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Ecu Failure when at running temp.

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Old 08-14-2019, 09:18 PM
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Default Ecu Failure when at running temp.

After a ridiculous amount of troubleshooting, replacing parts, and countless troubled days I've come to the conclussion that my idle issues and engine stalls at normal operating temperature are happening due to a faulty ECU
I HAVE A 96'JAGUAR VANDEN PLAS 4.0

It runs insanely smooth and nice when you first start it up and for the first 20 mins of driving. After that it stalls out. Ive done the fuel pump replacement and tank cleaning and fuel filter. Ive replaced my IACV , Cam sensor , 4x O2 sensors,Egr valve , all my vacuum lines, cleaned my throttle body ,coils and plugs ect.

STILL RUNNING GOOD AT START UP AND BAD AFTER WARMING UP. HELP!
 
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Old 08-14-2019, 11:24 PM
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Hello, Brandon,
I'm sorry your kitty is giving you fits. Someone will be along soon to direct you to the correct section where you can get help for whatever ails it.

Welcome to the forums from ElinorB.
(';')
 
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Old 08-14-2019, 11:29 PM
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Welcome to the Forums.

The XJ6 (X300) TechSection will have answers.

BUT

My 3,2ltr X300 did similar, and being accustomed to my V12 cars also going hissy when warmed up, I replaced the CTS (Coolant Temp Sensor), as in the one with 2 wires for the ECU, and problem solved.

Good luck.
 
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Old 08-14-2019, 11:40 PM
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Welcome aboard Brandon.
 
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Old 08-15-2019, 03:22 AM
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Welcome to the forums Brandon,

Good to have you with us.

I hope it isn't a faulty ECU. Follow this link https://www.jaguarforums.com/forum/xj-xj6-xjr6-x300-26/ to the X300 forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for information on regular issues.

Please add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

You can also use the US Western Region forum by following this link https://www.jaguarforums.com/forum/us-western-38/ to find other members in your region.

Enjoy the forums.

Graham
 
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Old 08-15-2019, 06:50 AM
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Welcome to Jaguar Forums Brandon,

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
 
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Old 08-15-2019, 07:16 AM
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welcome to the forum - enjoy!!
 
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Old 08-15-2019, 05:26 PM
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Welcome to the forums.
 
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Old 08-16-2019, 11:10 AM
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Originally Posted by Grant Francis
Welcome to the Forums.

The XJ6 (X300) TechSection will have answers.

BUT

My 3,2ltr X300 did similar, and being accustomed to my V12 cars also going hissy when warmed up, I replaced the CTS (Coolant Temp Sensor), as in the one with 2 wires for the ECU, and problem solved.

Good luck.
So this morning I took your advice, said to HLL with it, threw in a new CTS and nothing changed . I also found the ECU I was looking for and ordered it yesterday as well. Im having some real frustrated days with this.ibe checked everything to my knowledge, worst part is im not getting codes or anything. Just the Transmission Mil Fault code when it stalls.
This CAR RUNS AMAZING BEFORE IT WARMS UP. This is so frustrating! Any other ideas?
 
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Old 08-16-2019, 12:08 PM
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I recommend you take the question to X300 forum. Many members read the Intro's and several reply but few then return to read them again.

Graham
 
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Old 08-16-2019, 12:12 PM
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Originally Posted by GGG
I recommend you take the question to X300 forum. Many members read the Intro's and several reply but few then return to read them again.

Graham
I already have.
 
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