my CEL started Flashing Help please

[kaka10]

Today as i was going to subway lol, my car started to act up i went on first gear no problem i hit second and the car starts shaking and my CEL is flashing i was like WTF this never happend before so i went back home all pissed with out eating.

i need your advise please if anyone knows what it could be, thanks in advanced

[B5A4Kevin]

Sounds like a hard misfire (continuous) caused by a faulty coil pack. get the code checked for which cylinder is misfiring (parts store, vag-com, generic code reader, or dealership). then play musical coils (swap misfiring cylinders ignition coil with another cylinder) and see if the misfire follows the coil. other possibilities are plugs or wires (if v6) or output stages (on older models). also dont rule out possible fuel pump failure, bad gas, or vacuum leaks. let the engine idle and listen for hissing noises. does the mil flash all the time (at idle and in gear) or just when you get on the throttle?

[kaka10]

Sounds like a hard misfire (continuous) caused by a faulty coil pack. get the code checked for which cylinder is misfiring (parts store, vag-com, generic code reader, or dealership). then play musical coils (swap misfiring cylinders ignition coil with another cylinder) and see if the misfire follows the coil. other possibilities are plugs or wires (if v6) or output stages (on older models). also dont rule out possible fuel pump failure, bad gas, or vacuum leaks. let the engine idle and listen for hissing noises. does the mil flash all the time (at idle and in gear) or just when you get on the throttle?

it starts right after i turn the car on, it flashes then it stays on

i turned it off and then turn it on again than it starts flashing again i hope is just a CP, should i go to the stealer or does autozone has them?? oh and i got 1.8T sorry for not saying

Can auto zone get me the codes??

[FourRings80]

Coil pack failure, It's common don't worry easy fix and cost $30! If you have acces to vag-com, check for codes and it will tell you in which cylinder the misfire is happening. If not you can unplug the coil pack and see if the idle gets worse. When you find the bad one the idle will stay the same. 99% of the time the coil pack on cylinder 3 is the first to fail. Cylinder 1 is the closest to the bumper and cylinder 4 is closest to the firewall.

Here's a DIY ( for the B6) so not exactly the same but you get the picture. Good luck and hopes it helps :

http://forums.audiworld.com/a4gen2/msgs/1003672.phtml

[kaka10]

Coil pack failure, It's common don't worry easy fix and cost $30! If you have acces to vag-com, check for codes and it will tell you in which cylinder the misfire is happening. If not you can unplug the coil pack and see if the idle gets worse. When you find the bad one the idle will stay the same. 99% of the time the coil pack on cylinder 3 is the first to fail. Cylinder 1 is the closest to the bumper and cylinder 4 is closest to the firewall.

Here's a DIY ( for the B6) so not exactly the same but you get the picture. Good luck and hopes it helps :

http://forums.audiworld.com/a4gen2/msgs/1003672.phtml

yea i hope is the CP i dont wanna get broke lol, but yea it shakes a lot when i go into gears and when im in nutral it idles a lil.

[t1demont1]

coil pack or plugs for sure, what year are you? it could also be an icm failure

[Seerlah]

For the 4th person confirming, it is one or more of your ignition coils. If not the coil, it would be the spark plug. No need to go to the stealership. Diagnose and fix it yourself. Get your car scanned. You don't need to use a VAG com as it is not an intermittent code, so no need to try and get your hands on one if you can not. You could use any generic OBD scanner such as ones found at Autozone. They rent them out for free with a deposit and will grant you the deposit back upon return of thier scan tool.

After you get the scan tool, scan your vehicle, write down the codes the OBD reader pulls, clear all codes, and look up the codes the scanner gave you on here to see which cylinders is misfiring. You may also pull other codes related to the misfiring issue, but will disapear once you replace what is causing the misfire (either ignition coil or spark plug). Once you determine which cylinder is misfiring (from pulling the codes and looking up what the codes mean on the link provided), swap the coils from the cylinder which is misfiring to one that is not. You will get misfires again. If the misfire follows where you the coil from the cylinder which was misfiring, you have a bad coil.

If the misfire stays in the same cylinder after the swap, then it is more than likely your spark plug. Do the same swap as you previously have done with the ignition coils. But instead, this time do it with the spark plugs. Same procedure as the former, and replace as necessary (replace all plugs if it is the plugs and only the faulty ignition coil will need replacement if it is the cause. which more than likely is).

If the spark plugs or ignition coils is not the problem, then maybe another can chimme in to grant better advice.

[kaka10]

If the spark plugs or ignition coils is not the problem, then maybe another can chimme in to grant better advice.[/QUOTE]


thanks guys for the help and the quick respose tomorrow i get it scaned and get the codes again thanks

[kaka10]

coil pack or plugs for sure, what year are you? it could also be an icm failure

its a 99.5 1.8t

[t1demont1]

alright well it could only be one of three things

icm
coilpack
sparkplug

I would replace all the plugs if you havent in a while. If it still runs like shit, drive it to autozone, have them scan the codes and tell you which cylinder is misfiring. then you can replace the coil pack. If the coilpack doesnt fix it, its the icm.

[Stampy]

I don't think they have autozone in spain. haha

I think its a coilpack

[kaka10]

I don't think they have autozone in spain. haha

I think its a coilpack

jaja they dont lol but im in the states living for a while here, and i have another A4 over there so thats why i bought one here just to get from work and around lol thanks for your quick responses guys

[drunknmunky408]

Today as i was going to subway lol, my car started to act up i went on first gear no problem i hit second and the car starts shaking and my CEL is flashing i was like WTF this never happend before so i went back home all pissed with out eating.

i need your advise please if anyone knows what it could be, thanks in advanced

I had the same problem... last year. Vag com said n75 failure so I did that it wasn't that. Then I changed the coil packs and that didnt work. It turned out to be a bad MAF.

[kaka10]

well turned out i had a missfire on cylinder 3 so i order the coil pack and bought new spark plugs to be sure lol

[kaka10]

YES it was the coilpack, thanks guys for all your help

[Stampy]

Time for that group hug.....

I freaked out when I lost my first coilpack. I was on the highway and towed the shit home. After that I always had a spare in the trunk just in case. I couldn't imagine having that happen on a road trip