Hello all,

I have a 2005 MDX 157,000 miles. For last 2 months i have been trying to diagnose the source of my cylinder 1 misfire(PO301).
I've noticed that when i leave the car outside over night and start it is when it misfires and sometimes the VTM-4 light comes on with it. If i shut off and restart the VTM-4 goes away.
Now yes i can garage the vehicle but if i leave it outside while im out i would hate to deal with this.
Here is a list of things I've done to help fix it,but was not successful.
1. Replaced spark plus, all 6
2. Replaced Coils, all 6
3. Replaced Fuel injectors, all 6
4. Replaced and cleaned intake manifold seals and throttle body etc.
5. Cleaned EGR and replaced seal
After replacing all the manifold seals and cleaning it. The check engine light didn't come on. Even after local trips and highway driving. But of course it popped up again and now i need HELP.
Thank you in advance for help and reading this post.