Any time engine jerk/semput semput dan check engine light up short while

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Mat Indera

Active Member
Joined
Feb 26, 2014
Messages
26
Points
503
Location
Kuala Lumpur
My wira 4g93t with evo3 air flow sensor, td05 turbo, 510cc, evo3 rechip ecu for 2 bar, afr, 255l fuel pump. All inside/outside upgraded. Run smoothly for a year. I set max for 1.2 bar boost only. Last 3 days ago suddently engine check light flashing sometime than dissappear. Yesterday the engine become jerk @ semput semput for short while and back to normal again. It happen at any rpm. When jerk/semput check engine flashing shortwhile. Clearly to me it disturb the fuel and/or ignition system. Fuel filter and fuel pump rule out- aready checked.

Sometime I can drive for an hour with out a problem. Sometime it happen 2-3 time within 5 minutes. Jerking/semput shortwhile than back to normal again.

Guys can you help?.
 
Tried ECU scan already? Check engine light comes on can be many things. Even when I wash VR engine bay, sometimes check engine comes on but no problem driving. Then after engine heats up the light goes away....:rolleyes:
 
Will try but in the workshop during idling everything ok. No check light and idling smooth. Since 3-4 days raining everyday and car driving during raining. Want to wait shinny and hot day and see what happen. Just know cleaning air filter and air flow sensor/ socket.
 
Yup, can be dirty sensors also. O2 sensor going also can have check light on and off....
 
just clean your MAF sensor....usually that would be the cause....
 
I had the same problem last time, mine was the maf sensor connector was lose, so I bought long cable tie and tied up the maf connector and try to check ur spark plug
 
yesterday I drive for another 5 hours, engine ok. The work I m doing are cleaning MAF/ socket, cleaning air filter, re-tighten the cam sensor socket, re-tighten loose hose clamp at turbo inlet . I dont know which one is a real problem.
 
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