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zchdrl
09-29-2014, 09:54 PM
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
OnTheChip
09-30-2014, 08:06 AM
Clogged fuel filter maybe?
zchdrl
09-30-2014, 09:41 AM
Possibly but with a clogged fuel filter would it idle funny or stumble when driving?
Primo's Silvia
09-30-2014, 09:45 AM
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 :picardfp:

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.
zchdrl
09-30-2014, 01:40 PM
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
zchdrl
09-30-2014, 06:30 PM
This guy has the same problem but theres no answer. He describes it pretty well

http://forums.nicoclub.com/help-240-falls-flat-around-3500-4000-rpm-t542441.html
zchdrl
09-30-2014, 10:53 PM
Could the CAS cause this?
zchdrl
10-01-2014, 04:28 PM
Here's a vidhttps://vimeo.com/107763114
zchdrl
10-03-2014, 09:21 PM
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
zchdrl
10-04-2014, 11:06 PM
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?
spiegel420
10-05-2014, 12:40 AM
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.
zchdrl
10-05-2014, 04:00 PM
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
zchdrl
10-06-2014, 07:56 PM
Same thing with the sohc maf
zchdrl
10-06-2014, 07:57 PM
Could a leak at the intake manifold cause this?
zchdrl
10-07-2014, 05:40 PM
No one has had this problem?
zchdrl
10-07-2014, 11:42 PM
I've also ruled out a bad ecu
zchdrl
10-08-2014, 07:47 PM
It ended up being the CAS for anybody that has the same problem
OnTheChip
10-08-2014, 08:09 PM
Glad you found it! :goyou: