Intro - I NEED HELP!
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Intro - I NEED HELP!
I recently bought a 1990 jaguar xj40 4.0 with a problem, it stalls, and has a rough idle from time to time.
the previous owner changed the fuel filter and fuel pump.
I have fixed the MAF sensor which was not working, i also fixed the fuel injectors that were leaking, and changed the spark plugs.
so far nothing has changed, the car works great for a period and then just goes rough and drops in rpm, has a hard time recovering and sometimes just stalls.
there is no check engine light.
what should I do?
the previous owner changed the fuel filter and fuel pump.
I have fixed the MAF sensor which was not working, i also fixed the fuel injectors that were leaking, and changed the spark plugs.
so far nothing has changed, the car works great for a period and then just goes rough and drops in rpm, has a hard time recovering and sometimes just stalls.
there is no check engine light.
what should I do?
Joined: Oct 2007
Posts: 121,078
Likes: 6,652
From: PHX some of the time
Welcome to Jaguar Forums Jaguar xj40 1990 4.0,
Good to have you with us.
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Good to have you with us.
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Veteran Member
Joined: Mar 2014
Posts: 26,763
Likes: 10,311
From: Tehama County, California, USA
Hello,
Congratulations on your new Jaguar Xj-40!
I'm sorry it's giving you fits already. If you haven't already found your way there, someone will be along shortly to direct you to our Xj-40 section where other members will be able to help you.
Welcome to the forums from ElinorB.
(';')
Congratulations on your new Jaguar Xj-40!
I'm sorry it's giving you fits already. If you haven't already found your way there, someone will be along shortly to direct you to our Xj-40 section where other members will be able to help you.
Welcome to the forums from ElinorB.
(';')
Joined: Dec 2011
Posts: 120,439
Likes: 17,009
From: Durham, UK
Welcome to the forums Jaguar xj40 1990 4.0,
My first thought is CPS (Crankshaft Position Sensor) but I'll leave it to other members with current or considerably more recent experience of this model than myself.
I can see you've already found your way to the XJ40 forum so there's no need for a link to it from me. The 'HOW TO' thread at the top is a good place to start for information on regular issues. You can also use the Europe Region forum by following this link https://www.jaguarforums.com/forum/europe-42/ to find other members in your region.
Please read the guidance for new members ( https://www.jaguarforums.com/forum/n...ned-up-241802/ ) which answers many of the most frequent questions about getting started.
Enjoy the forums.
Graham
My first thought is CPS (Crankshaft Position Sensor) but I'll leave it to other members with current or considerably more recent experience of this model than myself.
I can see you've already found your way to the XJ40 forum so there's no need for a link to it from me. The 'HOW TO' thread at the top is a good place to start for information on regular issues. You can also use the Europe Region forum by following this link https://www.jaguarforums.com/forum/europe-42/ to find other members in your region.
Please read the guidance for new members ( https://www.jaguarforums.com/forum/n...ned-up-241802/ ) which answers many of the most frequent questions about getting started.
Enjoy the forums.
Graham
Senior Member
Joined: Dec 2021
Posts: 195
Likes: 24
From: austin
I recently bought a 1990 jaguar xj40 4.0 with a problem, it stalls, and has a rough idle from time to time.
the previous owner changed the fuel filter and fuel pump.
I have fixed the MAF sensor which was not working, i also fixed the fuel injectors that snaptube vidmate were leaking, and changed the spark plugs.
so far nothing has changed, the car works great for a period and then just goes rough and drops in rpm, has a hard time recovering and sometimes just stalls.
there is no check engine light.
what should I do?
the previous owner changed the fuel filter and fuel pump.
I have fixed the MAF sensor which was not working, i also fixed the fuel injectors that snaptube vidmate were leaking, and changed the spark plugs.
so far nothing has changed, the car works great for a period and then just goes rough and drops in rpm, has a hard time recovering and sometimes just stalls.
there is no check engine light.
what should I do?
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