2003 Mazda MPV Questions

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what needs to be done.

Rear and drivers side are severely worn

my van is giving me this code PO305

How much does it cost to replace a front crank seal?

checked fuses safety switches could it computer be shot if we didn't undo battery to change plugs or could it be bad batch of plugs

Hi, all, I would like to get some advise please?

I have Mazda MPV 2003. Recently I got P0305, cylinder 5 misfire. When I had this, I did in deed feel misfire, engine RPM dropped from time to time, and felt it would stall, though it never did. Anyhow, I hear P0305 is a common problem in MPV. I replaced spark plugs/coils for cylinders 4,5 and 6. Misfire appears to be much reduced (pretty consistent idle, though minor shake while accelerating), but P0305 keeps coming back (I reset the code 3+ times). I don't get any other cylinder codes, just P0305. What else should I try next? Is it ok to keep driving while engine light is on?

I did look at this page:
This page talks about checking Oxgen sensors, etc., but if these are bad, I assume I would get additional engine code in addition to P0305.

Any info is appreciated.

Thank you!

I'm changing out my engine.

unless I undone the hot battery cable

It drives and shifts great, just when I brake no matter what speed

My wife was getting gas the other day and opened the automatic door on the drivers side and it quit working in mid stream. She tried to force the door and it stuck she then remove the fuse to the door and replaced with new one it closed but after getting gas it would not start. I have replaced the fuses, the relay, and the pump and found there is still no power to the pump unit on the fuel pum side. The guage works fine. What is the problem I'm am in need of help.

idle high than seems to kick down a bit.When driving it seems to spike when going down hill.Never seems to go down at all witch is chewing up gas and makin use of brakes harder.When start back up pops from 3100 2100 to 1400 on tach. Fluxuates but never goes down past 1400.

03 MPV LX 182K miles started with OD/off flashing and it would jerk on every shift. trans tested out fine, upgrade done to module better for 2 days, now od light flickers. But no rough jerking on shifting until you least expect it and the like isn't on...WHAT IS HAPPENING?