XJ ( X351 ) 2009 - 2019

Running Stock Pulley W/ Tune

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Old 05-29-2016, 08:42 PM
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Default Running Stock Pulley W/ Tune

Whats up everyone,

I am currently running my stock pulley with my ETG tune. Would it be fine to drive spiritedly with this setup? Will the ECU adapt to the stock pulley? Just waiting to have my pulley installed again. The car feels fine under partial throttle, but at around 5000 RPM, it kind of falls off on power so I let off. Any thoughts?

Johncy
 
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Old 05-30-2016, 06:39 AM
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As long as the CEL is not coming on, then you should be fine. If things are getting detrimental to the engine, the CEL should come on.
 
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Old 05-30-2016, 03:53 PM
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Originally Posted by Thermo
As long as the CEL is not coming on, then you should be fine. If things are getting detrimental to the engine, the CEL should come on.
Thanks Thermo! Makes me feel better about driving my car.
 
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Old 06-01-2016, 11:17 PM
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Originally Posted by Johncy2000
Whats up everyone,

I am currently running my stock pulley with my ETG tune. Would it be fine to drive spiritedly with this setup? Will the ECU adapt to the stock pulley? Just waiting to have my pulley installed again. The car feels fine under partial throttle, but at around 5000 RPM, it kind of falls off on power so I let off. Any thoughts?

Johncy
How many miles have you driven since it was installed? The ECU will make adjustments for the tune and also how hard you drive. So use hard it for the next 100 miles or so and see how it feels then.

Also, use dynamic as it tightens up the dampers and makes the throttle more aggressive. And if you really want performance, shift to S mode on the tranny and it will keep revs held higher in auto mode and not shift for you in manual mode.

Enjoy!
 
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Old 06-02-2016, 02:40 PM
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Just took out the car today and I did a pull in 6th gear and a "Restricted Performance indication popped up and the supercharger shut off. I scaned the car and it said bank 1 fuel rail too low or somethin like that. P0089
 
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Old 06-02-2016, 02:41 PM
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I erased the code and the car runs fine now. I think I really need to get that pulley back on my car.
 

Last edited by Johncy2000; 06-02-2016 at 03:26 PM.
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Old 06-02-2016, 03:09 PM
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If the fuel rail is getting too low, that is telling me that your fuel pump is not capable of moving as much fuel as the motor needs. You may need to look into what it would take to get a higher volume fuel pump into the car.
 
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Old 06-02-2016, 03:25 PM
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Maybe the ECU thinks that its running a higher boost pulley with the stock pulley on and is trying to adapt. I dunno
 
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Old 06-02-2016, 03:26 PM
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Maybe ECU Tuning Group can chime in and help.
 
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Old 06-02-2016, 05:41 PM
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When I was looking into an ECU Tune, Jags did indicate that the "file" was different for a tune with a pulley and without a pulley.
 
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Old 06-02-2016, 07:07 PM
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Thanks for the input XJsss! I will not get on it until I have my pulley back on. Hope everything is ok with the motor...
 
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Old 09-10-2016, 10:14 AM
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So I just got a retune from Velocity AP as well reverted back to my stock intake tubes, the car still has a hard time revving under full throttle. I got the P0089 Fuel rail pressure too low again. What do you guys think is going on with my car?

This happened, after the dealer replaced my supercharger. Never had the hesitation with my old blower on the car. I will be calling the dealer to today to try and set up an appointment.

Johncy
 
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