Engine surging / erratic idle / studderring
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Engine surging / erratic idle / studderring
My 2002 F250 7.3 is having some probs. when I start the truck, the engine surges from 1500 RPMs to about 500. If I push on the gas and keep RPMs constant for about 10 seconds, when I let go it will steady the RPMs but when I drive it is rough and studders and hard shifts till the engine gets to operating temps. I just changed out the glow plug relay and that improved the studderring but now I have the surging issue. Truck has 270,000 on it and I just got it so not too sure what all has been done
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The erratic idle just started but the engine studderring has been going on for a bit. The Lucas oil was to he fully help with the studderring. Thought there might be some build up on a lifter or something internal that may be causing the studderring issue. How do I check icp or ipr? Nut seems tight on the ipr. Will change filter but it is less than 2000 miles old.
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