IACV code

AHMEDKASHIF

MEMBER
2001 HONDA CITY
80,000 MILES

Hi there, problem is high stagnant and fluctuating rpms up to 2500 rpm and black smoke at the exhaust, firstly I replaced couple of throttle bodies but was of no use then my mechanic suggested to investigate more so the codes were checked and it said I guess IACV code then he changed the MAP sensor on the throttle body, but again it was of no use then he checked the vacuum where the MAP sensor is located, it was ok, then he checked the wiring from the main cpu to the map sensor and it was all found ok, then he changed the ECU of the car and replaced the MAP sensor with another one and the car was fixed, he ran the code checks on the ecu again and there were no codes. Now just after running for 50km this early morning while I started my car the rpm again started fluctuating and black smoke at the rear.

What should I do more.

4 Replies

HMAC300

MECHANIC
48,601 POSTS

Check fuel pressure and clean the throttle plate on both sides. First. Checkfor a vacuum leak.

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Tuesday, May 21st, 2013 AT 6:57 AM

AHMEDKASHIF

MEMBER
60 POSTS

Throttle body was disassembled, was clean thoroughly with the spray, there only one vacuum pipe which is ok and the fuel pressure is also alright, MAP sensor were again changed but no use, when the throttle body was checked the shutter was jammed, after cleaning the throttle body it was not stucking, problem still there, what next?