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I don't know liter size of engine? If cylinder misfire, it should set a trouble code for that cylinder, then you check fuel--spark--compression for that cylinder.
If you have the 2.2L engine, then the ignition module sits right on top of spark plugs. You can turn the module up side down, use a known good plug in each boot, reconnect the module wiring connector. You need to turn the assembly so metal part of spark plugs touch metal part of engine or use a jumper wire from metal part of spark plugs to metal part of engine, have a helper crank it, while you watch for spark. If you got spark everywhere, then check fuel, and so on.
If you have spark plug wires, I have found a digital multimeter is sensitive enough it will react to inductive voltage. With engine running just touch each spark plug wire in turn and take a reading. You don't penetrate the plug wire or take it loose. I have seen readings about .6 or .7 volts, the point is most of them should have close to same reading, so if you get one or two that the reading is bouncing off zero, you know where to look.
I'm not saying it will work on every year--make--model, I don't know? It has worked for me, in the past.
did you adjust the plugs to the right spark plug gap should be 8mm, did you put the leads back on the right spark plugs. ? firing order 1342 number one is at front. from left on dispack 4123 this is from left to right. other engine 135 246 number one top left. dispack 146 325 number one is first from left. check this is right aswell.
check you dont have a broken lead removing them
one at a time with engine running will show you which
cyl is not firing check plug wasnt cracked when being
fitted change lead double check firing order
if the engine didnt miss before the plugs were
changed then this course of action should fix the miss
its easy to cracl spark plugs when fitting if the plug socket
does not have rubber insert
carbon leads only need to be pulled to hard or
bent to far to damage the carbon fibers that
run through them
check that you dont have two leads crossed this
is a common mistake with v8sand is easy to do
check your plug wires (by opening the hood and start in a dark place a cable leek will show sparks)
if ok \
you may have put the plug cables in a wrong order
last but not the least it could be faulty fuel pump
CHANGE SPARK PLUGS.YOU NEED SPARK PLUG 3/8 SOCKET.YOU NEED SHORT AND LONG 3/8 EXTENSIONS.YOU NEED SPARK PLUG BOOT PULLER AND A SPARK PLUG GAUGE SET THE SPARK PLUG GAP.NOW CHANGE 1 SPARK PLUG AT A TIME SO YOU MIX THEM UP GET FIRING ORDER MIX UP CAR BACK FIRE WONT CRANK.ALSO CHANGE PLUG WIRES ALSO.
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