Question about 1990 Nissan Pathfinder

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I have a nissan terrano 1990 td27 engine and i would like to know

What sensor opens the throttle butterfly on the intake manifold. it is controlled by a vacume diaphram which is given vacume from a vacume block on the drivers side behind the battery i need to know what controls the solinoid inside the vacume block thank you most frustrated

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5 Suggested Answers

BlackOnyx
  • 102 Answers

SOURCE: nissan terrano 1996 td27 charging issue.

Did you hear the one about the Terrano with a charging problem?
Just fix it by replacing the thermostat!
Seriously - check your temperature gauge does it take ages for the needle to barely get off cold? (and is the heater useless?)
The needle should get to just below half way in 2 or 3 minutes.
If the thermostat is stuck open, then the engine does not get up to temperature.
The glow plug control senses the engine temperature is cold, so the glow plugs stay on for an extended period of time (sometimes 10 to 15 minutes) - short trips particularly in winter, with more headlight driving - the alternator can't keep up with the current being drawn off and from time to time you will end up with a flat battery!
A thermostat is cheap, and easy to replace (three bolts and about a half litre of coolant - I pumped the coolant from the top of the radiator, and didn't spill a drop when the thermostat housing was removed).
Sure enough, as the engine temperature reached about 50C, the glow plugs turned off.

Posted on Jul 21, 2009

  • 216 Answers

SOURCE: no vacum from manifold to egr .1990 chevy truck

check for vaccum from throttle body to egr solenoid,if you dont have vaccum your vaccum port is stopped up in the throttle body,then check for vaccum from solenoid to egr valve.

Posted on Feb 02, 2011

  • 4 Answers

SOURCE: Intake Manifold choke diaphram for 98 ford windstar

no you need the vacum hose that is what keeps persure on the acc.

Posted on Nov 10, 2008

dj_ricko_198
  • 128 Answers

SOURCE: 2001 altima engine idle

what about the motor idle ????
pleas let me know what you want to know

Posted on Dec 28, 2008

  • 73 Answers

SOURCE: my son changed the intake gasket and manifold and

Sounds like either the intake is still leaking or your head gaskets are gone too. Are you certain it's gas also?

Posted on Nov 24, 2010

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2004 ford f 150 5.4 3V pulled intake fixed vac hose came off replaced imrc & still show intake runner control closed bank 1 Still has no power when I get in it to pass something any ideas?


Is your check engine light on ? Any codes ?

There are three basic types of intake air sub-systems:


  • Intake Manifold Runner Control (IMRC) electric actuated system

  • Intake Manifold Swirl Control (IMSC) vacuum actuated system

  • Intake Manifold Tuning Valve (IMTV)

These subsystems are used to provide increased intake airflow to improve torque, emissions and performance. The overall quantity of air metered to the engine is controlled by the throttle body.

Intake Manifold Runner Control (IMRC) Electric Actuated System
The Intake Manifold Runner Control (IMRC) Electric Actuated system (Figure 107) consists of a remote mounted motorized actuator with an attaching cable for each housing on each bank. Some applications will use one cable for both banks. The cable or linkage attaches to the housing butterfly plate levers. The 2.0L (2V) Focus IMRC uses a motorized actuator mounted directly to a single housing without the use of a cable. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always open and the other is opened and closed with a butterfly valve plate. The housing uses a return spring to hold the butterfly valve plates closed. The motorized actuator houses an internal switch or switches, depending on the application, to provide feedback to the PCM indicating cable and butterfly valve plate position.



Below approximately 3000 rpm, the motorized actuator will not be energized. This will allow the cable to fully extend and the butterfly valve plates to remain closed. Above approximately 3000 rpm, the motorized actuator will be energized. The attaching cable will pull the butterfly valve plates into the open position. Some vehicles will activate the IMRC near 1500 rpm.



WARNING: SUBSTANTIAL OPENING AND CLOSING TORQUE IS APPLIED BY THIS SYSTEM. TO PREVENT INJURY, BE CAREFUL TO KEEP FINGERS AWAY FROM LEVER MECHANISMS WHEN ACTUATED.




  1. The PCM uses the TP sensor and CKP signals to determine activation of the IMRC system. There must be a positive change in voltage from the TP sensor along with the increase in rpm to open the valve plates.




  1. The PCM uses the information from the input signals to control the IMRC motorized actuator based upon rpm and changes in throttle position.




  1. The PCM energizes the actuator to pull the butterfly plates open with the cable(s) or linkage.




  1. The IMRC housing contains butterfly plates to allow increased air flow.

Jun 29, 2015 | Ford Cars & Trucks

2 Answers

Over reving


Can be a number of things (check all of these):

  1. Stuck throttle linkage or accelerator pedal;
  2. Loose butterfly on throttle body;
  3. Stuck or malfunctioning idle air controller;
  4. Loose or damaged throttle body or bad throttle body gasket;
  5. Cracked intake manifold or bad intake manifold gasket;
  6. Bad ignition control module.

