Mxzx440

Car was running perfectly when I pulled into garage. When I start today to back up, rough running with codes:

P0300 Random/Multiple Misfire
P0302 Cyl 2 Misfire
P0303 Cyl 3 Misfire
P0305 Cyl 5 Misfire
P0108 Man. Abs. Press/ bro press circuit high input

I changed plugs and no change. Timing belt was done 10,000 miles ago.

Again, just happened when started up today.

Any ideas?

Thanks

nfnsquared

Bad MAP sensor or MAP sensor connections?

Mxzx440

Just did the coil check by pulling plugs and it appears #5 coil is culprit. Test was done at idle with no noticeable change in rpm or miss with it pulled.

Swapped to adjacent cylinder and same result, and appreciable rpm drop and roughness with #5 pulled with different coil.

Hope this does it!

Mxzx440

Yep, #5 coil. $30 at Advance Auto and back in business.

Car has 104,000 and is a 2004.