Slight surge at idle when cold
Thread Starter
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Fleet Mechanic
Joined: Aug 2005
Posts: 1,689
Likes: 29
Slight surge at idle when cold
So i have noticed my truck has developed some sort of very small surge at idle when its cold. Doesnt matter if its 24 or 50 that i can tell. When its idling, the needle and engine will randomly surge maybe one tach 'tick' mark, usually less than that. After 5 mins or so, it goes away. Its barely noticable unless you watch the tach. Is this normal or a sign of something heading out sensor wise? 31,000 miles on the odo.
Thread Starter
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Fleet Mechanic
Joined: Aug 2005
Posts: 1,689
Likes: 29
Im going to check the sensor and pigtail. Upon further looking, im not convinced its actually a problem and not normal. I can't say for sure if it never did it before. Its such a slight surge so i dont know.
Senior User
Joined: Sep 2003
Posts: 330
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Power Service TEMORARILY clears mine up too. But if I run straight diesel for more than a tank or so, the idle surge come right back.
Cold weather seems worse but it has done it in warm weather also.
Mine also seems to stumble or miss at idle if surging. Seems as if a cylinder is missing...like a gasser with a dirty plug.
I'm thinking bad injector(s)'
Once hot it's fine and pulls good with plenty of power.
Sound familiar to anyone?
Cold weather seems worse but it has done it in warm weather also.
Mine also seems to stumble or miss at idle if surging. Seems as if a cylinder is missing...like a gasser with a dirty plug.
I'm thinking bad injector(s)'
Once hot it's fine and pulls good with plenty of power.
Sound familiar to anyone?
