1998 Honda Civic idle speed unstable

1998 HONDA CIVIC
122,000 MILES • 4 CYL • 2WD • AUTOMATIC
Avatar
MINHLE3345
  • MEMBER
  • 1 POST
My honda 1998 civic EX is 122k miles. at newtral the idle jump from 1000 to 1500 repeatedy. when drving at 35 to 45 ,the engine shake alot, after 45 it is nomal. on thr high way when i go about 70, the idle drop and jump back again on and offu until i accelerate a little more. Then the problem start all over again. I don't fell smooth driving at all. Please tell me what i need to fix. Thanks a lots...
Oct 28, 2008 at 7:07 PM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the fuel pressure/idle air control valve/TPS and MAP sensors also the EGR valve
Oct 28, 2008 at 7:34 PM
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 Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.