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1995 CADILLAC SEVILLE HAD CODE P080 REPLACED IDLE AIR CONTROL-- IDLE SERGES PULLED PLENTIUM DID NOT FIND A VACCUUM LEAK ANY WHERE STILL HAS CODE P080

P080 CODE NO VACCUUM LEAK AND REPLACED IAC

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6ya6ya
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Posted on Jan 02, 2017

  • 35 Answers

SOURCE: Rough Idle 2000 ford Taurus OHV

This could be a bad a/c compressor or compressor pulley bearing.Try removing the serpentine belt and turning the compressor by itself.The bearing should turn very easily,and the compressor itself should turn.If it is vety hard to turn,it is bad.

Posted on Sep 25, 2008

  • 1 Answer

SOURCE: Very High Idle speed

no prob not and i had the exact same problem and bought the part from advance auto it was like $80 and it's a diy thing i'm an 18 year old female and could do it my self just need the part and 6 star screw driver...it's right there on the right side when you open the hood

Posted on Mar 17, 2010

  • 30 Answers

SOURCE: 1995 Eagle Talon Will not start

check the mass air flow sensor, if this is bad then the ecu wont get a signal and it wont send the right amount of fuel to the cylinders causing a no start condition

Posted on Mar 19, 2010

HondaCRX
  • 252 Answers

SOURCE: 1998 subaru rs impreza 2.5

Hi

Usually a vacuum leak will make the idle bog down rather than speed up, even if the ECU is compensating. It will be rough, but as you say, it's fine through the revs.

This leads me to think the PCV (postive crankcase valve) is not connected or is leaking. This raises the idle, although the ECU will suspect the IAC to be the problem. Check the PCV valve first.

Check the MAF sensor for dirt too.

Another point to make is the throttle body might be clogged/dirty. Get the intake manifold off again and clean it with petrol/carb cleaner and a toothbrush, check the condition of the rubber seals, if they are gunked up, the air speed will increase, causing a high idle. Check the exhaust manifolds for any build up/rust.

Finally, when were the O2 sensors last changed? If recently, are they the right way around? If not recently, try those, but make this the last resort as they can cost a lot.

I hope I have covered every eventuality as I can see how annoying this is for you. As you already mentioned, reset the ECu after each attempt.

Good luck, fire any questions back if you need.

Posted on Jul 18, 2010

kapishtech
  • 2272 Answers

SOURCE: 1995 EAGLE TALON ESI 2.L,

Both the error codes mentioned are related to your problem.

Get both the things checked.

If checked faulty replace the faulty part

Code 25..... Idle Air Control (IAC) motor circuits. A shorted condition is detected in one or more of the IAC motor circuits.

So first check the IAC .

The Idle Air Control Valve motor is bolted onto the throttle body . Its tan or black in color, and takes two screw to take out. Check the IAC valve motor (OK means idle speed fluctuates or motor sound can be heard). If no, check the idle air control motor circuit. If yes, check the throttle body minimum air flow.

Poor connection at PCM or IAC motor. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
Damaged harness. Inspect the wiring harness for damage.
Restricted air intake system. Check for a possible collapsed air intake duct, restricted air filter element, or foreign objects blocking the air intake system.
Throttle body. Check for objects blocking the IAC passage or throttle bore, excessive deposits in the IAC passage and on the IAC spindle, and excessive deposits in the throttle bore and on the throttle plate. Check for a sticking throttle plate. Also inspect the IAC passage for deposits or objects which will not allow the IAC spindle to fully extend. If all checked ok then replace the IAC.
You can unplug the IAC or even remove it from the throttle body and plug up the whole and see if the problem goes away. In most cases the IAc needs to be replaced.

Code 11..... Intermittent loss of crankshaft and/or camshaft position sensor signals to PCM, complete loss of crankshaft position sensor signal to PCM, or timing belt skipped one or more teeth.

The crank positioning sensor is located on the oppisite side of the block as the timing belt.

The camshaft sensor You should remove the top timing belt cover and see it.

Check under the INTAKE cam gear. The plugs for it should be right around there as well. There's a black rectangular one and a grey triangle one.. I believe the grey one is the cam sensor.

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Sep 25, 2010

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1 Answer

Cleaned throttle body on chevy 03 1500. Now has high idle about 1200 rpm and surges up and down?


Hi.

Check the following in order:

IAC valve wiring, connectors and vacuum hoses.
Look for vacuum hoses that are not connected in general.
EGR valve wiring, connectors and vacuum hoses.
PCV system.
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Check position of the air intake for leaks. Tighten its screws.
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If the car idles up and down there may be an air leak from air intake or IAC, EGR, there may be a vaccuum leak or PCV system may be malfunctioning. Those are the things to check first and with more attention.

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P0455


This code indicates a large leak in the EVAP system ( Vaccuum Leak ) you will have to locate a broken vaccuum line or check EVAP canister for a leak or crack. You can also take it to a garage that has a smoke machine and what they do is hook the machine up to your EVAP system it blows white smoke in and it will come out at the point where it is broken or leaking.It might be worth the money to have this done because it can be a nightmare to find a vaccuum leak and this way it only takes about 10 seconds and they usually don't charge much for this test.

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I have a 2002 ford taurus. check engine light is on. Auto Zone did a scan today and the error code was p1507 can you please tell me what i need to do to fix this problem.


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open or short
air inlet plugged

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