I have a 2002 SL2 1.9 liter DOHC 16 Valve engine that bucks / kocks at low rpms. Changed coils, ECM & TPS & still bucks / knocks at low rpms. Looking to change MAP sensor next ?? But not sure Car as 1

Asked by Mar 07, 2015 at 03:45 PM about the 2002 Saturn S-Series 4 Dr SL2 Sedan

Question type: Maintenance & Repair

2002 SL2 Automatic 1.9L DOHC 16 Valve 100k miles
Has new ECM, Coils & Throttle position sensor installed but problem still exist
Was told it could be a MAP sensor ??

1 Answer

965

Hi maybe the knock sensor is bad? Have you tuned it up lately up? Check your spark plugs and spark plug wires might be your knock sensor I'm not quite sure hope this helps?

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