My wife has a 2003 X-type 2.5 with 72,000 miles. Over the last 2 months she has been getting the p0171 & p0174 codes for lean on bank 1 & 2. I have had the care in to a independent British cars service mechanic. He checked all the vacuum hoses and did a smoke test. He could not find any leaks. I changed the air filter and cleaned the MASS sensor with recommended cleaner.

I have noticed the the car has a rough idle when first started in the morning. Sometimes it will show a check engine light and cruise control unavailable message. After the engine has run for about 1 to 2 minutes the idle smooths and the car runs perfect. It has good acceleration and does not hesitate from a quick start from a stop sign.

I asked the mechanic if it could be the IMT gaskets, but he told me that if they were bad, or if it were a vacuum leak, we we probably would be hearing a hiss. The throttle chamber butterfly has not been cleaned yet. Could this be sticking when the engine is first started? Any other suggestions? I am taking the car back to the mechanic in a couple of days and leaving it for a few days to see if he can track down the problem.

Anyone have some suggestions?

 

Whoop whoop whoop his a...well uneducated in the common problem with the xtype. Its 2 8mm bolts in the top imt. Pull it out and inspect the orings, if theyre not green replace them. He could have check those almost as fast as opening the hood. Replace the pcv hose with new style ribbed and heat shrink the brake booster check valve in the middle of the pipe.

 

Welcome to the forum,

Hows that for service, you join the forum and get the answer to your problem in 14 mins.
Don't forget to let us know how it goes.

 

Im sorry I was in the bathroom Norri, I swear I can get better if you just give me another chance

 

Hi and welcome to JF, good to have you here with us .....

sorry to hear about your issues, but, Brutal has spoken with what I'm sure will be the fix for you.
14 mins for a fix??....That has to be some kinda record??

There really are some amazing and friendly guys here....you're in really good company to discuss anything Jag related or even just to have a few laughs!
Any issues just post and the guys here will help you out no problems....

A really great mix of information, camraderrie and fun

I've manually upgraded you to full forum access so you can better view the site and all its features so jump on in and enjoy

 

Maybe 14 seconds, not minutes

 

Thanks Brutal! My mechanic must have already check the IMT "O" rings, as I unbolted the two IMTs this morning as suggested. It took about 5 min. :-) They are the green ones and do not appear to be brittle! I also rechecked all the hoses and carefully checked the brake booster valve.

About three months ago my mechanic replaced the fuel filter. Shortly after that we started to get the occasional check engine light, cruise control unavailable and the p0171 & p0174 code.

I have run about two tanks of gas through the car using fuel system cleaner and the frequency of the problem has decreased. However, every morning when we start the car,or it been sitting for a few days, it idles rough for a few minutes. After that, as I mentioned, it then runs great!

It almost seems that for those first few minutes it is starving for fuel. I do not know enough about the Jaguar engine, but is there some sort of fuel reservoir in the engine compartment that could be draining, and it takes a few minutes to get a clean fuel stream going?

Sorry to be showing my age, and talking about how my old carb equipped cars worked :-) Anyone have any other suggestions?

Mikeda

 

Hi,

This is the welcome area and not meant for tech discussion.
I've copied your last post to the X section and you can follow it there, here's a link
https://www.jaguarforums.com/forum/x...problem-67235/