Car is a 2004 Audi a4 1.8t fwd 4cyl.. 89200 miles.
Just had a timing belt (tensioner and idler included) change along with serpentine belt, water pump, thermostat, coolant temperature sensor, coolant housing flange, coolant flush, alignment, oil and filter change (0W-40 Mobil 1 full synthetic) change ... I fill up 93 gas and yesterday I put in a fuel injector cleaner when I filled up my tank.
Oh and also I changed one of the ignition coils which I had in reserve just in case one let out on me on the road like it did before on i95, and I also changed out my spark plugs and put in brand new ngk pfr6q gappd (which was in there before they just looked beat up) .. and another thing to mention when I pulled my coils out to do the spark plug change I noticed there was a tiny bit of oil on each coil, I called Audi dealer and they said its common just wipe off the oil from the coils and plugs housing, which I did.

So this morning, it was a little chillier then usual 61f ..I live in Florida and we have a cold front .. OK onto to the problem

This morning I go to start my car..and I always let it idle for about five minutes, and a couple of seconds into idling the engine starts shaking and the cel starts flashing .. right away I thought "damn there goes an ignition coil " because I had the same symptoms before and it was an ignition coil which is an easy fix .. but after maybe ten seconds of engine shaking and cel flashing it all stopped and everything went back to normal!!

The temperature gauge went half way and I drove and everything was fine..

Given all the information and services I have done to the car in the past week ... can anyone tell me if these are beginning symptoms of a ignition coil giving out or a plug or what??

Or is it just that all the new parts aren't used to the cold temperature so they were getting warmed up?

I'll keep y'all posted if this weird misfire happens again or if a coil actually goes out soon.

Any help /suggestions would help! Thanks

 

You live and Florida and let your car idle for 5 minutes every morning?! LoL, that's a big waste of gas, my friend. I can see if you lived where I live in the great white north, but Florida?

Anyway, I was going to say coil pack or possibly the coolant temperature sensor. But since you replaced the CTS it's probably not that(unless it was not installed properly, or you got a bad one from the parts store).

Assuming you installed all the plugs correctly and tightened them to specs, it could be one of the other coil packs that you didn't replace that may be the issue.

Can you pull the codes with VAG-COM?

 

One thing to possibly look into, is the fuel. I had a few weird hesitations and start ups, I always runs 93 octane as well. Well being broke before my paycheck, I put 87octane in the car and to my surprise, the car ran better and then some. I've been running 87 the past 3 weeks and my average MPG went up by 5mpg along with smoother starts and cruising speeds. Definitely something to think about, possibly got some bad gas, or the injector cleaner is making the car act up.

 

I will check the plugs today if they are nice and tight. The car is driving normal now. And the cel went off so there are no codes to pull..

87? I thought 93 was a Tad bit better to use for turbocharged engines?