2003 Infiniti QX4 Questions

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After giving a jump all the gages are swinging back and forth, the check engine light along with all the other lights are lit on the dash, as soon as the cables are removed the car cuts off, this is the first time thi...
I do not get A/C or heat, unless I turn on my defrost, and then it doesn't blow, so I have to turn it up higher (or lower for A/C) to get anything. What could be the problem?
what are thew costs associated with new or used engine for a 2003
For tuneup, I'm buying 6 spark plugs and 6 coil - in boots. Do I need to also buy 6 ignition coils or just 1?
Code P1456 appears what does that mean
Service Engine Soon Light came on and it was checked by a local mechanic. He indicated that it was code P1456. He also told me it could be several different things and wanted to charge me lots of money to do diagnos...
THE DRIVERS SIDE POWER SEAT WON'T GO FORWARD AND BACKWARK, HOWEVER WILL GO UP AND DOWN. ALL FUSES ARE OK. I DON'T WANT TO TAKE IT TO THE DEALER! WHAT CAN I DO ANYBODY
The heater fan will not turn off, it is going full speed all the time how do i repair this?