1998 Mazda 626 Sudden RPM drop at any speed at any time!

1998 MAZDA 626
85,000 MILES • 4 CYL • FWD • AUTOMATIC
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FINNJOKER
  • MEMBER
  • 1 POST
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?
Oct 31, 2008 at 1:15 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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-
Oct 31, 2008 at 4:48 PM
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