Hestitation at high speeds/high revs

1988 Views 10 Replies 6 Participants Last post by bfivelover, Oct 25, 2005

Chip Walker

Discussion Starter · Oct 21, 2005

My Insight has 63,000 miles. At speeds above 70, the vehicle hiccups, revs drop slightly and then it passes. Has anyone else experienced this problem and what was the solution. I am also concerned about low mpg. On a recent 650 mile mixed use drive I am getting below 50 mpg.

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hawkGT647

· #3 · Oct 21, 2005

If you have a 5-speed, it's possible that you are on the verge of lean burn, which does cause a change in power.
70+ mph is probably at the upper end where lean burn is available, and also may be the reason for the low mpg.

Another possibility is the egr valve acting up, which has been discussed before on the forum.

Regards,

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