1994 Mazda MPV Won't Go Past 40 MPH

1994 MAZDA MPV
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PALOMA PAUL
  • MEMBER
  • 14 POSTS
This is a 2.6 with 130,000 miles. It use to run great but now it runs rough, It won't go passed 40mph. It will barely re to 3,000. No check engine light. Fuel filter is fine as is the fuel pump and sock. Any suggestions? Thanks
Jan 5, 2006 at 4:02 PM
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COSMO
  • ✓Experienced Mechanic
  • 347 POSTS
possible clogged cat convertor...and possible faulty MAF sensor

Cosmo
Jan 5, 2006 at 10:08 PM
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PALOMA PAUL
  • MEMBER
  • 14 POSTS
The tail pipe was smashed so little exhaust could escape an easy fix. Thanks for the tip
Jan 7, 2006 at 2:25 PM
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Suggested Repair

Repair or replace the smashed tailpipe so exhaust can flow freely. Restricted exhaust can cause rough running and limited speed and RPM; if symptoms remain, also check for a clogged catalytic converter or a faulty MAF sensor.

Conversation Summary

The owner of a 1994 Mazda MPV 2.6 with 130,000 miles reported rough running, inability to exceed about 40 mph, and revving limited to about 3,000 rpm, with no check-engine light. The fuel filter, fuel pump, and sock had already been checked. An expert suggested a clogged catalytic converter or a faulty MAF sensor. The owner later found the tailpipe was smashed and restricting exhaust, and reported that correcting it was an easy fix.

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