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blinking check engine light

golfgti_tr

golfgti_tr

Ready to race!
Today while I was cruising, check engine light flashed couple of seconds and disappeared. I did not feel anything strange with my car.
Do you have any idea what went wrong?
Thanks.
 
R

RGTI13

Go Kart Champion
Normally flashing CELs are misfires. Check coils and plugs. Could be time to swap either.
 
artur1292

artur1292

Go Kart Champion
Misfire. Blinking check engine light means the engine is misfiring. Like stated above it might be time to switch out your plus and or coil packs. One way to check is to pull the coil packs out one or more might have some discoloration on them which will indicate the coil pack and or spark plug going out.
 
R

RGTI13

Go Kart Champion
Also, make sure the coilpacks are properly seated. Take your engine shroud off and press down on each.
 
2

2inventmore

New member
I have been chasing the flashing CEL for a couple of weeks. Earler this year I replaced the timing belt, thermostat, water pump, oil pump, coil pack, wires, serpentine belt, alternator, valve cover gaskets, and a ton of vaccum tubing. Car ran great until this new CEL. According to repeated crap scans, the #3 cylinder was missing, the cam shaft sensor was faulty or most likely the coil pack was bad. I checked out the plug wire by swapping them around and it isn't bad, replaced the spark plug. No change, so I replaced the coil pack, and cam sensor and still no change. The darned CEL still flashes but not under acceleration load. I have done the water spray looking for a short and the propane test looking for a vacuum leak...no change.
I need to find a VAG-Com in the Akron Ohio area or some one who has an idea of what it could possibly be. It's a 2000 Audi A6 2.8l with 199,000 miles, but normally runs great.
Any suggestions?
Thanks
 
R

RGTI13

Go Kart Champion
2inventmore said:
I have been chasing the flashing CEL for a couple of weeks. Earler this year I replaced the timing belt, thermostat, water pump, oil pump, coil pack, wires, serpentine belt, alternator, valve cover gaskets, and a ton of vaccum tubing. Car ran great until this new CEL. According to repeated crap scans, the #3 cylinder was missing, the cam shaft sensor was faulty or most likely the coil pack was bad. I checked out the plug wire by swapping them around and it isn't bad, replaced the spark plug. No change, so I replaced the coil pack, and cam sensor and still no change. The darned CEL still flashes but not under acceleration load. I have done the water spray looking for a short and the propane test looking for a vacuum leak...no change.
I need to find a VAG-Com in the Akron Ohio area or some one who has an idea of what it could possibly be. It's a 2000 Audi A6 2.8l with 199,000 miles, but normally runs great.
Any suggestions?
Thanks
Click to expand...

200,000 miles. There's an electrical short somewhere. If your CEL is flashing under zero load but not under load, I would assume it's erroneous.
 
golfgti_tr

golfgti_tr

Ready to race!
Trnado_2.5 said:
Misfire. Blinking check engine light means the engine is misfiring. Like stated above it might be time to switch out your plus and or coil packs. One way to check is to pull the coil packs out one or more might have some discoloration on them which will indicate the coil pack and or spark plug going out.
Click to expand...


Lately I replaced the spark plugs. I will ckeck tomorrow if the coil packs are seated properly.
 
M

mk6'12gti

Drag Racing Champion
2inventmore said:
Thanks, I'll keep hunting. Anyone with a VAG-Com unit near Akron OH
Click to expand...

your best bet if you want to take a lil drive .. go to HS tuning theyll fix it all up for you
 
golfgti_tr

golfgti_tr

Ready to race!
Update:
Today I was at the dealer, they found a misfire in cylinder 2, checked the coil packs, plugs.. they also performed a compression test. all were ok. in the end they told me injector, which is 300 dollar. what do you think it? injection problems are common with GTIs?
when the cell was blinking, I did not feel anything wrong with the car, it blinked around 10 seconds and disappeared. Everything runs ok.
Another thing, last 2-3 months, during cold start, sometimes I feel a small vibration in idle just for a short period at 1200 rpm till it goes down 700. and little hesitation when I start driving again for a short period.
 
R

RGTI13

Go Kart Champion
golfgti_TR said:
Update:
Today I was at the dealer, they found a misfire in cylinder 2, checked the coil packs, plugs.. they also performed a compression test. all were ok. in the end they told me injector, which is 300 dollar. what do you think it? injection problems are common with GTIs?
when the cell was blinking, I did not feel anything wrong with the car, it blinked around 10 seconds and disappeared. Everything runs ok.
Another thing, last 2-3 months, during cold start, sometimes I feel a small vibration in idle just for a short period at 1200 rpm till it goes down 700. and little hesitation when I start driving again for a short period.
Click to expand...

That's a possibility for sure. Ask the dealership if it's still under TSB or extended warranty. I believe injectors on certain model years are warrantied.
 
B

blingdub

Go Kart Newbie
i had CELs a while back, and the mechanic replaced the coil packs, spark plugs, did compression tests, and still didn't make the CEL go away. they said the only way to find out was to look at the injectors. i told them to go ahead, and when they got there the injectors were clogged up with carbon build up. they replaced all 4.

luckily for me, it was covered under the extended warranty and VW sent me a check!
 
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