greasemanicure
Well-Known Member
- Joined
- November 1, 2006
- Messages
- 168
- Reaction score
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- City, State
- Burlington, NC
- Year, Model & Trim Level
- 1996 4X4 4R->5R mod
Our 96 Ex 4.0 OHV is throwing a code for a misfire on cylinder 4. No others. I've already done the plugs and wires. The coil pack was flaky on cylinder 2 so I changed that. Clear the codes and it will run without misfires for maybe five miles. The misfires do not seem to affect acceleration, etc. until you park it for a short while and then restart. Then the roughness and poor performance starts and the detected misfires do not make a difference. Spark is strong on 4 and all the others. Fuel pressure is in the mid-30s and seems steady enough. I've tried to find the injector for cylinder 4 to give a 'listen' but it seems to be buried under the intake, etc. I was tempted to pull the plug on the PCM to measure the resistance of the injectors from there. Any suggestions as to where I should look next will be appreciated.
Joe
Joe