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Showing results for tags 'stumble'.
Hi all. I dont want to think about it but my Deville has developed a stumble. Or miss. I will elaborate. It will only do it on cold startup. about 6 months ago I thought I felt a miss on startup. was gone in seconds. About 3 months ago same thing Last week started to feel it almost daily. When the car sat for 3 days it stumbled for 1.5 blocks. I got right on it and it definately stumbled. The stumble only lasts a very short time. No codes. no other problems at all. I would like to not think about it but the dreaded HG beginning stages comes to mind. I really hope not as this car is my main 4 season vehicle. and with winter coming I need it. Anyone have any insight on this. Thanks. I only run premium fuel. Chevron treatment every 6 months. I drive it hard. Coolant temps are perfect. I use WOT generously and it takes every bit of it with no spikes in temperature. Everything is well maintained. fuel filter is about 1 year old miles are 197000