no power

2000 MAZDA MILLENIA
135,000 MILES • 6 CYL • FWD • AUTOMATIC
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327IMPALA1
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  • 30 POSTS
car has no power,bad accelaration but when disconnect mass air flow the car runs much better,i have 5 codes PO304,421,431,725,750,the car has no miss,i don't belive the cats are clogged,and the trans has a bad solinoid,but it the trans operates very well,it seems like an electrical problem,i replaced the mass whith 2 other new ones but still the same.
Aug 7, 2011 at 10:29 PM
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KHLOW2008
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  • 41,814 POSTS
A bad trans solenoid can mean the gears are not down shifting to provide the correct gear ratio for acceleration.

The cat efficiency below could mean the cats are clogged. What makes you think they are good?

Aug 7, 2011 at 11:17 PM
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327IMPALA1
  • MEMBER
  • 30 POSTS
i know this car well,the trans is working the same as before.If the cats were clogged,the car would not run better when i disconnect the mass air flow
Aug 8, 2011 at 3:24 PM
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KHLOW2008
  • CERTIFIED EXPERT
  • 41,814 POSTS
Clear the trouble codes and run vehicle then recheck what codes comes up first.

If trouble codes are coming up, you need to find out what is causing them.
It could be electrical, ECM or components.
Aug 9, 2011 at 11:06 AM