rough running issue

[93PathfinderGU]

Ok so I have a 93 with the 3.0 V6. The other day I was driving down the road and on acceleration I had some hesitation untill my speed leveled out. I came back to the house and parked it and it had somewhat of a rough idle. I changed the spark plug wires and it got worse. Then I changed the coil and it was still bad. So then I went to the MAF and it was still the same. When it got to operating temp it would shut off and I couldnt restart it. So then I changed the spark plugs and it got better but there is still something not right. When I turn on the A/C the power loss and idle still gets worse. Im at a loss of what the issue is now but after replacing all of that its still better than what is was after I replaced just the spark plug wires.

[93PathfinderGU]

also be advised the check engine light is not on

[smj999smj]

I would start by testing your fuel pressure with a fuel pressure gauge and confirming there are no vacuum leaks. Then I would check for play in the distributor shaft and next a compression test, especially if there is a lot of time and mileage on the timing belt; it may have jumped a tooth. If it jumped at the crank sprocket or left cam sprocket, it would result in a jump in ignition timing (usually it retards it). So, putting a timing lot on it a seeing if the timing is out of spec might be worthwhile. Also, since it ran worse with the new wires, you may want to double-check your firing order.

[93PathfinderGU]

Ok thanks. I was thinking fuel too. It has 69000 miles on so I wouldnt think timing but I f it isnt fuel im heading there next.

[93PathfinderGU]

Also when I replaced the wires i replaced them one by one so i didnt mess up where they went.

[smj999smj]

Timing belt on the 93 Pathfinder is due at 60,000 miles.

[93PathfinderGU]

Well today I drove it after replacing the fuel filter and air filter and it doesnt have any power under acceleration and going up hills but keeping a steady rpm its fine. But when it gets too warm (a little over operating temp), it wont stay running.

[smj999smj]

Replacing the fuel filter never hurts, but still doesn't tell us if the fuel pump output is within spec. That you need to test with a fuel pressure gauge.

[93PathfinderGU]

Found out the person before me replaced two of the spark plug wires in the wrong spots so even though i replaced them one by one so i wouldnt mess it up they were still wrong. So issue fixed i got them in the right order. Thank you hanes manual haha and thanks yall for the input.