2001 Honda Insight with 212,000 miles. Just noticed it in the last week on the first start of the morning. It feels rough and the engine is shaking like it might be running on 1 or 2 cylinders. After about 20 seconds it smooths out. Runs great at other times. Has the correct Honda plugs which were in good shape when I checked them 1,000 miles ago. Checked for codes and have P0300 P0302 P0303 all pending. Since it only lasts 20 seconds on the first start of the day, testing things is difficult. Assume it's either injectors or coils. Thought about removing #2 and #3 coils and putting them in the freezer for an hour after the car has warmed up, then putting them back on to see if the missing comes back. Anything else to try?
Engine miss on cold start for 20 seconds.
- Thread starter atikovi
- Start date
I'd start with swapping #2 and #3 coils to other cylinders and see if the misfire follows.
I've had problems with cold start misfires on vehicles with clogged up EGR crap/faulty EGR valves but that typically also presented itself with occasional jerkiness while driving.
I've had problems with cold start misfires on vehicles with clogged up EGR crap/faulty EGR valves but that typically also presented itself with occasional jerkiness while driving.
May be a leaking fuel injector. Sounds like one or more cylinders is running too rich at cold startup.
Could be a head gasket weap.
Exactly, had the same symptom as Atikovi. My headgasket finally let go about four months after the symptom showed up.
You can send the injectors to Trav and have them rebuilt. He will probably know if those particular injectors have issues.
I’ve had a vacuum leak caused by intake manifold gasket do this as well. Wouldn't throw a misfire code unless it was below 50 degrees F outside. Misfires require lots of troubleshooting, it could be one thing or multiple things.
I've also seen this due to head gasket weep.
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