Question about 1989 Chevrolet S-10 Blazer

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1989 S-10 Blazer that will run at high RPM with TPS & IAC unplugged have replaced all vacuum hoses ,rebuilt throttle body replaced all gaskets, no codes,replaced ECT

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Check air flow meter,in air filter line or box

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How to fix high idle have already Cleaned idle air control valve also Throttle body replaced all vacuum Lines and throttle body gasket.


Intake gaskets? IAC valve bad? MAR set too high? Computer failure? Wiring to IAC bad connections? TPS not set to spec?

Mar 05, 2016 | Cars & Trucks

1 Answer

Ok i unpluged my iac on my 93 chevy 5.7l at a warm idle and nothing happened. Is anything suposed to happen? My truck had a high idle when warm and a little rough idle when cold. And if im driving and...


Have you check for a vacuum leak? The 5.7 throttle body base gasket can get a crack in it and cause the running issues that the engine is having.Easy test is to plug the hole in the throttle body where the IAC draws air, if the idle slows down then suspect a vacuum leak.

Feb 25, 2015 | Cars & Trucks

1 Answer

My mr2 is idling too fast.i have tried all the obviousadjustments.is there some secret formula or adjustment screw im missing?i cleaned the throttlebody & the iac. adjusted the tps etc. any ideas?


Check all the small vacuum hoses for leakage or loos fit, check for damaged or broken air intake hose. Check if there is anything loos between throttle body and cylinder head, like broken gasket, craks or so. Idling is adjusted by the ECU and there are no screws anywhere. In most cases, lost vacuum is the reason for high rpm at idling. In some cases it's possible that an O2-Sensor or the cat is bad, and the ECU tries to adjust but get the wrong signals.

May 15, 2014 | Toyota MR2 Cars & Trucks

2 Answers

Where is throttle positioning sensor on a suzuki forenza


Removal & Installation
  1. Disconnect the negative battery cable.
  2. Disconnect the Intake Air Temperature (IAT) sensor connector.
  3. Disconnect the breather hose from the valve cover.
  4. Remove the air intake tube.
  5. Disconnect the throttle cables by opening the throttle and moving the cable through the release slot.
  6. Disconnect the vacuum hoses from the throttle body.
  7. Disconnect the Throttle Position (TP) sensor and the idle air control valve connectors.
  8. Disconnect the coolant hoses from the throttle body.
  9. Remove the throttle body and discard the gasket.
  10. Remove the TP sensor.
  11. Remove the Idle Air Control (IAC) valve.
  12. Remove the throttle body retaining nuts.
  13. Remove the throttle body.

To install:

  1. Install the throttle body.
  2. Connect the TP sensor connector and the IAC valve connector.
  3. Connect the coolant hoses to the throttle body.
  4. Connect the vacuum hoses to the throttle body.
  5. Connect the throttle cable.
  6. Install the air intake tube.
  7. Connect the breather hose to the valve cover.
  8. Connect the IAT sensor connector.
  9. Connect the negative battery cable.
  10. Fill the cooling system
  11. shinehutt_33.gif
  12. i hope this helps tps is attatched to hrottle body on other side than throttle cable
  13. plz dont forget to vote rep[ly if you need more help

Jan 17, 2011 | 2006 Suzuki Forenza

1 Answer

Have a 1996 Mitsubishi Galant and need intstuctions on how to replace the Idle Air Control Valve


You'll have to remove the throttle body to replace the idle air control (IAC) valve. First, disconnect the negative ground cable from the battery. Then remove the vacuum line and air duct intake. Then disconnect the IAC and throttle position sensor (TPS) electrical connections. Remove the coolant hoses that are connected to the IAC. Disconnect the throttle cable from the throttle body. Now, remove the 4 bolts that hold the throttle body to the manifold and remove. Be careful with the gasket located between the throttle body and manifold and replace it in the same position. On your clean work surface, turn the throttle body over and remove the 4 phillips head screws holding the IAC to the throttle body. Clean the parts with a dry cloth but do not use solvents on the IAC or TPS. That's it!

Dec 16, 2010 | 1998 Mitsubishi Galant

1 Answer

When i turn on heater or fan engine revs over 3000 rpm


Idle Air Control Valve Pintle may be bad If you disconnect the IAC and the problem ceases it can point to this being the problem.: Removal & Installation 3.5L Engine To Remove:
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove the fuel injector sight shield.
  3. Drain the cooling system.
  4. Remove or disconnect the following:
    • The air cleaner intake duct. Figure of IAC and TPS electrical connectors disconnected. aurora_g1.gif

    • The idle air control (IAC) valve and throttle position (TP) sensor electrical connectors. Figure of cruise control and throttle control cables removed from throttle lever. aurora_g2.gif

