Hi
I have replace engine control unit on chervolet v8 2000 model
number 2cylinder and 7cylinder are not function but if i check firing
of the spark plug it fires ok and i have replace the injector still the
same problem. so what can i check again.
Thank you
AUTOMAGIC
a bad coil or plug to be safe change both
this could be a bad plugwire or sparkplug or a bad coil for cylinder 7.
Random misfire, cylinder 2 misfire, and cylinder 3 misfire. see related question below.
What causes misfire 302, 304 and 306
random/multiple cylinder misfire!
The exact cost to fix an engine cylinder misfire on a 2000 Mercury Mystique will depend on the exact type of engine it has, but can cost around $1,000.
Cylinder 1 Misfire Detected
Cylinder Number 1 Misfire Detected
Code P0304: Misfire at cylinder 4 detected.
Cylinder #2 Misfire
A P1399 code is a cylinder 1 misfire code
Bad ignition coil? Common problem each cylinder has it own coil located at the top of the spark plug