No check engine light? but the engine is jerking on 2004 Mazda MPV

No check engine light? but the engine is jerking If the light's on, the light indicates that the computer has detected a malfunction in the engine/transmission control system and has no diagnostic codes and data stored which would be essential in diagnosing the problem. A technician with a scanner can access the diagnostic codes and data and then be able to give you a diagnosis. If no light, check out the ignition system. I think that misfire under load is usually poor ignition. If you want to find a Mazda specialist, here's our directory link for you:

by in Nashville, TN on June 22, 2013
0 answers
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The engine was jerking sometimes when I drive my mpv but not at idle.

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