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Why does my 1998 Mazda B4000 get such BAD gas mileage? Air

Why does my 1998 Mazda...
Why does my 1998 Mazda B4000 get such BAD gas mileage?
JA: When did you last clean or replace your air filter? And are the oxygen sensors in good working order?
Customer: Air filter is new. Don't know about sensors, but check engine light comes on often.
JA: Are you fixing your B4000 yourself? What have you tried so far?
Customer: I've been taking it to a mechanic when ck engine light comes on n leave there with a bill around $500 each time!
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
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Answered in 2 minutes by:
11/18/2017
rpmdiag
rpmdiag, Tech and Instructor
Category: Mazda
Satisfied Customers: 8,292
Experience: Since 1975
Verified

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

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So you're on the right track by getting the diagnostics done, but it seems the problem is the shop/technician doing the work. For that kind of money, the problem should have been diagnosed and repaired. First I would talk to the manager of the shops you spend all this money at, then I would call AAA member or not, and they will direct you to a good honest shop.

Please understand that I don't know your skill level or tools
you have to assist us. Also understand that I can't see, smell,
hear, or touch the vehicle either, so your patience is
appreciated. JA is a great Q/A site, but it does not replace a
repair shop. So please don’t shoot the messenger if I have to
deliver bad news:)
If you are satisfied with my answer, I would greatly
appreciate a 5 star rating now before you leave the site and I
will still assist you after you have rated me too if another
question pops up. I don’t get credit for helping you until
you rate me

Thanks, Ron

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There are way too many reasons for fuel economy to drop off, that's why it's critical to get a good diagnosis.

Did you have any more questions for me at this time?

Thanks again, Ron

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Customer reply replied 23 days ago
Current diagnosis by my shop: 1 bad sparkplug n bad fuel injector for $500!
Well, either they were wrong, or there are additional issues that they didn't find.
Thanks again and please remember to rate me 5 stars now and keep this link.
Ron
rpmdiag
rpmdiag, Tech and Instructor
Category: Mazda
Satisfied Customers: 8,292
Experience: Since 1975
Verified
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rpmdiag
rpmdiag
rpmdiag, Tech and Instructor
Category: Mazda
Satisfied Customers: 8,292
8,292 Satisfied Customers
Experience: Since 1975

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