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Message: <blockquote data-quote="shem_lexluger" data-source="post: 1063382034" data-attributes="member: 85829">Hi bros,Need some help to pinpoint why my check engine light is on. I'm using BT engine from 6spd but attached to 5spd gearbox with BT 5spd ECU.My car just released from bengkel for transplant job for about a week. First time the check engine light came on randomly during driving and no power loss or no other effects can be felt physically. Everything normal other than my own uneasy feelings. But the light remained on. So went back to bengkel to check. After some checking by shorting some pins in the diagnosis port and looking at how many times the CE light was blinking, and then referring to some manuals, the mech came up with a conclusion either MAP sensor or knock sensor is faulty. So pulled out a MAP sensor from another 20V waiting in the bengkel and plugged into my car. Drove around abit then light still came on. Then opened all the intake manifold to locate the knock sensor and replaced it with one knock sensor unit borrowed from halfcut shop. Then drove around and CE light no more. So I bought that sensor for RM120 and went home feeling relieved.So 2 days gone by without any CE light. Then today the CE light came again. It came on about 5 times. What I meant by this is if I turn off my engine and on again, then the light will off. Once while climbing hill using 3rd gear revving till 3k rpm speed probably around 40+. The other 4 times occurred while speedo just above 80kmh in 4th or 5th gear. My driving style is normal, revving max occasionally till 3.5k rpm. Like previous one, CE light came on and no difference whatsoever. Everything is normal physically but light remained on until I turn off the engine. I still can drive at 100kmh on hiway and feel perfectly normal.I don't know if this is relevant at all. But I haven't changed my piping yet. Still running the piping I installed when my engine was 4AFE with size about 1.8" and a center bullet. Of course when rev till 3.5k like that can hear the exhaust rattle a bit.So I hope with this detailed info sifus in here can provide some insights.Thanks---------- Post added at 11:12 PM ---------- 6 hour anti-bump limit - Previous post was at 07:33 PM ----------Just an update. I went to mamak just now and CE light came on. Then after I got inside the parking space and turn off my engine, it runs on for a bout 1.5 sec before shutting down, similar feeling like having a turbo timer. Now that's scary.Wikipedia reference <a href="http://en.wikipedia.org/wiki/Engine_knocking#Pre-ignition" target="_blank">Engine knocking - Wikipedia, the free encyclopedia</a>On the way home from mamak, CE light came on also but pre-ignition didn't happen.</blockquote>

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