1999 4.0 aw4 np231 rustys air tube, flowmaster catback
Symptoms: hard to start, rough idle when cold for like 20 seconds, i noticed raw fuel smell in my air filter at an oil change once.
I had a check engine light come on today and the code was po301 cylinder misfire #1. I cleared the code and will see if it comes up again. Cap, rotor, spark plugs all were changed about 8k miles ago. Also sporting some old accel 8mm wires which are still in pretty good shape.
After checking the code I went home and did some searching and found 2 threads on the code that were not much help besides doing a compression test. After checking wires and such i figured to hit the valve on the fuel rail just to see what would happen. Nothing, no pressure whatsoever. Started it and had extended crank like usual.
How long do leaky injectors take to leak down all that pressure?
Should i look into replacing parts on the pump first?
Could the code be part of the problem?
Also MAP sensor was changed last week, and i have been trying to run ethenol free gas for the last month.
Thanks in advance.
Sorry for the long read.
Symptoms: hard to start, rough idle when cold for like 20 seconds, i noticed raw fuel smell in my air filter at an oil change once.
I had a check engine light come on today and the code was po301 cylinder misfire #1. I cleared the code and will see if it comes up again. Cap, rotor, spark plugs all were changed about 8k miles ago. Also sporting some old accel 8mm wires which are still in pretty good shape.
After checking the code I went home and did some searching and found 2 threads on the code that were not much help besides doing a compression test. After checking wires and such i figured to hit the valve on the fuel rail just to see what would happen. Nothing, no pressure whatsoever. Started it and had extended crank like usual.
How long do leaky injectors take to leak down all that pressure?
Should i look into replacing parts on the pump first?
Could the code be part of the problem?
Also MAP sensor was changed last week, and i have been trying to run ethenol free gas for the last month.
Thanks in advance.
Sorry for the long read.