Mechanics

RUN HIGH RPMS AND THEN DROPS

1993 Honda Accord • 180,000 miles

I have a 93 Honda accord that I have noticed recently likes to run high rpms and then drops just to go high again over and over repeatedly. Sometimes it will shift and I can let off the gas and it will continue to go the same speed with the high rpms, I try to slow day and it yanks. Can you tell me the problem?
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Beautiful_nightmare424
February 5, 2012.




Check the fuel pressure and also look for vacuum leak-

Go to this link: http://www.2carpros.com/articles/engine-surges

Tiny
Rasmataz
Feb 5, 2012.
Ensure you have sufficient coolant in system. Check the cold start valve for sticking and ensure coolant hoses to the IAC and cold start valve are not clogged.

Check the idle adjust screw and ensure it has not worked itself loose.
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KHLow2008
Feb 5, 2012.

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