Question about Ford Thunderbird

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High idle sensor problems

My 1987 ford thunderbird idles too high...what could be the problem?

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  • dan lincoln May 05, 2013

    IS THIS T-BIRD A 5.0 CFI? OR AN EFI? OR A 3.8? OR A 2.3. THE CARBURATED ONES HAD TO HAVE THEIR CHOKE CAP HEATED BY 1/2 BATT VOLTS FROM THE ALTERNATOR. OTHER CALIBRATIONS HAD OTHER PROBLEMS. CAN YOU PROVIDE THE REST OF THE REQUIRED INFO?

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ALTERNATOR MUST BE WORKING. CHOKE CAP MUST NOT HAVE AN OPEN CIRCUIT. THROTTLE LINKAGE MUST NOT BE HELD UP. HARNESS TESTS SHOULD BE PERFORMED BEFORE CONDEMNING THE ALTERNATOR. ALTERNATOR LIGHT MUST WORK DURING BULB PROVEOUT AT STARTUP ELIMINATE VACUUM LEAKS AND CARB ICING BY AIRCLEANR PREHEAT INOP. THERES A FEW THINGS TO LOOK AT

Posted on May 04, 2013

  • dan lincoln May 04, 2013

    ALTERNATOR MUST BE WORKING. CHOKE CAP MUST NOT HAVE AN OPEN CIRCUIT. THROTTLE LINKAGE MUST NOT BE HELD UP. HARNESS TESTS SHOULD BE PERFORMED BEFORE CONDEMNING THE ALTERNATOR. ALTERNATOR LIGHT MUST WORK DURING BULB PROVEOUT AT STARTUP ELIMINATE VACUUM LEAKS AND CARB ICING BY AIRCLEANR PREHEAT INOP. THERES A FEW THINGS TO LOOK AT

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Asumming it did not do this before, and suddenly started, have you also noticed a loss of power at very low speeds? This could be caused by a vacuum leak, One of the little rubber hoses that attach around the carburetta or intake manifold may be disconnected from dry rot, cracked, stretched out etc. You likely will need to remove the air filter housing. Look around for a loose skinny hose and where it may have popped off. Somtimes you can trim the tip off and reconnect it, but they are cheap for a short section to replace, from any auto parts store. Take old one with, to check size.

Posted on May 04, 2013

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: Check engine light is on and high idle (1500rpm)

Check for a vacuum leak.

Posted on Feb 03, 2009

  • 398 Answers

SOURCE: high idle speed on 1987 ford F150

it may be this or the ( pcv valve ) pcv get clogged alot on old fords.The idle air control valve (IAC) control the engine idle speed and dashpot functions. The valve is located on the throttlebody . This valve allows air to bypass the throttle plate. The amount of air is determined by the Powertrain Control Module (PCM) and controlled by a duty cycle signal.

TESTING

  1. Make sure the ignition key is OFF.
  2. Disconnect the air control valve.
  3. Use an ohmmeter to measure the resistance between the terminals of the valve solenoid.
Due to the diode in the solenoid, place the ohmmeter positive lead on the VPWR pin and the negative lead on the ISC pin.
  1. If the resistance is not 7-13 ohms replace the air control valve.

Posted on Mar 27, 2009

  • 6 Answers

SOURCE: High Idle

I have a 2001 Nissan Altima and mine did the same thing. We replaced the intake gasket. It costs around $5.50, but it requires several different kinds of tools. We spent over $100 in special sockets, etc. But once you replace that gasket, it will idle better.

Posted on May 14, 2009

  • 534 Answers

SOURCE: 1987 bmw 325 idles rough

I had a similar problem on a 318IS.
The rough idling was accompanied by an occasional whistling noise from the general engine area (caused by air leaks through the front and rear crankshaft oil seals).

The problem was caused by a faulty crankcase ventilation valve (Costs about $100).
The vent valve is easy to replace - (2 screws) - check the vacuum hose that connects this valve back to the tappet cover air vent nipple - it goes soggy and disintegrates.- replace with suitable oil resistant vacuum hose.
While on the job, clean the throttle body / butterfly valve internally with a soft toothbrush dipped in petrol. This cleans off sooty deposits - makes engine idle rpm more consistant.

Posted on Jun 04, 2009

pippall
  • 1486 Answers

SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

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