Just bought the truck and put long tube headers, and 2.5" duals into flowmasters and dumped, no cats. it was sputtering bad so I had the carb cleaned and rebuilt and tuned by a very reputable engine builder in my area. . It seamed to run better for starting etc but still isn't running right. I put all new spark plugs, wires, rotor, cap, coil, fuel filter. The motor is misfiring really badly. I look under the hood and with the new ceramic coated headers all the tubes from each cylinder look fairly clean and new except 1 of them, cylinder #4 (the second from the front on the passenger side). That pipe coming from the head is Turning rusty and dirty like its not being used. I pulled the plug And it is not black with carbon like the others are so it seams like it is not firing. It has a bit of oil on it, which I believe is normal right?.. Here is the thing, all the plugs are new, wires, rotor, cap, coil is all new..
Does anyone know what could cause this? I thought maybe a broken pushrod not openin the intake valve? Me and a friend tried using a digital compression tester and I think it broke because we tested cylinder 2 And it went up to 85 ish and then started blowing air out. Now it will only read 23 psi and then we tested the bad cylinder #4 and got 23 psi and you can feel air blowing out the Guage so I think it's a broken tester.
Anyways. No idea what is going on here.. Does anyone have Any ideas what I should check next?
Getting frusterated!!
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