST162** · 21-02-2006, 12:56 PM

Yeah I'd recommend that.

Also bear in mind that if it's a JDM 3SGE the comp ratio will demand a 98 petrol if you expect no pinging. I know of some of the 162 guys with JDM 3SGEs who ping unless they put in 98, and kept pinging even so till they got the JDM ECU, however, the good fuel offset the issue somewhat.

Just a thought.

**NeoNasty** · 21-02-2006, 01:42 PM

OK. Ive run some injector cleaner through it, and the problem is fine, in the morning.

In the afternoon, when everything is hotter it starts pinging again, under light throttle at about 2200 to 2700 RPM. I didnt actually do the conversion, It was in the car when I got it.

My next step was to get the injectors cleaned properly, give it a cold air intake. I have heard about the engine really requiring the jap ecu aswell. Hoping I could avoid that.

I didnt realise that the AFM was adjustable, it is the flapper sort, perhaps I should look at that, but I will do that last of all. maybe those ebay performance chips would work (resistor in line with the oxygen sensor) would help me richen it a little.