Why is my car idling funny?

1993 HONDA ACCORD
214,000 MILES
Avatar
THANVAS
  • MEMBER
  • 46 POSTS
After doing the head gasket, my car is idling funny when I decelerate. The needle starts to go down to 1000rpm then it jumps up to 1200rpm then drops down again to 1000rpm then to slowly down to 800rpm. Also my check engine light is on, it wasn't on before. What would be causing this?
Jun 21, 2012 at 7:00 PM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
first, need the code.

check the coolant level as it directly effects the idle condition.

it could be a vacuum leak, idle air control and these had issues with egr valves not seating

Roy
Jun 21, 2012 at 7:05 PM
Avatar
THANVAS
  • MEMBER
  • 46 POSTS
Hi Roy,

I checked the code and it's 43 (fuel system). The car was running normal before I did the head, so I don't think something has gone out. If I have a vacuum leak would my idle rpm be higher than normal? My car's idle is at 800rpm, just like before the change of head gasket. Three days ago I had a problem with the car not having power even after I stepped on the pedal, but it seems like that problem has gone away. It's just idling abnormal and it also seems like the car is eating more gas than before. Besides these problems the car runs pretty nice. Also if I didn't have a problem with the EGV valve before what would cause it to have problems now?
Jun 23, 2012 at 9:04 PM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Check the valve clearances. Incorrect adjustment can cause this.
Jun 24, 2012 at 7:39 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle