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re: Car Stalling After Emissions Test
Posted on 3/6/26 at 6:12 am to UptownJoeBrown
Posted on 3/6/26 at 6:12 am to UptownJoeBrown
quote:
Holy cow! What State is this in? California?
LOL, basically every state that has emissions tests will have visual inspection of emissions control devices to ensure they are in place and not tampered with as part of the routine procedure. On a gasoline engine, that is usually the PCV, EGR, and cat(s). EGR valves, especially on transverse mounted engines, are often in hard to see and it is possible a hard arse might poke around to see if it is a functional valve. In doing so, you might cause a leak or knock it out of either the intake or exhaust manifold. If that happens, the car will run like shite, as I said, it feels and sounds very much like having a cylinder (or two) misfiring.
One example of why visual inspection is important is the common way to spoof a good signal from a bad cat is with a O2 sensor spacer which a visual inspection should catch. Harder to catch is an electronic simulator which sends "correct" signals to the ECU cutting the O2 sensor out of the electrical loop.
All of the possibilities are pretty uncommon in this scenario, but the temporal correlation is hard to ignore.
This post was edited on 3/6/26 at 6:22 am
1
Posted on 3/6/26 at 6:19 am to Obtuse1
I have a car to inspect soon at a mom and pop. I’ll watch to see if they do any of this. BR.
Posted on 3/6/26 at 6:41 am to jttasty
quote:
I had an emissions test today.When I started my car after the test, it shook and died. The battery tested normally, but it started with a jump. I let it run for an hour afterwards, and it died again.There is no check engine light. Any suggestions. Thanks in advance.
Did you check your blinker fluid? You may be low.
Posted on 3/6/26 at 6:48 am to billjamin
No, that would cause a check engine light. Would cause a lean or rich situation also
Posted on 3/6/26 at 6:50 am to jttasty
They forgot to top off your blinker fluid. That's notorious for creating the issue you're talking about.
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