Engine light flashing when accelerating it showed a p301 code I changed plugs and number one coil with new coil its still showing the p301 code and engine light still flashing it feels like its missing a little bit but not real bad I put it in 4 w/d and the light doesn't flash as quick as it does in 2 w/d but under heavy accelerating it will still flash. A couple months ago I had a p302 code changed plugs and #2 coil and it was fine till this problem happened.
The flashing light means the problem is serious enough to damage the catalytic converter.
The code means cylinder 1 is not producing power. So it could be fuel, compression, or ignition related.
SOURCE: 2000 VW Jetta VR6 My
You may have a bad coil pack - try moving two of them around and see if the misfire follows the coil pack or stays at the same cylinder. If it follows the coil pack, get a new one. If it stays in the same cylinder, inspect your spark plug wires and make sure the plug is gapped correctly.
SOURCE: "check engine light flashing"
The flashing check engine light is typical of a misfire issue. There are two things I would do to start with.
1. Take the vehicle to an auto parts store like Autozone and have them hook up their scan tool so that they can retrieve stored trouble codes. Even if the check engine light is not on, they should be able to retrieve recently stored codes.
2. Do a complete tune up. New plugs, new plug wires, new air filter, new fuel filter if it has not been done recently.
If the parts store pulls the codes and they cannot tell you what they mean, post them up here and I will see what I can dig up for you.
SOURCE: Check engine light flashes sometimes and runs rough
A flashing check engine light is a critical indicator. That usually means that something went wrong that will damage the emission control system... and that is usually an ignition issue. First off, the OEM plug your car calls for is an NGK irridium... NOT BOSCH and not anything with more than 1 prong. Those NGKs are like 2 bucks and they are the proper plug. Make sure you have these plugs and make sure they are gapped to .028. Next, my suggestion is put all the new stuff on again. Drive it to autozone and have them delete all the codes. Drive it around until the check engine light comes on again, then immediately go back and read the codes. The ECU is smart enough to know which cylinder is misfiring. On these cars, I think they have three banks of two... meaning one "coil" inside the coil pack operates two of the cylinders. So if you get multiple misfires, it's the coil. If you get one misfire it's probably an individual plug wire or plug. Good luck.
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