first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve and check the pintle inside the valve ports for excessive carbon deposits clean the valve ports and pintle with carburetor cleaner and replace the valve if idle does not improve replace the isc valve with a new one.
tell me about ideal air control valve
you can do so by backprobing the iac or buy the idle speed
This website can tell you where it is and how to check it http://www.ford-trucks.com/article/idx/0/170/article/Ford_Explorer_IAC_Fix.html
Could you please tell me if a 1997 Chevy Venture has a heater control valve and if possible the location of the valve.
Lots of Monte questions! This is a question with a easy answer for a difficult reason. The idle speed on any 1995 to 2001 Monte Carlo is handled by a thing called the Idle Air Control(IAC) valve. What the valve does is regulate the amount of air that bypasses the throttle plate. The IAC valve is controlled by the Powertrain Control Module(PMC). The PMC is the black box we often called the cars "computer". The IAC valve can be checked with an ohmmeter and is either good or bad. The valve can't be adjusted nor can you mechanically adjust the engine's idle. The PMC also knows what's going on with your catalytic converter because it can read the O2 sensors and match that with other engine data. Long before the catalytic converter were to actually get "stopped up" the PMC would tell the "check engine light" to start yelling at you from it's location in the dash.
The IAC is a small motor on the throttle body that screws a giant needle valve ("pintle") up and down. It regulates how much air is allowed to bypass the closed throttle plate, thereby controlling the idle speed. It moves up for example when you turn the a/c on, to kick it from the usual 900 to 1100 rpms. It's movement is controlled by the PCM (powertrain control module), to maintain the desired idle speed. There is not much to the throttle body... the throttle plate itself, the IAC motor (idle air control), attachments for vacuum lines, and a TP (throttle position) sensor to tell the computer what percentage the throttle is open.
go to autozone for a free diagnostic check & the computer will tell you what is wrong ie map sensor. idel air control . mass airflow sensor
EFI cars dictate idle through direct output from the ECU, based on information it gains from the coil, engine temp (block sensor), cam revs (sensor) and throttle position sensor (on the throttle, a potentiometer usually). Idle is actually controlled by the ECU based on that info through a throttle bypass solenoid valve. This valve can get dirty and you can tell if there is a fault if the idle does not change on engine load (like when the aircon goes on). Take the valve off and clean it. The TPS sensor can go wrong also as the ECU then does not know what the throttle is doing. Hope that helps
Check for a sticking or dirty throttle plate, and the IAC or the Idle air control valve.
sorry to tell you buddy but the i.a.c ( idle air control valve ) you killed it you never want to spry anything on that part of the electronic fuel system go buy you a new one and reset the memory by removing your posisssstive battery cable for about a minute and i would just about bet it works just fine after ! i only know because i did it myself some time ago. Good luck BIG J W
The output speed sensor tell the computer what speed the trans output is turning to know when to shift.
can you tell me if this problem is with a idle air valves control on this Cadillac Seville sls 1996
i don know p1508 plaese tell me what is that
My Honda, in good running condition, idles at 700 RPM This is what it idled when it was new. For the 1989 Honda your idle speed should be between 750-1000 RPM and if you have any questions look under your hood and it will tell you right there.
your vehicle will shut down when driving. it will start again off the key it will do this at idle , any speed and with no warning
You will feel a miss at idle and the idle speed may be erratic. Try retorquing the intake manifold bolts, working from the center out in the recommended tightening sequence. If that fails, the intake manifold will have to be removed and the intake gaskets replaced
first, inspect the idle air control valve for carbon build up. if it is dirty, you may remove it to clean it, (which i did), or use seafoam. a dirty iacv can dramatically effect idle. the idle on your subie is set by the electronic control module and even a subie mech will tell you there is no adjustment. however, and this is not recommended by any mechanic. on the iacv there are two mounting screws that can be turned to make adjustment to the amount of air flow at idle. the iacv is preset at the factory and is not supposed to be touched there after. ive read people who have done it and had no problems at all. i would try both of these suggestions in their respective order before spending the enormous amount of money on a subie mech or replacement of the iacv.
I would try oxygen sensor but you need to put it on the machine which will tell you for sure. good luck
You can tell a bad valve by doing a compression test.
You do not say which engine it is, But if its 1.8 or 2.0 ecotech engine, it might need the Idle Control Valve cleaning I had the same problem, sometimes when slowing down for a corner or junction it would cut out.
If they're spring brakes, you won't be able to get them to release. The brake chambers won't actuate when you push on the treadle valve (brake pedal), the brake control valve won't remain pressed in.
IN MOST CASES THE VEHICLE, WHEN COLD, WILL START BUT NOT STAY ALIVE, BUT A CODE SHOULD ALSO BE GENERATED ON THE POWERTRAIN CONTROL MODULE. A GOOD CLUE THAT IT'S WORKING IS IF THE IDLE GOES UP TO AROUND 2,000 RPMS THEN GRADUALLY DECREASES DOWN TO AROUND 700-750 RPMS DURING A COLD MORNING START.
If you have a throttle body, you might want to check the IAC motor (idle air control). If it is malfunctioning it won't tell the computer to raise the idle air to compensate for the addtional load on the engine. It's located on the throttle body. Additionally, if you turn your front wheels and get the same results or if your idle doesn't lower after the engine is warmed up is another way to tell it's bad or needs to be cleaned (and look at it's seat in the body).
no you cant
Modulating Valve ???? If you can tell me what system this valve would be in I can tell you the correct name for it and its location. example IPR valve in the high pressure oil system.