05-21-2022, 03:28 AM
Hey guys,
I have a 1996 Tracker, 2WD, 5 Speed, 16 valve.
I just put a new doug thornley header on it and a brand new magnaflow CAT. The car drives great!
However I failed California smog. The hydrocarbon sniff test read around 90ppm, and the max allowed is around 60.
I think the car is running rich at idle. If I drive the car for a while and then stop, I dont see any smoke. But if I let it idle for a few minutes, and then give it a bit of gas in neutral, it spits out a little bit of smoke.
This is what I have done so far:
I have no idea whats going on. All the other readings from the smog test looked good- the only thing that failed was the high HC at 15mph.
Like I said, it seems to run rich during idle.
When I check my spark plugs, the top electrode is kind of white in color, which indicates lean...but I'm running rich.
What gives? Anything else I should check?
im currently running penzoil 5W-30. Should I try increasing the weight of the oil just for the smog test? What oil weight do you recommend?
Thanks for all your help
Sina
I have a 1996 Tracker, 2WD, 5 Speed, 16 valve.
I just put a new doug thornley header on it and a brand new magnaflow CAT. The car drives great!
However I failed California smog. The hydrocarbon sniff test read around 90ppm, and the max allowed is around 60.
I think the car is running rich at idle. If I drive the car for a while and then stop, I dont see any smoke. But if I let it idle for a few minutes, and then give it a bit of gas in neutral, it spits out a little bit of smoke.
This is what I have done so far:
- New spark plugs (NGK BKR6E), gapped at .028
- New dizzy cap and wires
- New ISC
- New EGR valve
- New air filter
- Made sure timing is at 5 degrees using a timing light
- Valve tappet adjustment
- Checked duty cycle, set at 50% when idling hot
- New thermostat. ECT sensor reads 300ohms when hot
- FUEL PRESSURE TEST: Key on was at 42, and held at around 40 for at least a minute. Idling, I got around 32psi
- I checked the continuity of the fuel injector and replaced the o rings etc...
- COMPRESSION: did a compression test on a warm engine and I got anywhere between 163-175 on all pistons
- the check engine light is NOT on
- Both 02 sensors are less than 6 months old. I backprobed the upstream 02 sensor during idle, and it was fluctuating between 100mV-800mV. Is this normal for it "swing"
- Cleaned my MAF. At idle, it shows 2 volts while back probing. If I give it throttle, it goes to 3V
- EGR VSV and EVAP VSV have correct resistance and "click" when I apply voltage using a battery
I have no idea whats going on. All the other readings from the smog test looked good- the only thing that failed was the high HC at 15mph.
Like I said, it seems to run rich during idle.
When I check my spark plugs, the top electrode is kind of white in color, which indicates lean...but I'm running rich.
What gives? Anything else I should check?
im currently running penzoil 5W-30. Should I try increasing the weight of the oil just for the smog test? What oil weight do you recommend?
Thanks for all your help
Sina