Engine misses on take off from stop.

check the injector for that cylinder as the electrics is not the only thing to cause a misfire.. Put the injector in another cylinder and see if the misfire has moved

check for spark in cylinders 1 and 4 if none, replace coil pack. If spark is present replace spark plugs in cylinder 1 and 4

Could be computer

For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

On GM inline engines,cylinder #1 is the one closest to the front(pulley)end of the engine. If you pulled the wires off the distributor/coil pack,and don't know where they go,put one wire one at a time and crank it.If it doesn't backfire,repeat until it starts.(this is only easy on 4 cylinder or smaller engines)

You might need to have the injector removed and inspected/replaced.

There are no "special" tools required. Here is how you would do it:

NOTE: This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.

I also recommend putting a small amount of anti-seize compound on the threads of the spark plugs when installing. Be careful not to under or over-tighten because cylinder head damage could result. If you have access to a torque wrench, the specification is 11 foot pounds.

1. Disconnect the ignition coil electrical connectors.
2. Carefully release the number 1 spark plug wire from the clip on the number 2-3 ignition coil.
3. Remove the 2 bolts from each ignition coil.
4. Remove the number 1 spark plug wire and the number 1-4 ignition coil from the spark plugs.
5. Remove the number 2-3 ignition coil and the number 3 spark plug wire from the spark plugs.
6. Remove the spark plugs from the cylinder head.
7. Reverse proceedure to install.

which two cylinders?

i have a 2001 chevy z-71 5.3L. I keep getting a random/multiple misfire code for cylinder 1 . I have replaced plugs, wires, coil pack(only on #1 cylinder)., and fuel pump. I still keep getting the cylinder 1 misfire code. I put truck on a scanner and watched the cylinders. # 1 misfires at idle but quickly stops misfiring at around 1000 rpms. you can here the engine miss at idle but truck runs great on road . anyone else ever had this problem?

possible plug or wire. check spark at coil also, may be check the injectors listen for clicking sound