1997 nissan pu 4x4 ka24e emgine freshly rebuilt new cap rotor wires plugs etc. with the timing light on each plug wire i get weay spark and intermittend on plug #1 and #3 #2 AND #4 seam to firing good.???????????????????????? thanks
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Do you mean p0303? And on a gm 4.3l V6? If so this is a cylinder 3 misfire. Cylinder 3 is the back drivers side cylinder. You will need to check the plug and wire. A compression test to rule out any I ternary problem would be advisable as well. Compression test needs to be done on all 6 cylinders. The results should fall in a range of +/- 10%. There are tons of causes for this from ignition module, wire, plug, injector or fuel delivery, bad map/maf sensor, valves problem, ring problem etc.
Hi there: Check this removal procedure (See Figures 1 through 5)
Disconnect the negative battery cable.
Unfasten the retaining clips (only remove the coil wire if necessary) and lift the distributor cap straight off. It will be easier to install the distributor if the spark plug wiring is left connected to the cap. If the plug wires must be removed from the cap, mark their positions to aid in installation.
Remove the dust cover and mark the position of the rotor relative to the distributor body; then mark the position of the distributor body relative to the engine block.
Detach the harness assembly connector.
Remove the pinch-bolt and lift the distributor straight out, away from the engine. The rotor and body are marked so that they can be returned to the position from which they were removed. Do not turn or disturb the engine (unless absolutely necessary) after the distributor assembly has been removed.
Exploded view of the distributor assembly-6-cylinder engine
Align the mark on the housing with the mark on the shaft-VG30i and VG30E engines
After the distributor assembly has been installed, the rotor should be in this position-VG30i and VG30E engines
After the distributor assembly has been installed, the rotor should be in this position-KA24E engine
INSTALLATIONTiming Not Disturbed
Insert the distributor in the block and align ALL matchmarks made during removal.
Engage the distributor driven gear with the distributor drive.
Install the distributor clamp and secure it with the pinch-bolt.
Install the distributor cap and fasten the harness electrical connector.
If necessary, install the spark plug wires and coil wire.
Start the engine. Check the timing and adjust it if necessary.
It is necessary to place the No. 1 cylinder in the firing position to correctly install the distributor. To locate this position, the ignition timing marks on the crankshaft front pulley can be used.
Remove the No. 1 cylinder spark plug. Turn the crankshaft until the piston in the No. 1 cylinder is moving up on the compression stroke. This can be determined by placing your thumb over the spark plug hole and feeling the air being forced out of the cylinder. Stop turning the crankshaft when the timing marks indicate TDC or 0 .
Oil the distributor housing lightly where the distributor bears on the cylinder block.
Install the distributor so that the rotor, which is mounted on the shaft, points toward the No. 1 spark plug terminal tower position when the cap is installed. Of course, you won't be able to see the direction in which the rotor is pointing if the cap is installed, so lay the cap on the top of the distributor and make a mark on the side of the distributor housing just below the No. 1 spark plug terminal. Make sure that the rotor points toward that mark when you install the distributor.
On the VG30i and VG30E engines, align the mark on the distributor shaft with the protruding mark on the housing.
When the distributor shaft has reached the bottom of the hole, gently move the rotor back and forth slightly until the driving lug on the end of the shaft enter the slots cut in the end of the oil pump shaft and the distributor assembly slides down into place.
On the VG30i and VG30E engines, the distributor rotor tip should be in the 11 o'clock position.
Fasten the distributor hold-down bolt.
Install the spark plug into the No. 1 spark plug hole.
Install the distributor cap and engage the harness electrical connector.
If necessary, attach the spark plug wires and coil wire.
Start the engine. Check the timing and adjust it if necessary.
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I would suggest replacing the spark plugs and plug wires. Especially on the cylinder that is misfiring. But if you don't replace all of the plugs and wires. The problem will probably move. Also a new cap and rotor is a good idea. But a misfire means that the spark plug did not fire.
You have spark on the coil wire but not coming from the cap. You replaced the cap right. Did you replace the rotor too. Sometimes the rotor burn in the center and the spark goes right thru it in to the distributor shaft.
Are you sure it's the spark plug that's faulty or the ignition wire?? How old are plugs and wires? If you don't know if it's your spark plug not firing or your ignition wire you could move spark plug to number 1 then check your code reader. Or you could do an ohms continuity test on your number 2 ignition wire to verify that there is no break in the wire. Common problem to check for. If wires and plugs are old and high mileage maybe should change all including cap and rotor on distributor. Fresh wires plugs cap and rotor always improve mileage and performance. Good luck, sorry can't help with tranny.