Long time lurker - first time poster.

First off this is a great forum and it has saved me thousands in repairs by pointing me in the right direction over the years.

I have a hopefully straight forward problem. Over the past week I have had the restricted performance light come on 3 times and each cleared after 60 seconds or so. All occured while driving to/from work after the engine was hot and after about 8-10 miles of driving.

1st: Code P0351. Got the restricted performance at stop light at idle. Engine was a little rough, cleared before the light turned green.

** Went home cleared codes.

2nd: Code P0351, P0301, P1313. Occured after a stop while driving, engine was a little rough but cleared before next stop (60 seconds).

** I pulled the cover, checked plugs (1, 3) swapped coils. cleared codes

3rd: Code P0352 while driving to work cleared after 30-45 seconds.

Other facts:
1. Live in Miami so weather is always warm
2. I changed plugs 3500 miles ago and cleaned MAF
3. When I pulled the Nr1 and 3 plug, they seems a little too covered in carbon.
4. I switched the Nr1 and 3 coils to see if the problem would follow. I expected to get either another P0301 or a p0303 with the P0351 NOT the P0352 (which is the other bank).

any thoughts

 

P352 is from second cylinder misfire in bank one (right side looking forward); 301/351 is first cylinder. Misfire is causing raw fuel to dump to the catalytic converter (P1313 showing). I would pull the coils, clean their contacts, and check the plug well for oil (I am guessing it is oil in the plug wells on the right bank).

I am also a fan of dumping a can of fuel system cleaner in a tank of gas to clean up the injectors: spurting instead of spraying will also cause a misfire.

What is the status of your secondary tensioners? Upgraded?

 

Thanks - so since I switch the 2 forward right side coils the codes indicated that the fault moved with the coil? Seems like it is a bad coil? When you say "plug well" are you refering to where the coil actually plug into the spark plug? That is dry - no oil. Spark plug contacts had a little oil resudue on them and some carbon.

Tensioners were replaced several years ago.

 

Yep, sounds like a bad coil. Except -- you said you swapped coils between 1 and 3. For this car, the cylinders are numbered 1 through 4 on the right bank, then five through eight on the left bank. If, in fact you traded coils between the first cylinder on the right bank with the second on the right bank, then it is most likely a bad coil (now on cylinder two). That would explain the migration from P0351 to P0352. Try cleaning the contacts . . .

Over in the XK section look for a problem with misfires on cylinders 1, 2, 3, and 4. He fixed it by cleaning the coils (I was positive, and wrong, that he skipped on his secondary chain . . . ).

 

Hi hoober,

Welcome to the Jaguar Forums!

I see that you've added your Jaguars to your signature line. Excellent! And since you've posted your questions in the X308, I'm assuming you are experiencing these issues with your 2000 XJ8 and not your 2006. Is that correct? It's always a good idea to specify so others don't waste time giving replies about the wrong car.

The term "plug well" that Jim used refers to the cylindrical recess in the cylinder head in which the spark plug is mounted. Oil in a plug well is usually due to failure of the cam cover "spark plug boss seals" that seal the plug wells, either Part 3 or Part 16 in the diagram below, depending on the VIN of your car:





You will also want to replace the main cam cover gasket, Part 2 or Part 15.

The diagram is from jaguarclassicparts.com, the parts service of the Jaguar Daimler Heritage Trust. The diagrams at this website are very helpful in understanding your car. You can also download the Jaguar Electronic Parts Catalog (EPC) and install it on your computer so you can view the parts diagrams even when you're not online. See the instructions at this thread:

https://www.jaguarforums.com/forum/x...uctions-48194/


It does sound as though you have a bad coil or dirty contacts on the coil. I don't know if you're using the Jaguar specific code definitions or generic OBDII definitions found online. You can view and download the Jaguar DTC summaries and possible causes for the 2000 MY here:

http://www.mediafire.com/view/718364...7_ECM_2000.pdf


The 2000 XJ Electrical Guide can be downloaded here:

http://www.jagrepair.com/images/Auto.../jagxj2000.pdf


The link for the X308 Workshop Manual went down last year. If you don't have the manual, send my your email address in a private message with "X308 Workshop Manual" in the subject line to remind me what you need and I'll email it to you in .pdf format.

Also, since we're a friendly group, please visit the New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum and post an introduction so we can give you a proper welcome and learn something about you and your Jaguars.

Cheers,

Don

 

Had the same problem, replaced 2 coils, problem fixed.

 

Thanks all.

Don B - you are correct it is for my 2000 XJ8, I'll ensure I post that next time. I did get the codes from a auto zone reader. I will file the actual code definitions you provided for future reference.

Jhartz - You are correct. I had the wrong code definition, but I actually swapped the Nr 1 and Nr 2 on the right side. Which would lead to a bad coil. I will check and clean contacts, then research the parts.

Any suggestions on where to get the coil? I know that these parts are VIN specific sometimes. I could go to the dealer, but they are a pretty good drive from where I live.

Second - I replaced the plugs 3500 miles ago - would that impact the coils. I went to auto zone and had them look up the specs and installed. The car ran great when replaced - just curious.

 

Try Auto Zone, they provided help in getting the codes read. Any of the suppliers frequently mentioned here can provide ignition coils: Welsh, Motorcars Ltd, SNG Barrett, PartsGeek, Gaudin Jaguar. I like using eBay and Amazon.com -- both give range of choices. Amazon is showing prices from $38 to $158, with ~$68 most frequent. Maybe someone will pop up with a brand suggestion that has proven reliable. Knocking on wood, mine have never needed replacement on any car I have owned.

 

update: OK I pull the coil and cleaned it (although it was pretty clean). Drove for 15 minutes - same problem. P0302, P0352, P1313.

Next step is coil replacement. Advanced auto has avail for $130 - ouch. Checked ebay and Amazon several option including used denso.

Has anyone had luck with used denso coils? They are going for $20-$25. or should I go with new aftermarket and if so what brand? Interested in experiences.

thanks

 

DENSO is the OEM engine management component supplier.

Rock Auto has aftermarket parts or one of the venders on this forum has the OEM

BECK/ARNLEY Part # 1788363

STANDARD MOTOR PRODUCTS Part # UF415

You need the 4 pin on-plug coils.

bob gauff

 

I bought two used coils on ebay, and carry them for spares when I travel.

 

A quick update.

I ordered 2 used coils and replaced the one that was bad. The Jag ran fine no more restricted performance. Then about 2 weeks later I got the restricted performance light again. Checked the codes and this time got P0172 and P0175 (confirmed). THe light cleared after 10 minutes. So now I need to troubleshoot those faults.

 

My rrsc used to get 172 & 175 codes intermittently: usually cleared after running a can of fuel system cleaner through a tank.

Cleaned the MAF, throttle, air cleaner recently? Check for air leaks. Status of secondary tensioners?

 

I can run fuel cleaner through the tank - will do that next.

However, I read on this forum that the pins on the MAF may not be making good contacts. Since I've disconnected the MAF a dozen + times in the past few weeks to T/S the other problem I figured I may have loosen up the connection. I cleaned the MAF and bent the connector pins to make a tighter connection. The jag stumbled and I got the restricted performance again - drove it a few miles and it cleared....then I cleared all the codes. So now we wait and see.

Jim: BTW got orders to Norfolk for what might be my twilight tour - have a house in VA beach I'm going back too.