    • The cruise control cable and throttle control cable from the throttle body lever.
    • The fuel pressure regulator vacuum hose, positive crankcase ventilation (PCV) hose and the throttle body vacuum port hose.
    • The throttle body coolant hoses.
    • The throttle control cable bracket, leaving the throttle and cruise cables connected.
    • The upper nut holding the throttle body to the intake manifold.
    • The throttle body assembly.
  5. Clean the gasket mating surfaces.
To Install:
  1. Install a new gasket and new studs if necessary.
  2. Install or connect the following:
    • The throttle body assembly.
    • Start the top nut by hand.
    • The throttle body coolant hoses.
    • Position the throttle control cable bracket and hand start the retaining nuts and bolt.
    • Torque the three throttle body retaining nuts to 89 in.lbs. (10 Nm). And the bracket retaining bolt to 115 in.lbs. (13 Nm).
    • The throttle body vacuum port hose, PCV valve hose and the fuel pressure regulator hose.
    • The throttle control and cruise control cables to the throttle body lever.
    • The IAC valve and TP sensor electrical connectors.
    • The air intake duct.
  3. Refill the cooling system.
  4. Install the fuel injector sight shield.
4.0L Engine To Remove:
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable.
    • The Mass Air Flow (MAF) sensor electrical connector.
    • The air cleaner intake duct.
    • The PCV valve fresh air tube. Figure of cruise control cable removed from throttle cable bracket. aurora_g3.gif

    • The cruise control cable and throttle control cable from the bracket.
    • The cruise control cable and throttle control cable from throttle body lever. Figure of IAC valve and TPS connectors removed. aurora_g4.gif

    • The idle air control (IAC) valve and throttle position (TP) sensor electrical connectors. Figure of fuel lines removed from retainer on throttle cable bracket. aurora_g5.gif

    • The fuel feed and return lines from the retainer on the throttle control cable bracket.
    • The transaxle shift cable clip from the throttle control cable bracket. Figure of throttle body removed from water crossover. aurora_g6.gif

    • The throttle body from the water crossover.
To Install:
NOTE: The Mass Air Flow (MAF) sensor inlet and the outlet of the air cleaner assembly must line up when installed. Misalignment may cause MIL illumination or driveability concerns.
  1. Install or connect the following.
    • The throttle body to the water crossover. Torque the bolts to 106 in.lbs. (12 Nm).
    • The IAC valve and TP sensor electrical connectors.
    • The throttle and cruise control cables to the throttle body lever.
    • The throttle and cruise control cables to the throttle control cable bracket. The transaxle shift cable clip to the throttle control cable bracket.
    • The fuel feed and return line retainer to the throttle control cable bracket.
    • The MAF sensor electrical connector.
    • The air cleaner intake duct clamp. Torque the clamp to 27 in.lbs. (3Nm).
    • The PCV valve fresh air tube.
    • The fuel injector sight shield. Torque the nuts to 20 in.lbs. (2.3 Nm).
  2. Install the negative battery cable.
  3. Pressurize the fuel system and verify no leaks.
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Oct 07, 2010 | 2001 Oldsmobile Alero

1 Answer

I have a 1994 Chevy K1500 Blazer 5.7 V8 Throttle Body. Most of the time it runs decent but lately at about 2000 RPM it acts like its running out of gas. I rebuilt the throttle body. New IAC, new TPS new...


Check the PCM codes for faults. If you can not do that take it to AUTO ZONE and they will perform a free scan of the computer for you and tell you what the problem is and what the cost for parts are

Mar 31, 2010 | Chevrolet Blazer Cars & Trucks

2 Answers

1994 gmc pickup- starts but when you put it in gear it dies, give it gas it will run but not good


It sound like your idle air control (IAC) valve is dirty and the fuel injectors. Try cleaning the throttle body and IAC with throttle body cleaner, if it's really bad you may have to use two cans of throttle body cleaner to make sure you have all of the carbon and varnish cleaned out. If this does not help, then there is a good chance that the IAC has gone bad and needs to be replaced but also check the wire harness to the IAC and TPS on the throttle body. Good luck and hope this helps and it would not hurt to replace the fuel filter also.

Dec 15, 2009 | 1994 GMC Sierra

2 Answers

IDLING PROBLEMS ON 1992 ACCORD EX


Have the Idle Control Solenoid Valve cleaned up.

Or it might be defective. See steps below to check...
  1. Disconnect idle control solenoid valve electrical connector.
  2. Disconnect upper hose to solenoid valve from manifold and apply vacuum to hose. Valve should hold vacuum.
  3. Continue applying vacuum to hose and briefly energize valve by connecting battery positive terminal to the black/yellow wire terminal and negative battery terminal to the green/black wire terminal. Valve should not hold vacuum when energized.
  4. If idle control solenoid valve fails to perform as outlined, valve is defective.

Jun 03, 2009 | 1991 Honda Accord

1 Answer

87 chevy truck with TBI idles too fast


Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.

May 10, 2009 | 1987 Chevrolet R20

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