Hi,

My S80 ran great prior to having the entire car detailed. I'm thinking that when the engine was blasted with the power washer something must have gotten wet. I know very little about the S80, in fact when I picked the car up from the detatil shop I looked to dry the distributer cap off.....only to find out via the forums that there is no distributor cap.

So, where best to start to eliminate the random misfire due to a power washer gone crazy?

thanks!

 

Spark plug well. Hopefully it is not a older T-6.

 

Yes, it is a 1999 T-6. Is there some other concern because it's a 1999 (other than the fact 1999's are known for many problems)?

I plan on selling it which is why I had it detailed, but now i need to fix the misfires. I'll check the spark plug wells.

Also, the misfire is pointing to the first cyliinder (P0301). Is that drivers side, or passenger side cylinder?

Thanks

 

Passenger side is number one

 

it is probably numerous cylinders, but 1999 was not the best year for this car.

 

Put all new plugs in. Switch the coil and boot from number 1 to another cylinder. If the misfire follows to the other cylinder, replace the coil and boot.

I previously washed a Volvo engine and had a coil go the next day. This is how I found it.

 

Thanks all.

I put all new plugs in, swapped the number one and two coils, and still misfiring. The plugs were old and the gaps were .040 or thereabouts so I'm sure the plugs will help.

Where is the best place to buy one coil pack? Can I go with Bosch, or is the Volvo part the best option?

Appreciate the help, thanks

 

After you changed the number one coil with the number 2, did the misfire move to the number 2 cylinder? If so, the problem is the coil which you switched from the number one cylinder.

If the misfire is still the number 1 plug, the problem is not the coil.

For something such as a coil, aftermarket should be OK. Bosch is a good brand.

I would buy the coil from a local supplier or Volvo dealer as opposed to mail order. The longer you drive it like this the more damage you will do to your catalytic converters.

 

Look at all the hoses. The power washer may have knocked one off. Many things can cause a random missfire. I doubt a power wash damaged a coil or plug. Everything is covered.

The cam sensor plugs in to the right of the throttlebody. Check those connections.

Check all the hoses that connect to the various sensors.

Example, I noticed when I changed my cam sensor recently that I knocked of a small hose to the right of the throttle body.

J

 

The misfire followed my coil swap to the number two cylinder. I purchased a coil from the dealer ($68 US), and the misfire is gone. Engiine runs great, but the check engine light remains. I pulled two codes that point to Bank 2 oxygen sensors. Any advice? I find p0154 on the forums, but no reference to P0158.

thanks

 

Reset them and see if they come back.

 

thanks. I did reset the codes and ran it down the road for a long hot run and the codes came back.

it's that p0158 that has me stumped. any ideas? i started another thread asking if there was a relationship between p0154, and p0158, but no response yet.

thanks again

 

P0158
ECM-2B0A
Rear heated oxygen sensor (HO2S), bank 2
Signal too high. Intermittent fault

P0154
ECM-290A
Front heated oxygen sensor (HO2S), bank 2
Faulty signal. Permanent fault


there probably is a relation there because they are on the same bank, you more than likely need new o2 sensors, difficult on this particular car.