What happens when the engine is running at low rpm?
When the engine is running at low RPM, lower temperatures in the combustion chambers prevent all the fuel from burning, so the flow of unburned hydrocarbon gases coming out of the tailpipe increases significantly. The Check Engine light (or Malfunction Indicator Light, MIL, depending on your model) illuminates on your dashboard.
Is it safe to drive with the Check Engine light on?
It could also mean your catalytic converter has given up the ghost. The check engine light means there’s a problem somewhere in your emissions system. Regardless, you’re safe to drive for now as long as the car isn’t performing strangely. Just have the check engine light checked and the problem repaired.
What to do if you have a problem with your car engine?
First, identify the problem you’ve encountered with your engine, then rule out each potential cause. Remember to follow all safety precautions before starting any work on your engine.
What happens when you have an electrical problem in your car?
When your car has an electrical problem you will notice any of the following: The car’s power slowly dies while you’re driving. The car’s lights begin to dim. You have trouble starting the car. The car won’t start at all.
What causes a rough idle on an EGR valve?
A rough idle may be caused by a faulty ignition coil, a vacuum leak, or an ignition system problem. So before spending money and replacing parts, troubleshoot the EGR valve and other system components to try to narrow down the problem.
Why does the valve come alive when I start the engine?
Whenever you start the engine, the valve comes alive and waits in a closed position, blocking the flow of exhaust gases.
When the engine is running at low RPM, lower temperatures in the combustion chambers prevent all the fuel from burning, so the flow of unburned hydrocarbon gases coming out of the tailpipe increases significantly. The Check Engine light (or Malfunction Indicator Light, MIL, depending on your model) illuminates on your dashboard.
What kind of problem does a Toyota 4Runner have?
I have a 1994 Toyota 4Runner 3VZ-E (V6) SR5 with 192K. Recently, it started having problems idling (cold or warm). Symptoms are loping idle from ~200rpm – 1000rpm. Problem comes and goes and does not seem related to the engine temperature.
What kind of injector does uncleturbo 3VZ-E use?
RE UncleTurbo: The 3VZ-E uses a cold start injector opposite the throttle body that outputs directly into the plenum of the manifold. It’s controlled by an injector timer switch. I ran the diagnostic algo on the injector itself, it scoped on the high side of normal but was still in spec. The injector timer switch also scoped out normal.