Question about 1994 Mazda 929

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1982 mazda 929 MV motor, idles & runs perfect motor is spot on but! it won't stop surging when driven in forward gears 1,2 &3. Have replaced points/distributor/coil/fuel pump/filter but still it bunny hops along. I figure it must be in electrical system????? Kindest regards, Big Stu

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Sounds like the ECU is struggling to maintain a constant speed when the throttle is open on cretain spots. Does this vehicle have a TPS (throttle position sensor)? If it does then it probably needs to be put on a scope and properly adjusted for continuity. Or could be that some other factory settings have been tampered with on some smog components. Either case, its most likely your air/fuel ratio.

Posted on Mar 20, 2009

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