No power

327IMPALA1

MEMBER
2000 MAZDA MILLENIA
6 CYL
FWD
AUTOMATIC
135,000 MILES

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.

3 Replies

KHLOW2008

MECHANIC
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?

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Sunday, August 7th, 2011 AT 11:17 PM

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

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Monday, August 8th, 2011 AT 3:24 PM

KHLOW2008

MECHANIC
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.

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Tuesday, August 9th, 2011 AT 11:06 AM