Drove my Stock TTA 600 miles yesterday. Car was perfect when I started and had a minor miss at idle when I got home.
Emission Test Results: Passed the Fast Idle portion of the emissions test (135.0 PPM HC), but not the idle portion (527 PPM HC). Passed the other tests and the visual.
Got new plugs (43CRTS) to install tomorrow. Checked the plug wires good with impedance under 1k ohms. Put butane gas, via unlighted torch, around all the vacuum lines I could trace, no difference (it did sound a lot like other vacuum leaks I've had in the past).
If the plugs do not cure the miss, I'll look for some other things. Could I have an injector problem?
Any suggestions? Keep it real simple if you can....Thanks
An update on low idle miss: Plugs were the perfect color with a gap of about .030 (regapped to .035 and reinstalled those plugs.)
Fuel pressure (everything still hooked up) was 42psi at idle. 32psi 13 minutes later and still 32psi 22 minutes later. What does that tell me about the injectors?
Fuel pressure is ok if the drop is sudden than there is a problem. After 22min your pressure is still holding. Keeping it simple high HC is the
raw,unburned fuel look for ignition problems,wrong
spark advance curves,mechanical engine problems,cam overlap and a very lean mixture