2005 S-type 3.0 75k

I just went about 3 miles. Stopped the car- started and got rough idle- drove home, when I accelerated i got a flashing CEL.

Checked it as soon as I got home and had p0303 and p1313, p1316,. and p0306. I reset CEL drove around a touch and p 0306 has gone away and I have p 0303 still. Yesterday i degreased and washed the engine quite heavily.. . Is it possible I got the coils wet and it is causing an intermittent problem?

Number 3 is in the middle on the manifold side. Can I get that out without moving the manifold?



The fact that the 0306 went away lends me to thinking I got something wet--

any suggestions???.

Should I take the connection off 3 and reseed. Anything else between the coil and the ecm that could cause the problem. It moves in and out of restricted performance. If I idle it at 3000 rpm or 1500 rpm or 4000rpm it seems to run smoothly

Thanks for the help I think my real bottom line question is whether or not I got something in the coil or olug wet and need to let it dry and take it out and dry it.

Tom in Dallas

 

Welp Tom, sounds like you have gotten water between the COPs and the sparkies. Best bet and cheapest is to try to pull coil wires and use compressed air to dry out sparkie wells.

But what do I know..... good luck!

 

I'm with Rick, the first thing I did with mine and before I knew better when I got it was give the engine a wash, luckily not too enthusiastically and the Jag gods were with me!
It's been cleaned but not washed since!

 

Yes, it's possible. Supposed to be sealed but as the cars age I guess the sealing fails.

Flashing means cat damage. Don't keep driving till it's fixed unless you like replacing a cat.

 

You know quite a bit/. I went out and drove it for about an hour on the highways around Dallas and got an improvement to about 85%, Clearly the 2 events are related., Thanks for you help and expertise.

Tom in Dallas

 

I'll wash my Dodge Ram's engine bay in a heartbeat using Gunk engine cleaner spray and my trusty garden hose. But knowing how these Jaguars despise water under the hood, I have never washed them and never will. I clean them using nothing but a little silicone spray on an old rag and a lot of elbow grease. It's a hassle but it keeps the Jaguar throttle bodies and spark plugs happy....

 

Having driven it I am about 85% back to normal and I think I will remove or at least see if #3 is slightly wet today. Something tells me if i wait it out the problem would be gone.

I drove the car last night for about an hour and had it up to 75. At idle in D is will now have an occasional miss- in neutral none. No restricted performance and only when I accelerate more strongly do I feel the little tug and then the CEL will flash, but once I back off it is fine and flashing CEL goes away. When I first started today and it first showed the problem, then it was really shaking. When I sit at a light in neutral and ac on- back to where it should be. Normal speeds without jack rabbiting the car (which I never do anyway) and it is fine. Just those extension of idle and the compressor kicks on or at a certain speed and trying to accelerate more aggressively. Either the degreaser or the water or both got to the electric pack, I am guessing Could I have any permanent damage to the pack or is it just waiting to dry out completely?

Tom in Dallas

 

Warning: flashing = catalyst damage.

 

Thanks- will keep that in mind. Why does the cat fail due to the misfire?

T

 

Just to let you know, I had to do nothing after driving an hour last night. Drove the car this morning and evening- had zero problems jumped into sport shifting and was going up a hill at about 60 when I pushed the passing gear and zip - zero no problem. Ran as high as 125 MPH today- no problem. My doing with over-cleaning and now fine.



Thanks



Tom

 

Pumping too much unburned fuel+air means it burns inside the cat and blasts it apart / melts it.

 

Just for future consideration and prevention. How much or many or long would one have to drive with a flashing CEL (MIL) due to a misfire, ect before damage would occur. Obviously if one drove with it flashing for 50 miles, I am sure damage would occur, but if it were very intermittent during a problem time, what would be the potential for when it might fail on a Jag? (understanding there are many factors to consider)

Thanks

Tom in Dallas

 

At the age of our cars it has to be beyond guessing but doing it at all is risky.