Jun 24, 2014 | 1994 Eagle Summit

1 Answer

Authomatic nissan terrano model 2006 td27


You will need to have the transmission removed to access the torque converter. A new torque converter should fix things unless debris from the damage has spread throughout the trans, in which case a strip down of the trans is the way to go...or a new/secondhand trans is installed.......

Mar 29, 2014 | 2005 Nissan Terrano 2.7

1 Answer

Nissan terrano TD27 diesel. Hard starting while the engine is still hot.


What year? Electronic controls of injection pump or mechanical?
what type of smoke comes out of tailpipe when trying to start when hot? How do you eventually get it to restart?

Oct 26, 2013 | Nissan Terrano Cars & Trucks

1 Answer

1990 honda accord surges at idle, what can cause this?


It is likely a vacuum leak (from a hose or the intake manifold), or a sensor is not working properly (like the throttle position sensor, MAF sensor, idle air control ).
Spray carburetor cleaner around suspect areas to find a vacuum leak. The spray will be sucked into engine and raise idle. Spray around the intake manifold where it mates to head for leaks there.
Also check for trouble codes. Maybe a sensor threw a trouble code.
Good luck.

Nov 30, 2011 | 1990 Honda Accord

2 Answers

I have a 1997 Nissan Mistral which goes off on idle speed and engine ckeck light goes on at times


ok, in Nissan they use MAF sensors to measure air intake volume. if it is broken it cant idle correctly(or if you have crack on intake manifolt or a torn part in hoses after maf sensor it cant idle). if you have a scanner or acces to scanner please scan for code.

before sdcanning please spray some brake pad cleaner to engine bay from differnt angles and try to realize sound and vibraitonchanges on engine. if you catch anything, this means there is a vacuum leak and it is getting excess air. you need to fix crack by glueing or replacing part.

Nov 22, 2011 | Cars & Trucks

2 Answers

I have a 2002 Ford Ranger 3.0L Edge. I had a basic tune up done (spark plugs, MAF sensor, fuel and air filters, plug wires, cleaned IAC sensor, replace a bad PVC elbow to intake, etc.). My truck run...


The "IAC" is not a sensor. IAC stands for Idle Air Control - it is an electric solenoid. These are not supposed to be "cleaned". If someone cleaned it, that is most likely your problem. You will most likely have to replace the IAC and get the engine to idle correctly so it will not stall at stops. This is a common problem for Ford 3.0L engines even if the IAC has not been cleaned.

Apr 10, 2011 | Ford Ranger Cars & Trucks

2 Answers

Nissan Quest 2001 turns off when idle


Idle air control at base of throttle body. Passages could be plugged or idle hard stop needs adjusting.

Air Intake System Sensors Air intake system sensors include a heated resistor-type mass air flow (MAF) sensor and throttle position (TP) sensor; both supply data to the powertrain control module (PCM). The PCM also monitors engine speed.
Air Intake System Control Devices The idle air control (IAC) solenoid regulates idle speed by adjusting the amount of air allowed into the intake manifold. Adjustment is made by varying the duty cycle output by the powertrain control module (PCM). The PCM will increase the duty cycle for added mechanical or electrical loads. The IAC solenoid is combined with the fast idle control (FIC) solenoid which is turned on when the air conditioner is engaged to help compensate for the additional load. The IAC valve must be replaced as an assembly with the FIC solenoid.
Fast Idle Control (FIC) Solenoid The fast idle control (FIC) solenoid (Figure 1) compensates for idle speed change caused by the operation of the air conditioner compressor. The FIC solenoid is controlled by the FIC relay. The FIC relay is energized when the air conditioner clutch is energized and the relay allows the FIC solenoid to turn on and let an additional volume of air into the intake manifold.
Figure 1: Fast Idle Control (FIC) Solenoid
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Throttle Body (TB) The throttle body (TB) controls the amount of air that flows into the engine through a single butterfly valve. The single butterfly valve opening is determined by the accelerator pedal. The TB is cast with an air bypass channel and houses several emission-related components for the powertrain control module (PCM).
--------------------------------------------------------
Throttle Position Sensor (TP Sensor) The throttle position (TP) sensor responds to the accelerator pedal movement. The TP sensor is a potentiometer that transforms the throttle plate opening angle into output voltage and sends the voltage signal to the powertrain control module (PCM). In addition, the sensor detects the opening and closing speed of the throttle plate and sends the voltage signal to the PCM. Also, the TP sensor is used to determine the air intake when the mass air flow (MAF) sensor fails. This mode of operation is called Fail Safe.
The TP sensor integrates the idle (IDL) switch within the housing. The IDL switch detects when the throttle plate is closed and an idle condition occurs. The PCM is supplied with this input signal.

IDLE SPEED

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Apr 03, 2009 | 2001 Nissan Quest

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