What can cause misfire on cold start ups?
When the engine is cold the fuel sits in the cylinder and causes a misfire on start up until the cylinder clears its self. This might explain why it is not setting a fault code. Have you checked your spark plugs?
Why does my car misfire only when cold?
When the engine is cold, lots of fuel needs to be added to keep the engine running.My first guess would be weak spark. Get a timing light and check you are getting spark at each cylinder. If you’re dealing with a random misfire that can’t be isolated to a particular cylinder, all the injectors may be dirty.
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Do you have to restart the engine to get a misfire?
NOTE: You MUST restart the engine for the misfire to go away. It will be running rough, turn engine off/on once it is at operating temperature and it’s as smooth as can be, no more misfire. •One time I started the truck, I felt the misfire and drove it to a parts store to read the code.
What is causing an intermittent misfire only when engine?
Cleared the code several times and it kept reporting misfire on cylinder 2. You could also feel the misfire happening. Turned engine off, started it right back up, like before no misfire, cleared the code and it no longer reported a misfire. •This just started intermittently happening.
When does the engine code report misfire on cylinder 2?
•It only happens when you start the engine and the engine is NOT at operating temperature. •The engine code always reports misfire on Cylinder #2 I put in a new plug and swapped coils but it still reports the misfire on cylinder #2.
Why does my car run fine when the engine is cold?
Maybe there are two problems. The first is that the car should run fine even on cold starts. That could be due to an air leak, or a fuel pressure problem, either could cause a lean mixture, which would be most noticeable when the engine is cold.