Spark plug wire replacements for 96 blazer

a faulty ignition module could be the problem. some vehicles have one for the whole system while others have multiples. you can test individual cylinders by first removing the fuel pump relay, then one at a time remove the spark plugs and ground it to the engine block while a helper hits the key. you should clearly be able to see a spark jump across the spark plug. you can also purchase a diagnostic tool which you hold over the wire while a helper turns the key and it reads the current in an inductive manner. if all cylinders are receiving spark then your timing may be out, in some newer (96 and up) vehicles fine tuning of the timing is achieved via ecm in conjunction with the ignition module and cam/crank sensors. in older and a few 96 and up vehicles timing is done solely by the clock position of the distributor. a timing gun can be used to establish correct timing (refer to owners manual/repair manual for proper advancement or retard of ignition timing)



in the event that you have a properly working and timed ignition its most likely you have a burnt valve or dead cylinder, a compression gauge is the best way of diagnosing these issues.



lastly vortec fuel injection systems are finicky about fuel pressure, incorrect fuel pressure will cause the vehicle to run rough,stall ect...most run right around 60psi you can test your system by hooking a test gauge up to your service port.

have you checked the spark plugs for a gas smell. if there is a gas smell then it is your injectors.

hi...
1.try checking the clearance in the spark plug if you have insufficient or more clearance you wont get spark check this.
2.check the wire coming to the spark plug.if power is not coming to spark plug there wil be discontinuity in the wire try replace it.

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Hi,there is label number on spark plug wires.try to match the same number and replace one spark plug wire and one spark plug at the time!!!
good luck!!!!!!

Check for spark by removing one of the plug wires from a spark plug and installing one of your old plugs in the removed wire (leave the other end of the wire attached to the cap). Rest the exposed plug on an under-hood surface that will provide a sufficient ground and have some one turn over the engine. You should se a strong blue spark. We have seen some intermittent coil problems on your generation Blazer that would explain a lack of spark. Good luck!

Chevy usually puts the spark plugs down below the exhaust manifold.
You usually have to do them by feel, or use a mirror.

do you know for sure its the injectors?

my 96 blazer would have random missfires.... sometimes more than one cylinder at a time... there are a few things to try.... 96 vortecs still used distributor caps... but they had such a high intensity spark that they were well noted for frying distributor caps and ignition coils... i would start there... also a few times i had to replace the crankshaft timing sensor.... it could be something as small as a spark plug wire... i would start with the ignition before spending money to check the fuel system

The fuel filter could be plugged.

Go back to basics. Check if you have spark. From the coil and the plugs. Check if you have fuel pressure, check if you have compression on all cylinders. If you have all three action should happen.