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Well-Known Member
Picked up a 2000 4.0 OHV with approx 150,xxx on the clock.
Rough idle between 1500-2000 rpm, down on power.
Replaced plugs, affected wires, checked another coil pack. Have a fuel injector on order, but just tested two injectors and they're both similar resistance. Around 16.2 I believe. Did it while they were cold, don't know if that makes a difference? Before I install the new one, I'll probably just swap 3 with 2.
No signs of a blown/leaky head gasket. Cannot hear any broken valve springs.
I realize that neither of the last two mentioned things are fully conclusive as I have not down a compression check.
Any other ideas? Picked this up reasonable enough, that if worst case I ended up replacing the heads I'm into it for about market value. Obviously I would rather keep the change in my wallet vs sticking more money in it.
Thanks for your time....
ps: Don't know if it makes a difference, but the kid who I bought it from had removed the cat and has a glass pack on it. So the O2 sensor behind the cat is gone.
Rough idle between 1500-2000 rpm, down on power.
Replaced plugs, affected wires, checked another coil pack. Have a fuel injector on order, but just tested two injectors and they're both similar resistance. Around 16.2 I believe. Did it while they were cold, don't know if that makes a difference? Before I install the new one, I'll probably just swap 3 with 2.
No signs of a blown/leaky head gasket. Cannot hear any broken valve springs.
I realize that neither of the last two mentioned things are fully conclusive as I have not down a compression check.
Any other ideas? Picked this up reasonable enough, that if worst case I ended up replacing the heads I'm into it for about market value. Obviously I would rather keep the change in my wallet vs sticking more money in it.
Thanks for your time....
ps: Don't know if it makes a difference, but the kid who I bought it from had removed the cat and has a glass pack on it. So the O2 sensor behind the cat is gone.
