Went thru same deal w/ '03 Ford Escape
Repetitive, fast hesitation, lasting 1-2 seconds, more evident climbing a incline, while slowly administering gas. Random or none on level ground.
---No codes --- (cleaned 1st, and/ or replaced the following
New Plugs. Then "genuine plugs". Bah-Hum-bug, nothing wrong with the other new ones, I just installed!
Boots and springs
A new IAC for Sheets & Giggles!
Mega Vacuum leak search several times.
Fought with wife many times over situation, 2+ months!
I really hated taking off the "Plenum" so many times to access the other 3 cylinders
Each part seem to fix it for a day or two.I did not mind replacing the suggested parts, as I am all for "PM" and she's got 100,000 miles on her rig.
The final cure was #3 misfiring (lucked into the correct cylinder) I was gonna swap a new coil pack down the line, till it stopped
#3 was the ticket!
I had tried to get the Technical school to ride me with their portable machine---things did not work out, with their schedule.
I went to a salvage yard to get a used pack ($10) to swap around, then buy a new one if solved the problem.
So happened, the salvage yard guy had a machine, in a stored code, it said #3 had misfired. My little scanner could not tell me that!
Runs perfect now, with the New $79 Coil Pack!
Always stick with a Jeep CJ, You can diagnose them, as you hear 'em drive by!
Thursday, June 16th, 2011 AT 6:38 PM