2000 V70 mk1 Multiple ignition coil failure

elgv70 · Post by **elgv70** » 18 Dec 2014, 14:37

Hi
I didn't find anything on multiple ignition coil errors.
I get ECM 3340,3330,3320 Ignition coil faulty signal and ECM 3200 ignition coil faulty??? there shouldn't be one? I used Icarsoft i906 to pull the codes.
I also have the key stuck, I got the immobilizer communication fault code ecm-720a. maybe need to clean the immobilizer antenna.
The engine runs on idle on all cylinders, but when I press the gas pedal it gets rough. It lacks power driving uphill. Check engine light is on. Then while reading codes I got also the ETS light.
After reset ets is not lit again.
I'm planning to check the ignition coils, maybe switch them around and see if the fault would hit cylinder 1 and 2. Somehow it feels strange to get 3 ignition coils going bad at the same time.
Any advice?

Post by **Ozark Lee** » 18 Dec 2014, 15:57

The distribution is a bit strange. It would make sense if it were cylinder 1 and 2 or cylinders 3, 4 and 5 due to the ground distributions. Coils for cylinders 1 and 2 have a common ground as do the coils for 3, 4, and 5. The two ground lugs are at different places on the cam cover. That said, I would double check both of the ground points.

I have had more than one coil fail very close to each other in time. They all have the same amount of time on them and they all, theoretically, have been exposed to exactly the same conditions. In a way it is like headlight lamps, they too tend to fail at about the same time for both sides of the car.

...Lee

elgv70 · Post by **elgv70** » 19 Dec 2014, 00:26

Thank you, Lee
You might have found the problem!!!!!!

You see, the fault codes are not logical. I didnt tell the cylinders.
In fact it is cyl 3,4,5 as you wrote.
I cannot connect to the ODB2 system.I just got the info that it might be a ground problem.
So I have a lot of reasons to chek ground problems
I also need to check the immobilizer antenna since I got the ECM-720A, it might be oxidated.
BR Sebastian

P1350 ECM-3300 Ignition coil cylinder 1. Signal too low.
P1351 ECM-3300 Ignition coil cylinder 1. Signal too high.
P1352 ECM-3310 Ignition coil cylinder 2. Signal too low.
P1353 ECM-3310 Ignition coil cylinder 2. Signal too high.
P1354 ECM-3320 Ignition coil cylinder 3. Signal too low.
P1355 ECM-3320 Ignition coil cylinder 3. Signal too high.
P1356 ECM-3330 Ignition coil cylinder 4. Signal too low.
P1357 ECM-3330 Ignition coil cylinder 4. Signal too high.
P1358 ECM-3340 Ignition coil cylinder 5. Signal too low.
P1359 ECM-3340 Ignition coil cylinder 5. Signal too high.

Post by **jimmy57** » 19 Dec 2014, 08:40

Use a voltmeter and check between battery pos terminal and the terminal where battery cable goes to the electrical box in engine bay on left side. DO this with engine running and it should be less than 3000 mV (0,3 V).
If this is OK then do a similar test between that same connection in electrical box and one of the green wires at one of the coils. Use a pin or a straightened paper clip and slide it next to the green wire in the back of the connector for coil. The pin or wire should be felt to make contat with the metal terminl so you can get your voltage reading. The voltage should again be less than 300 mV.
If this voltage is high then the relay in that box for engine is suspect. Tap it sharply with screwdriver handle and watch to see if the voltage value changes indicating there is an issue in relay.

Post by **cn90** » 19 Dec 2014, 08:56

How old are your spark plugs?

For the records, I use NGK Iridium BKR6EIX, single-prong Iridium.

Post by **abscate** » 20 Dec 2014, 07:03

Clear all the codes and see if one comes back first.

The first coil failure I experienced was a week after a jump pack start that SWMBO got at school, leaving us stranded downtime in -20F weather. Ugh.

I've noticed that the coil failure codes on OBD are not always reliable indicators, based on reports here.

Cn90 inquiry into spark plug condition may well be the answer here...