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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 11-08-2015, 02:38 PM   #1
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s14 Nissan S14 Problem.

I was on a rolling road with my newly build sr20det engine, to get it optimized, and it done a good dyno with 340 HP at 1 Bar (Arround 14 PSI), but after 10 min in idle after the dyno, it start making a lumpy idle and at arround 2300rpm it jumps between 1900 rpm and 3000 rpm (The timing jumps between 20 and 70 ), and i got a new error indicator in my cluster.



Do anyone have any ideas ?

I have seen this post, but it don't help me
http://www.sxoc.com/vbb/showthread.p...-Warning-Light

A little about my Car :
Nissan Silvia s14 Zenki (JDM) Year 1994 with SR20DET blacktop
Nissan ECU (WC, red label) with Nistune Type 3 Board

Engine : Stock with arp bolts and HKS Metal head gasket.
Fuel system : Aeromotive STEALTH 340 pump, Aeromotive BYPASS REGULATOR, HKS 740cc injectors
Turbo system : Garrett GT2871R, Apex Type 2 manifold with DEI Wrap, AEM Tru Boost controller, HKS s-Type IC.
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Old 11-09-2015, 01:05 AM   #2
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That's your catalytic converter temperature warning light. The ECU goes into a safe mode when this sensor is triggered and will change the idle. You may have over heated it during the dyno runs or it maybe clogged with carbon deposits. It also maybe being affected by the change in air fuel ratios as a result of the dyno tune. Park it until it cools down and drive it like normal and see if the warning light goes off again. If it does, check the converter for deposits.
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Old 11-09-2015, 01:13 AM   #3
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Quote:
Originally Posted by Agamemnon View Post
That's your catalytic converter temperature warning light. The ECU goes into a safe mode when this sensor is triggered and will change the idle. You may have over heated it during the dyno runs or it maybe clogged with carbon deposits. It also maybe being affected by the change in air fuel ratios as a result of the dyno tune. Park it until it cools down and drive it like normal and see if the warning light goes off again. If it does, check the converter for deposits.
The Problem is i don't have any cat on, and the sensor was just stripped up at det bottom, it is now disconnected but it stays on, it was 10 days ago it was on the dyno.
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Old 11-09-2015, 01:34 AM   #4
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as he said exhaust temperature.
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Old 11-09-2015, 02:09 AM   #5
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I got no cat on, and the sensor is just stripped up in the bottom of the car, i have disconnected it now, but it don't help :/, i got the battery off in arround 2 hours but with no good result :/
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Old 11-10-2015, 12:21 AM   #6
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I have disconnected the sensor and reset the ECU with nissan data scan and by disconnect the battery, but nothing help.
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Old 11-11-2015, 01:58 AM   #7
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Nissan Data Scan comes up with nothing :s, maybe my ECU is done :/
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Old 11-24-2015, 12:00 PM   #8
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A little video with the error :
https://www.youtube.com/watch?v=LahkSgcPyhA

Sorry for my bad iphone cam, it need repair :S
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