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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 09-29-2014, 09:54 PM   #1
zchdrl
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Cutting Out Problems
Car:

S14 with SR swap

Problem:

-Car cuts out at certain rpms
-Cannot drive past 30mph

Things I have done already:

-Changed out MAF and checked wiring
-Checked wiring for O2
-Checked sparkplug gap

Any help is appreciated, thanks ahead
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Old 09-30-2014, 08:06 AM   #2
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Clogged fuel filter maybe?
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Old 09-30-2014, 09:41 AM   #3
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Possibly but with a clogged fuel filter would it idle funny or stumble when driving?
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Old 09-30-2014, 09:45 AM   #4
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Quote:
Originally Posted by zchdrl View Post
Possibly but with a clogged fuel filter would it idle funny or stumble when driving?
Yes! Or ur fuel regulater can b fualty or like me i had my fuel lines routed wrong which caused it to barely idle and i couldnt even accelerate the car

One tip ive heard is to spray some "maf cleaner or brake cleaner " in the intake system NOT directly at your maf, and if the idle rises and stays smooth for a bit then its fuel related.
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Old 09-30-2014, 01:40 PM   #5
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The car idles fine and drives fine untill I hit a certain rpm. For first gear its around 6k. Second its around 3100. Third its around 2100. I've already checked for boost leaks
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Old 09-30-2014, 06:30 PM   #6
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This guy has the same problem but theres no answer. He describes it pretty well

http://forums.nicoclub.com/help-240-...m-t542441.html
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Old 09-30-2014, 10:53 PM   #7
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Could the CAS cause this?
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Old 10-01-2014, 04:28 PM   #8
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Here's a vid
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Old 10-03-2014, 09:21 PM   #9
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Alright I'm getting code 11 but sometimes the light will just stay on and sometimes it will give me code 55. I'm lost here
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Old 10-04-2014, 11:06 PM   #10
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I have no idea what to do now so I pulled the plug on the maf and it threw code 12 which didn't surprise me but it did also get rid of the cas code. Also I read up that the vss can cause this sort of problem?
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Old 10-05-2014, 12:40 AM   #11
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Got a buddy with a 240? Put your m.a.f on their car and see what happens. Easy way to rule the m.a.f out for good.
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Old 10-05-2014, 04:00 PM   #12
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The mafs I'm using is brand new so I don't think it's that. I am using a ka24de mafs but I have a safc. I'm going to grab a sohc mafs and see what happens
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Old 10-06-2014, 07:56 PM   #13
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Same thing with the sohc maf
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Old 10-06-2014, 07:57 PM   #14
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Could a leak at the intake manifold cause this?
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Old 10-07-2014, 05:40 PM   #15
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No one has had this problem?
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Old 10-07-2014, 11:42 PM   #16
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I've also ruled out a bad ecu
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Old 10-08-2014, 07:47 PM   #17
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It ended up being the CAS for anybody that has the same problem
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Old 10-08-2014, 08:09 PM   #18
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Glad you found it!
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