Cylinder misfire solved

I thought I'd start a separate thread so I don't clutter up the other thread.
I took the left front tire and wheel to the shop and had a new tire mounted. Went to the ATM after dark Wed night and hit a curb turning into the drive, instant flat. I put the temp spare on and the TPM light and check engine light was on, made it home. I put the new tire on and drove it to the mailbox, TPM light off, CEL still on. When it warms up today, I'll check the code and see what's going on. The thing I hate the worse is, I scratched the bottom corner of the new bumper cover.

 

Follow up:
It was really cold the night I curbed the tire, I left the car on ready to keep the heater going and noticed that the engine was misfiring, when I got back into the car, of course the TPM light was on and the CEL right beside it was on also. I drove the car again today and several times I noticed the misfiring when cruising, not noticed when under load. I had never had any of this before the jolt from the tire curbing, been too cold here to check anything but anyone got any ideas what this might be and why it started with the bump from the curb? I'll see if I can pull the CEL code.

 

P0301 and P0303, still baffling that it just started with the jolt from hitting the curb. Codes cleared, but I'm sure they'll be back.

 

Another update: I took the car to the shop today and the tech ran a scan with Snap On scanner. The EGR checked good and no sign of coolant leak. We pulled the coil packs to check for carbon tracing and found none. We then pulled the plugs and found the gap was about .055. These are the Denso Iridium, same part # as the original plugs. The gap was so wide because the ground electrode was eroded, no Iridium pad on the ground electrode. The original Denso Iridium plugs with 140,000 miles have the little pad of Iridium on the tip. I put the original plugs back in and all is good. I don't understand why there is a difference in the original and the same brand and part # of the replacement that turned out to be junk. The plugs that replaced the original have about 40,000 miles on them and are garbage. If I had looked closer, I would have noticed they were not double Iridium, just a note to self, Fool me once, shame on ... shame on you. Fool me... You can't get fooled again!

 

You don’t have any fluids leaking onto the ground? NONE

No loose connections in the engine bay? NONE

Notice any difference when turning or steering? NONE

How does it track going down the road? Straight as before.

Check all levels in the engine bay and all are up and none are low? All correct

How many miles are you up to? 181,000

Ever clean the egr circuit through to the intake manifold? Nope.

Consuming any oil? 1qt. in 4600 miles, have done another round of the EPR flush and watching level

 

I noticed the misfiring as I was changing the tire and then saw the CEL when I got back in the car. I think it just started because of the cold weather and wasn't noticeable when driving. The only time it was felt was when idling or no load on the engine. The cold and the flat and the CEL all happening at the same time must have been just a coincidence.

 

I was afraid it would be a costly repair, EGR and cooler or possibly a head gasket

 

Re read my post, I didn't say anything about closing the gap. Where did I say anything about a start up knock?

 

I'm pretty sure I got them from Rock Auto, these are the ones I ordered.
More Information for DENSO 3444

These are the ones I should have ordered.
More Information for DENSO 4711

I put the original Denso plugs back in and they are working just fine.