Join Date: Apr 2013
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2003 bucking up hill and loosing boost......
Was pulling about a 6% grade after about 1:30 of driving through the hills in my 2003 ex when it started bucking like maybe there was a miss. All my gauges looked good and no engine lights except my boost would drop from around 17 psi to 10-12 at each buck or miss or whatever it was. I'm not really sure what it was since I'm new to my diesel having issues.
The coolant, filters and everything has recently been changed and my deltas have been a solid 9 degrees. I have been running the ford cetane booster for the past 1500 miles too. And I have replaced the coolant cap with the updated ford part. This was my first real test running it through the hills so I'm at a loss.
It has been having the 50-75 rpm surge at idle though once hot. So any questions? The rig has about 96k miles on it. Thanks!!!