Number 1 cyclinder is miss fire. need diagram for where the number 1 cylinder coil is

fzr firing issue The FZR Forum


Hope this helps, Nik.

Firing order is 1, 5, 3, 6, 2, 4. Number 1 cylinder is up front. Why would you need the firing order, this engine does not have plug wires, each plug has its own coil pack, each coil pack is controlled by the computer.

Try moving the coil pack from cylinder 1 to another cylinder (swap locations) and see if the same code comes up. If code is different, then coil pack is bad. Other reasons for miss; bad injector, poor compression.
Also, I know you changed plugs already, but always use AC Delco 43-103 plugs on this vehicle.

Try replacing the ignition coil that fires those cylinders.

check for spark at the coil, if its weak, or no spark, replace the coil pack.

IF YOU KNOW IT IS MISSFIRE FROM READING CODES, THEN YOU KNOW IT IS ELECTRICAL AND NOT A VACUUM LEAK. THE CHEAPEST THING TO DO IS REPLACE THAT SPARK PLUG AND SEE IF IT HAPPENS AGAIN ON THE SAME CYLINDER. YOU MIGHT WANT TO CHECK THE COMPRESSION ON THAT CYLINDER WHILE YOU HAVE THE PLUG OUT. IF YOU STILL HAVE PROBLEM REPLACE THAT PLUG WIRE. IF IT HAS INDIVIDUAL COIL MOUNTED ON EACH PLUG, THEN TRY SWAPPING FOR ANOTHER COIL ON ANOTHER CYLINDER. ]
THE PLUG-IN CONNECTOR ON THE COIL FOR EACH CYLINDER IS PRONE TO GIVE TROUBLE. CHECK IT CAREFULLY AND MAKE SURE IT FITS TIGHT. IT SHOULD HAVE SOME WATER-PROOF ELECTRICAL GREASE IN THE CONNECTOR.
HOPE THIS HELPS. ROBERT

check valve adjustment on #5, is cam lobe worn?

double check plug wires to be sure they go to the right cylinders. After that i would check fuel injectors
You need a listening device and listen for metallic clicking sound. Bad injectors will be silent and they do cause the same miss

the firing order is, 1-2-3-4-5-6. coils from left to right are: 5-2-3-6-4-1. number 1 cylinder is in back under alternator or next to it.

You didn't post your engine size so please pick the applicable diagram:



1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise



1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise




4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise



4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)



5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise