08 ranger engine problem
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Lead Driver
Joined: Mar 2004
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08 ranger engine problem
This truck has developed a kind of surge or bucking at low rpm. It's a 4x4 5 speed 3.0. It only does it when its rolling, lugged down in a gear starting out. I don't notice it starting from a stop and running up through the gears. When making a slow turn in a intersection and then getting into the throttle it will buck just a few times till the engine and vehicle speed get up. It never stalls and idles fine. If your driving down the road and floor it, it doesn't do it. It hasn't gotten any worse in the 2 weeks it's been doing it and there are no codes. I haven't had a fuel psi gage on it yet.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,529
Likes: 35
From: Kansas
I second Pawpaw's answer. You didn't mention the mileage on this or if the plugs had ever been changed. If there's any doubt, change the plugs (with Motorcraft), fuel filter and possibly the wires.
Speaking of plugs, my '98 3.0 has 100K on the plugs, just started to experience the same conditions and I need to give it some attention.
Speaking of plugs, my '98 3.0 has 100K on the plugs, just started to experience the same conditions and I need to give it some attention.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
OK, good find, fix, feedback & to hear new plugs seems to have put things right.
Seeing as it wasn't misfiring constantly, maybe it didn't happen often, or long enough to aggravate the computer enough to turn the CEL on, But it may have stored a Pending code, so did you scan with a code reader or scan-tool???
Seeing as it wasn't misfiring constantly, maybe it didn't happen often, or long enough to aggravate the computer enough to turn the CEL on, But it may have stored a Pending code, so did you scan with a code reader or scan-tool???
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GeoMan
1983 - 2012 Ranger & B-Series
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Aug 18, 2004 10:40 PM
