Hi, thanks in advance for your time,
I recently let my idiot friend take my car out for a ride. He decided to redline every gear before i had to take over.

Before he drove it, my check engine light was on and giving me a secondary air pump code. I thought nothing of it. People on here said it was no big deal and "if you can hear it when the car turns on, you know it works." So i decided to save the money and time.

After he drove it. The car immediately started misfiring and running heavy. I took it to an advanced auto parts to get the codes read. I got 3.
p04921 and 920 (secondary air pumps 1 and 2)
and the p03000 saying every cylinder except for number 4 was mis firing.

I checked the seals around the secondary pumps (on the front of the engine block, two solinoids with a 4 inch hose connecting them if I am not mistaken) and I do not notice a leak or loss of suction. I have not gotten a smoke test, but I looked all over and can not hear or see any damaged tubes.

I also took out each coil and plug and the plugs are in bad shape but some of the ignition coils actually look functional.

I drove the car home and ordered the parts. The car was shaking vigoursly and I am scared to death to try again.

Now i am not a master mechanic but it seems a little far-fetched that my car could actually work on one good cylinder.

So I ordered all 6 coils, new plugs, and a new air filter.

So here is the question - before I install the coils, is there any thing else that could be causing this to misfire that badly???

Thanks again for taking the time to read this...

 

btw, the most important part -

the car is a later model 2003 audi a6 2.7t - the reason I say later model is because the coils that were originally ordered were for the 03 but they were wrong so I got the 04 ignition coils and they fit.

 

quick update - replaced two of the coils n 4 plugs. Still waiting for other four coils to come in. The check engine light is still on, but has stopped blinking. I drove it about 20 miles to get the rest of the parts just to find out they were not in yet

Either way, the car drove halfway decent, I tried to shift before it even got over 2500 rpm in each gear but there was no shaking.