2000 Honda Accord Loss of power after sitting.

Hi Lamar56,

Thank you for the donation.

Is the Check Engine Light indicating?

Have you ever tried to retrieve for trouble codes?

From the symptoms described, it could either be the ignition coils, spark plugs or fuel pressure. Get them checked first.

Check the spark plugs and let me know if they are sooty or not.

Do you need to crank the engine for prolonged periods when starting from cold?

Without any codes it is never easy to trouble shoot such problems.

The best way to go about is to use a scanner to read the data while the problem is occurring and try to find out which component is working out of specs.

Not every scanner can do it. You must have a scanner that is capable of capturing the freeze frame data and since no codes are triggerred, you would have to capture the data while the problem is occurring and then you can read through the data to check which is not within specs or maybe at the exreme of specs.

For such symptoms, the items that you should pay attention to would be the O2 sensors operations.

PC based scanners would be a better option than others as the program can be updated and it can be programmed for the various OBD II standards.

Problem would be to get the updats and it is more costly than normal scanners.

Yes, lack of coolant can cause the IAC to work erratically but it is surprising that it would cause power loss.

Since problem has not resurfaced it should be ok and glad that you have managed to fix it.

Have a nice day.