Mechanics

SUDDEN RPM DROP AT ANY SPEED AT ANY TIME!

1998 Mazda 626

Engine Performance problem
1998 Mazda 626 4 cyl Front Wheel Drive Automatic 85000 miles

No matter what speed or rpm driving - the rpm will drop from the current rpm to 1000 rpm (for a less than an second) and then return to original rpm resulting a " jerk" in the transmission. No engine light comes on. Problem is sporadic, occurring at any rpm or regardless if the A/C is running or not. Took the car to a mechanic who checked spark plugs and wiring and found no problems. Could it be the fuel filter?
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Finnjoker
October 31, 2008.



Scan the computer even if you don't have a check engine light-

Have the fuel pressure checked if okay-check/test the throttle position sensor, MAF sensor, vehicle speed sensor-

Rasmataz
Oct 31, 2008.