Hic-up/Jerk in 5th from 55-70 mph going Uphill - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-17-2012
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Location: Killeen, TX
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Hic-up/Jerk in 5th from 55-70 mph going Uphill

2003 Ranger,4 Cylinder, 2WD-72,000 miles

I was making an 800 mile drive recently and noticed a strange problem WHen cruising at highway speeds and going uphill the truck would sort of hic-up. No noticable difference in noise but the truck would sort of jerk. When I downshifted to 4th at rapped it out, no jerk. This went on until I reached my destination. Driving around town, no problems.

On the return trip home I had the same problem. This time I also noticed it under hard acceleration trying to merge into traffic. Whenever I tried to go uphill, same thing. The problem became more frequent the longer I traveled.

Now driving arount town, no problem. Placing any sort of load on the drivetrain, the jerky hic-up happens.

Things I have tried: Code Reader-No Failures, replaced gas, fuel filter, utilized 2 doses of fuel injector cleaner, new spark plugs, new wires.

Any ideas?
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Old 03-17-2012
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Join Date: Feb 2012
Location: Windsor, WI
Posts: 93
Quote:
Originally Posted by kendawg View Post
2003 Ranger,4 Cylinder, 2WD-72,000 miles

I was making an 800 mile drive recently and noticed a strange problem WHen cruising at highway speeds and going uphill the truck would sort of hic-up. No noticable difference in noise but the truck would sort of jerk. When I downshifted to 4th at rapped it out, no jerk. This went on until I reached my destination. Driving around town, no problems.

On the return trip home I had the same problem. This time I also noticed it under hard acceleration trying to merge into traffic. Whenever I tried to go uphill, same thing. The problem became more frequent the longer I traveled.

Now driving arount town, no problem. Placing any sort of load on the drivetrain, the jerky hic-up happens.

Things I have tried: Code Reader-No Failures, replaced gas, fuel filter, utilized 2 doses of fuel injector cleaner, new spark plugs, new wires.

Any ideas?
I would try hooking up a fuel pressure tester so can take it for a drive and put a load on it, secure it to a windshield wiper, etc and observe while driving.
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