1999 S80 2.9 non turbo - Drive Slowly Service Urgent

sherry007 · Post by **sherry007** » 07 Jun 2014, 07:59

Mileage: 177000 KM

While Driving following message popped "Drive Slowly Service Urgent" With LAMBADA Sign.

Pull out the codes which are as attached.

No change in drive after this message just Lambada signs blinks few times.

Spark plugs are OK, 3 coils are slightly cracked, not easily detectable.

Fuel injectors seems OK as fuel consumption is normal as before, plus I always fill it up when half 40% fuel left .Fuel Filter is new.

As per codes, I suspect O2 Sensors.

codes taken while car was running.

Will appreciate your advises and suggestions.

Regards

Post by **Oly_850** » 08 Jun 2014, 23:12

P0300 is Random Misfire in which the engine cant tell which cylinder isn't firing, causes include (in the order I'd go hunting in):

- Old worn spark plugs, (or cheap new ones)
- Worn out coil packs, they need to spark bright blue
- Coils for #4 and #5 swapped in the wrong position
- Timing belt off one tooth
- Intake leak
- PVC / Flame Trap clogged up

Let us know what you find?

sherry007 · Post by **sherry007** » 09 Jun 2014, 08:15

Thanks Oly for the reply.

Following are my observations

- Old worn spark plugs, (or cheap new ones)
They are OK.

- Worn out coil packs, they need to spark bright blue
Yes, few of them cracked.

- Coils for #4 and #5 swapped in the wrong position
May I know more about this, what do you mean by swapping the coils, are coils numbered to place in?

- Timing belt off one tooth
6 months ago, Timing belt changed No issue so far, How I can check Timing belt off on tooth????

- Intake leak
Yes I can see few leaks from Intake gasket?

- PVC / Flame Trap clogged up
That is the job i never forget, because I did it myself, it working good, no clogging.

Will appreciate your reply and thanks for the great post about the transmission build.

Regards

Post by **Oly_850** » 09 Jun 2014, 18:58

A couple things to check:

Get a can of carb cleaner, start the car and spray around the intake manifold, all over all the connections back to the airbox. If you have a vacuum leak the engine will 'race' as you pass over it with the spray.

The other bit is the ignition coil packs. They're good for about 125k miles, but they're also $100 each, so I don't recommend just replacing them all. Remove the plug cover and while wearing heavy gloves (and dry clothes please) start the car. Unbolt the coil on the left (#1), lift it up, might be snug and the boots can tend to call apart, but they are not expensive. When you get I up far enough, spark should leap between the tip of the spark plug and the bottom of the coil. The spark should be bright white or blue, not yellow or dull. No spark at all? Swap it with another coil and try again. Taking off a bad coil will often make no difference in the running of the car, but a good one definitely will.

Take care to not plug #4 and #5 in backwards. There is enough slack in the harness to do this, so remember that the connectors on #4 and #5 face in opposite directions.

sherry007 · Post by **sherry007** » 10 Jun 2014, 01:30

Oly, thanks for the professional suggestions. Since I am almost near to 125k Miles, must change the coils now.

By the way Since I got my car's timing belt changed I drove over 5K Miles with no problem, does there might be chance of
"Timing belt off one tooth" problem? Plus what does it actually mean "Timing belt off one tooth"

Thanks