2001 Ford Ikon Engine Idling & Acceleration

Tiny
DEEKAYSAN
  • MEMBER
  • 2001 FORD IKON
  • 1.3L
  • 4 CYL
  • FWD
  • MANUAL
  • 6 MILES
Sir my car idles erratically, I was told to change it, hence went to the junkyard and brought 2 of them, I installed it, but still when I crank up the engine it's RPM rise to around 1800 RPM and within 5 seconds it returns to normal, the same happens whenever I click the peddle slightly, the RPM's hang on at 1800 RPM for 5 seconds and then back to normal, I am a DIY enthusiast and had been jugging around the engine but I am unable to find correct problem, sir please guide me to an accurate solution or solutions !
Saturday, July 5th, 2014 AT 11:16 AM

11 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
What did you replace?
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Saturday, July 5th, 2014 AT 6:37 PM
Tiny
DEEKAYSAN
  • MEMBER
  • 14 POSTS
Sir I replaced the IAC valve, it was told by a mechanic, but I think since they were brought from the junkyard they too seem to malfunctioning, sir guide me as to what the real fault is for bad idling & acceleration.
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Saturday, July 5th, 2014 AT 10:38 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Okay, the IAC, Idle Air Control valve, is responsible for maintaining engine idle speed. So that could be an issue. Also, have you checked for engine vacuum leaks? Did the IAC's that you replaced do the exact same thing? Has the check engine light come on or have you had the computer scanned for possible trouble codes?
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Sunday, July 6th, 2014 AT 2:18 PM
Tiny
DEEKAYSAN
  • MEMBER
  • 14 POSTS
No sir, all the IAC's work differently, the original one was not withstanding Air Conditioner load, & one of 2 bought from junkyard is atleast supporting AC.
I did'nt got any OBD scan done.
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Sunday, July 6th, 2014 AT 8:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Since you are getting different results from the used ones, I think you are on the right track. I would try a new one. Also, if the check engine light is on, have the computer scanned to see what codes are stored.
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Monday, July 7th, 2014 AT 7:53 PM
Tiny
DEEKAYSAN
  • MEMBER
  • 14 POSTS
Sir, I am unable to find a check engine light on my dash, I think it's not there, sir, may I buy a bluetooth obd 2 device for doing diagnostics myself, is that device feasible enough for correct diagnostics? I will buy a new IAC Valve from A.S.S. C, can there be any other reasons for acceleration problems?
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Tuesday, July 8th, 2014 AT 3:19 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I never saw a scanner that worked from a blue tooth. As far as a scanner, yes you can purchase them. As far as the engine idle speed, the IAC is most likely the issue. However, it really doesn't play a role with acceleration. When you turn the key on (engine off), do you see the check engine light? It should come on.

I'm sorry I don't have a fail safe answer for you, but not being there makes it hard. Hope you understand.
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Tuesday, July 8th, 2014 AT 6:39 PM
Tiny
DEEKAYSAN
  • MEMBER
  • 14 POSTS
Thank you for those wonderful replies, I will definately change the IAC Valve with a new one and then will update the result here by replying,
Sir actually my dash has few lighting problems I think that's why the MIL is not indicating.
Yes of course I understand it. Thank you once again. Will update shortly.
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Tuesday, July 8th, 2014 AT 8:22 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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I look forward to your reply.
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Wednesday, July 9th, 2014 AT 8:50 PM
Tiny
DEEKAYSAN
  • MEMBER
  • 14 POSTS
Could the clogged fuel injectors be the reason for erratic high Idle RPM? Bcoz too leans out the fuel ratio.& How many vacuum hoses are there in a normal passenger car?
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Monday, July 21st, 2014 AT 12:17 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
A lean condition can be caused by a plugged fuel injector, low fuel pump pressure, and most commonly, a vacuum leak. There are several on the vehicle. Normally, I can get a vacuum schematic for you, but this car doesn't exist in N. America. Therefore, I have no specifics on it.
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Monday, July 21st, 2014 AT 6:05 PM

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