2002 Kia Rio rxvautomatic

Tiny
AL CAPONE
  • 2002 KIA RIO
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 81,200 MILES

2002 Kia Rio RXV automatic.
This car at low idle, almost stalls runs with a random misfire, poor intake vacuum. Air box all good. Off idle, runs fine. Compression all good, fuel injectors all good, new plugs, wires, even new intake gaskets. Camshaft timing ok, fuel filter, air filter new, fuel pressure 50 psi.
Check engine light-DTC 1166, P 300 misfire. The o2 sensors are fine.
Help? Not sure what else it could be.

Do you
have the same problem?
Yes
No
Thursday, May 12th, 2011 AT 3:16 PM

4 Replies

Tiny
DOCFIXIT
  • EXPERT
  • 18,990 POSTS

Suspect intake vacuum leak possible faulty Surge tank what is vacuum at idle?See diagram check all for leaks spray carb cleaner when hits leak idle will improve

Was this
answer
helpful?
Yes
No
Thursday, May 12th, 2011 AT 3:52 PM
Tiny
AL CAPONE
  • MEMBER

Thanks for responding Docfixit.
At start up, vacuum is 7 inches. Rev up once, it is 20 inches. Tried the carb cleaner, no luck.
In park, when you step on brakes, lose all vacuum, then rev up vacuum returns on brakes and runs fine. Can not find a vacuum leak, which this has. Surge tank, not sure where this is located, if it is on the right hand side of fire wall with two lines going in and electrical on the bottom, we have checked this. If this is the EVAP problem would a EVAP code come up?
Assuming, is there a valve in the vacuum system, and if so a schematic of the vacuum system?
Thanks.

Was this
answer
helpful?
Yes
No
Thursday, May 12th, 2011 AT 4:57 PM
Tiny
DOCFIXIT
  • EXPERT
  • 18,990 POSTS

Diagram did not load try again

Was this
answer
helpful?
Yes
No
Thursday, May 12th, 2011 AT 5:18 PM
Tiny
AL CAPONE
  • MEMBER

THANK YOU SO MUCH. We will have a look at this diagram.

Was this
answer
helpful?
Yes
No
Thursday, May 12th, 2011 AT 5:43 PM

Please login or register to post a reply.

Other Cabin Filter Questions