VW mk5 GTI misfire and flashing engine light?

[Clayshooter20]

I am new to the VW/GTI world and have just purchased a 2009 GTI with 85k miles not long ago. Starting yesterday My car began shuttering while accelerating and the engine light would start flashing. If I baby the car it drives fine, but anything past 1/4 throttle and the car begins to (what I believe to be) misfire. The car has Apr stage 2, BSH intake, Forge DV, Apr down-pipe. The coil packs were just replaced, so idk what else to look at. If anyone could help me that would be awesome!

 

[larcic]

sounds like a misfire, get the codes checked asap, autozone for free or buy a cheap obd2 scanner

 

[Joshohol]

Could be a vacuum leak somewhere, could be bad plugs. I wouldnt drive it with the light flashing. Also autopart store coiloacks dont like tunes. Oem or bust

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[5aprilc]

Could be a vacuum leak somewhere, could be bad plugs. I wouldnt drive it with the light flashing. Also autopart store coiloacks dont like tunes. Oem or bust

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X2 on this one. Make sure you have the red top coil packs, Ecstuning.com is selling them for $83 bucks.
https://www.ecstuning.com/b-nfis-original-equipment-parts/coil-pack-set-of-four/06e898001/

 

[Clayshooter20]

I've also heard about the cam follower being a problem on these cars, I don't know that it has ever been replaced on this car. Could that be a possible cause of this?

 

[Joshohol]

Yours is an 09 which is TSI, they have other problems. My 2010 with 78k miles already went through a turbo, pcv, rear main seal. All of those go bad on the tsi. Plus the timing chain tensioner.

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[Clayshooter20]

Ok, I'll check the coil packs and plugs this evening. What should I be looking for when checking the coil packs?

 

[Joshohol]

The packs just go bad if you are tuned. I put new plugs and r8 packs from a parts store in (non oem) two of the packs went bad in a week of apr tune with less than 1000 miles on them. Check the code an see which code comes up. If its a particular cylinder misfiring thnmen take that coilpack abd move it to another cylinder an see if the misfire follows

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[GTI's]

Ok, I'll check the coil packs and plugs this evening. What should I be looking for when checking the coil packs?

Scan the car first to find what codes you have and what cylinders are misfiring, unless you get want to change them all and hope it fixes the issue.

 

[larcic]

you cant solve a check engine light without scanning the code

 

[Clayshooter20]

Just got the code scanned. Misfire in cylinder 1. I moved the coil to a different cylinder and the misfire followed. Looks like I'll be upgrading to the red r8 coils

 

[GTI's]

Save your money on the red coils unless you want to dress up your engine or you find them cheaper priced than the OEMs.

 

[clownish]

Save your money on the red coils unless you want to dress up your engine or you find them cheaper priced than the OEMs.

Totally disagree. Real r8 coilpacks have a proven stronger spark that has been shown via extensive experimentation and measurement to stop misfires.


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[GTI's]

So what is the voltage output of the red tops, 20k, 30k, 40k. Please point me in the right direction.

 

[clownish]

Talked to these guys a bit. http://www.hstuning.com/blog/project-cars/r8-ignition-coil-packs/


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