idling in drive

[accordex_1990]

I have a problem. When I was driving to day and stopped at a light my car started to idle pretty bad. (the rpm neddle kept going up and down). The strange thing was i was in drive when it was doing it, usually ity does it in park. What do you guys think the problem is. A new sensor maybe. Appreciate the help

Peace

Car: 1990 Honda Accord EX 4dr

[Maple50175]

I think there is another thread on this use the search

[91accord4door]

but sounds to me like a vacume leak,and it could also be your fast idle valve,check that clean it,theres a diy on cleaning it that accordztech made.but check all vacume lines.good luck.maple gotta help out a little better than that.

[accordex_1990]

idling in drive

Thanks for all the feedback. I will check the vacuum tubes tommorow. Thanks again

[91accord4door]

no problem,check the ones that go to the black control box located on the passenger side firewall,and the ones coming out of the intake/throttle body!good luck.

[accordex_1990]

idling in drive

Now that I think about it, would this idling problwem have anything to do with me recently putting in pulleys, a fuel pressure regulator and a fuel rail? Thanks

[accordex_1990]

idling in drive

Got the problem fixed. Turned out there was a hole in my filter for my intake and it was sucking in to much air. Thanks again for all the help.