So, finally took my kit car for an IVA, and it failed Mostly stuff I know how to fix, except for emissions.

It's a v4 engine with v2 intake/ecu. All the hoses and stuff are non-standard. Cone air filter. Custom header/exhaust. So, not really a standard subaru

I hit 2 problems at the IVA.
1) Emissions
Natural idle 830 rpm, 0.30% CO (PASS)
Fast idle 2630 rpm, HC 42, Lambda 0.998, CO 0.40 (fail on CO - max 0.20)
2nd fast idle 2740 rpm, HC 32, Lambda 0.990, CO 0.46 (fail on CO - max 0.20)

2) Driving home (first drive!) it was slowwwwww. You could hear the boost, but it made a sound like air leaking, maybe a bit chirpy, and no power at all.
One thing I can think of is the fact there is no speed signal to the ecu... could this cause this problem?

I can't find any exhaust leak. I did find the inlet manifold was not torqued down.. it was finger tight so may well not have been holding boost.

I checked the lambda sensor - it's bouncing between around 0v and around 0.85, which AFAIK seems reasonable.

Is it worth taking it to an mot tester now I've tightened the inlet manifold? Any other ideas?

Thanks,
Dan

 

Hello

Smoke machine test, intake all hose vacuum and exhaust for find a LEAK.

You need to resolve the problem speed signal, check sensor in the Transmission and connector.

Marino