Loseph

Address 01: Engine
Part No: 4Z7 907 551 S
Component: 2.7L V6/5VT G 0020
Coding: 07755
Shop #: WSC 07117


5 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16690 - Cylinder 6: Misfire Detected
P0306 - 35-00 - -
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
16687 - Cylinder 3: Misfire Detected
P0303 - 35-10 - - - Intermittent
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-10 - - - Intermittent
Readiness: 0000 000

Check engine light flashes.
Car idles like crap then when you get above 35 mph it runs like nothing is the matter but under 35 mph or low RPMS it stutters makes little boost.
If you just accelerate you can almost not tell there is a problem but is under slow acceleration you notice the vibration from the engine.
I replace all my spark plugs on Saturday and it is still misfiring.
Could it be the coil packs?
I read somewhere on here that someone had a similar problem and it was the timing belt had jumped a tooth and caused the car to run like crap at low RPMS. I have not changed my timing belt yet but the car is at 77,000. Any help would awesome. I just want to have a idea of what wrong so i can figure out if i can fix it my self or take it somewhere.
I did search and posted this is the diagnostics forum with no response. Please help.

gragravar

replace the coil packs in #6 & #3

Rally_nutcase_1982

Unplug the MAF and see if the symptoms go away - if so then your MAF might be shot as well....

paulroad

that cyl 3 and 6 are pushed in 100% and the plug is connected 100%.

The first step in diagnosing is to follow the obviouse and look at what you already worked on.

If it was fine before you worked, then something you touched is usually the cause.

If everythgin is connect right, then swap coil pack three with coil pack one and clear the codes.

See how it runs and rescan.

yrk2.7t@curbside

Since it is the rear two cylinders it could be a spider hose leak. These cyls would be affected 1st.

Nappy

installed Bosch Platin plugs. Stock plugs is best.

With 77k, it's also likely coil packs. Carson at riverside (cheter@riversideaudi.com) has coil packs for $24/each. I bought a bunch and I keep 2 in the trunk, just in case.

Loseph

reason that i swapped them out. I also tired to disconnect the Maf and the car just ran worse. I was going to order a couple of coilpacks and try that but i wanted to make sure it wasnt something else first.

Since i was having the problem before i installed the plugs would i need to clear the codes after i installed the plugs for it to run correct again or if i solved the problem would just correct it self?

Thanks everyone for all the advice so far. This car can be such a pain in the *** sometimes.

Nappy

plugs should have showed immediate improvement regardless if you reset the codes.

yrk2.7t@curbside

from say cyl 5 to cyl 6 and see if it follows the coil pack or stays there.

The repeat for the other side swap cyl 2 and cyl 3 coil packs.

You can monitor mis fires in channels 15 and 16 under ECU and then measuring blocks.

Loseph

swapped coil 5 and 6 and 5 misfired right away. Got a new pack and all good! Thanks for the help!