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Old 12-01-2011, 12:55 AM   #1
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New guy and P1518 / others

Hello everyone. I am new to the forum, and about to be a new owner of a red '02 SVTF, however, I am not new to the car. My mom got this car back when the SVTs first came out - it was the first one sold in Alabama (how do I find the production number?) and she has been driving it this whole time. Due to a new addition to my family I am trading cars with her - my miata for her focus. Sadly, the SVT is too complicated a car for her... The variable intake system has been broken for years now. I am looking to fix this.

Now, based on my research, P1518 usually means a bad clip and / or control module, and the way to diagnose this is look and see if the clip rotates on start-up. If it doesn't then it's one of those. My clip does rotate... So what does that mean?

Car is also giving P0141 (rear O2 sensor) she has replaced it several times, last time was two weeks ago. What would be causing this to happen repeatedly?

Car is making horrible noises most of the time. Loud vibration. Research leads me to believe it is a bad motor mount. Noise goes away under throttle, comes back at steady cruise, and is worse between shifts. Sound right?

Let me know what you guys think! Thanks!


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Old 12-01-2011, 10:03 AM   #2
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If the intake IMRC does not move when you start the car and the cable is hooked up then more the your IMRC motor is bad

If the CAT is going bad you would get a rear o2 CEL , if you can in your state go to a off road pipe , or if you cant a high flow cat , get a tune and turn off the rear o2

Cant help much with the noise

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Old 12-01-2011, 05:27 PM   #3
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The clip rotates on start-up. About 1/4 a turn, then stays there. Is that right?
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Old 12-01-2011, 06:00 PM   #4
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Yes that puts the intake runners into the long runners for bottom end then as you got WOT it changes to the short runners for top end power so that sounds to be working correctly

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Old 12-01-2011, 11:14 PM   #5
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So that's working... Why would it be throwing the code? Is it possible that something in the intake manifold has broken?

Also, I'll probably be getting a tune from you eventually... What are they running, price wise, these day?
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Old 12-02-2011, 12:26 AM   #6
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Also... How come no one has said "hey, welcome to the forum!" I see plenty of people have looked at this thread, but only Tom comments? What's the deal?
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Old 12-02-2011, 10:39 AM   #7
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Welcome to FF! There I said it.

(how do I find the production number?)
SVTOA will be able to provide your production #.

Now, based on my research, P1518 usually means a bad clip and / or control module, and the way to diagnose this is look and see if the clip rotates on start-up. If it doesn't then it's one of those. My clip does rotate... So what does that mean?
Your IMRC may still need attention. There are a few things that go wrong inside the motor/Circuits. I had the same issue and replaced the unit. (Tousley Ford was by far the cheapest, near $200 compared to near $400 from local dealerships. They are a partner here on FF) I have seen several posts where people have taken the unit apart and done some repairs. If you are inclined, do a search for "IMRC Repair" and it should come up

Car is also giving P0141 (rear O2 sensor) she has replaced it several times, last time was two weeks ago. What would be causing this to happen repeatedly?
Check to see if the O2 was replaced with a Motorcraft one or with an aftermarket one. If aftermarket, I would start with changing to the Motorcraft. I have heard of people having no problems with Bosch...Etc, but I have never gotten them to work correctly for any length of time. Go Motorcraft.(Thinner body, more reliable. other than the heater circuits in them) Also, Check the wiring on the harness, The rear has been known to rub on the axle shaft and Chaff the wires a little.

Car is making horrible noises most of the time. Loud vibration. Research leads me to believe it is a bad motor mount. Noise goes away under throttle, comes back at steady cruise, and is worse between shifts. Sound right?
Not enough info to comment. "Loud Vibration" is curious, is it Loud or Vibration?
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Old 12-02-2011, 11:40 AM   #8
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Car is making horrible noises most of the time. Loud vibration. Research leads me to believe it is a bad motor mount. Noise goes away under throttle, comes back at steady cruise, and is worse between shifts. Sound right?
Not enough info to comment. "Loud Vibration" is curious, is it Loud or Vibration?[/QUOTE]

This could just be the CAT bracket. They tend to corrode and break. It's a two piece bracket and the smaller, cheaper one is usually the cause, but of course it was both on mine. Steve @ Tousley fixed me up! Check it closely, mine was hard to see the crack at first glance.
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Old 12-02-2011, 11:41 AM   #9
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I my self have never seen an aftermarket o2 set a code , if your getting a tune dont change the rear o2 as a tune turns them off ,

xcal3 , full custom tune , FREE tune updates as you add more NA mods is 399.00 and 20.00 for shipping , I also dont charge to look over datalogs and help with any non tune related issues

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Old 12-02-2011, 11:51 AM   #10
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Welcome to FF !

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