After replacing the power steering pump there was a low idle, idle screw is all out, running rich, and idle speed doesn’t change.
My engine is running too rich with a low idle rpm. I adjusted idle screw almost all the way out. I replaced power steering pump and issue got worse. I haven't been able to adjust my timing properly because idle speed doesn't change when I jumper te1 and e1. tested tps seems ok. ordered a new o2 sensor. maybe bad vacuum hoses somewhere?
My car has a manual transmission.
My car has a manual transmission.
Experienced mechanics share their insights in answering this question :
Hi there. The engine has a vacuum leak and is causing the engine to stumble down on the idle. Check all of the vacuum hoses and the brake booster for any leaks. The engine is rich for it’s not burning all of the fuel properly and may also have bad spark plugs. If you need further assistance with engine not adjusting the idle, then seek out a professional, such as one from Your Mechanic, to help you.
How to Identify and Fix Common car Problems ?
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If your powertrain control computer is misreading idle speeds, this can cause a high idling malfunction. When your car`s throttle is malfunctioning, this can cause your car to stall or idle high. Often this is a result of dirt buildup in the air intake. Other times it can be a problem with a cracked intake tube.
Disconnect the idle air adjustment valve by locating and disengaging the electronic connector that holds it to the throttle body. Turn the idle screw to adjust the idle—turn the screw to the left to increase the RPM or to the right to lower it.
Causes of a rough idle. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues.
Engine hunting and surging at idle is usually caused by a fuel delivery, air leak, or governor system problem. Cleaning/overhauling the carburettor, adjustment of the governor, and/or changing the air filer may be required.
On a fuel injected motor, a vacuum leak can cause the engine`s RPM at idle to increase. In fact, it`s possible to double the idle speed if the leak is significant enough. When a vacuum leak is detected, the O2 sensors on the engine will detect extra oxygen is entering the intake manifold.
Bad Idle Control Valve
It`s meant to communicate with the vehicle`s ECU and control airflow when you`re idling. So, when wear and tear get to this component, a disruption in information exchange happens. IAC can`t function properly, resulting in higher RPMs and fluctuations.
An idle air control valve, also called an idle air sensor control motor, is an electrically operated valve that controls the amount of air that bypasses the throttle plate in cars with a fuel injection system [source: Autozone]. This causes the idling speed of the engine to change as needed.
For regular cars, idle speed is typically between 600 and 1,000 rpm, just enough to keep the engine`s ancillary systems going, but not enough to move the car forward much.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
Engine Misfires
Perhaps the single most common cause of rough idle comes in the form of a misfiring engine. As you may know, any automotive engine contains multiple cylinders. Each of these cylinders contributes to powering your car by combusting a mixture of gasoline and air.
A broken vacuum hose near the power steering pump deteriorates and can cause a rough idle and the check engine light to illuminate.
If the vacuum leak is steady, your RPMs will be unusually high. Keep an eye on your vehicle`s tachometer to see where your RPMs are at, and if they are registering higher than normal, you probably have a vacuum leak in the engine that is causing this problem.
Vacuum Leaks Can Make Your Idle Rough and Sporadic
A vacuum leak introduces excess air into the engine, and this throws off the balance of the air and fuel. One problem that occurs because of this is a rough idle that is also sporadic.
Oxygen (O2) sensor
An oxygen sensor monitors and analyzes the amount of oxygen in a vehicle`s exhaust system after combustion. A dirty, damaged or malfunctioning O2 sensor (or sensors) affects the air/fuel mixture, causing the engine to idle rough.
Improperly functioning spark plugs cause an uneven burn of fuel in the engine, resulting in fluctuating RPMs and a louder noise. You might also experience increased vibrations of your vehicle while sitting idle or while traveling at low speeds.
If your engine revs up as you press down on the gas but your vehicle doesn`t accelerate as much as you`d expect, you may be dealing with transmission slipping. If you`ve ever tried to accelerate on ice, where your engine revs but your vehicle goes nowhere, you know the feeling.
Function. The functional objective for the crankshaft position sensor is to determine the position and/or rotational speed (RPM) of the crank. Engine Control Units use the information transmitted by the sensor to control parameters such as ignition timing and fuel injection timing.
What`s the average RPM? A modern passenger car cruising down the highway, in top gear, could be running somewhere between 1500rpm and 2000rpm at 100km/h. And a diesel ute idles around 750rpm while in sixth gear sits around 2000rpm for 110km/h. Most of today`s road-going petrol engines can rev out to around 6000rpm.
High RPM – Idle speed is measured in revolutions per minute (RPM). For most 2 liter and below sized engines the vehicles, the standard idle speed should be around 750 RPM (when the engine is warm). If your car`s RPM is above 900 with a warm engine while idling, it is likely using too much fuel.
Generally, the average car stays at about 2500 rpm while doing 70mph.
A few things I would check are the throttle body, the idle air control valve, and the vacuum hoses. A dirty throttle body or idle air control valve can cause the idle to fluctuate. I would also examine the condition of all of the vacuum hoses, any cracked or leaking hoses can cause the idle to fluctuate as well.
Cut your engine when you stop for more than 60 seconds. The estimated fuel consumption of an idling engine is 0.6 litres / hr per litre of engine displacement.
If you hear a hissing sound from the engine, it is time to get your vehicle looked at. The PCV valve hose may have a leak in it, which is causing the hissing sound. Leaving this for too long can cause misfires, rough running, vacuum leaks and you will have a more extensive repair on your hands.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
After replacing the power steering pump there was a low idle, idle screw is all out, running rich, and idle speed doesn’t change.
ANSWER : Hi there. The engine has a vacuum leak and is causing the engine to stumble down on the idle. Check all of the vacuum hoses and the brake booster for any leaks. The engine is rich for it’s not burning all of the fuel properly and may also have bad spark plugs. If you need further assistance with engine not adjusting the idle, then seek out a professional, such as one from Your Mechanic, to help you.
Power steering pump on 2012 Acura TL needs to be replaced. Due to location a power bar also needs to be replaced. Cost over $3,000. Is this a good price?
ANSWER : Question sent to CS for a quote on replacing the power steering motor, programming, and replacing an electrical component attached to the motor. This is in comparison to a quote that was given for the parts and labor.
The power steering pump seal keeps breaking when pump is replaced.
ANSWER : There may be a restriction in the power steering high pressure line causing an excessively high amount of pressure in the line and the pump. If the belt tensioner for the power steering belt is a manual tensioner that can be adjusted, the tension may be too tight causing a high load on the bearings at the power steering pump drive shaft. You can try having the power steering system flushed to see if this will clear any blockages and be sure to use an OEM quality power steering pump as some aftermarket components are not manufactured as well as the originals. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer inspection of the vehicle in order to offer a more personal diagnosis if your power steering concerns.
had power steering pump replaced but power steering fluid is leaking
ANSWER : This suggests that you may have a leak somewhere else in your power steering system such as one of the hoses or the rack and pinion system. As you may know, the power steering system is a highly pressurized system that can have as much as 300+psi of pressure in the system at times, so it is not uncommon for these types of leaks to happen. If you’d like to get this fixed, I would recommend having an expert from YourMechanic come to your location to diagnose the leak in your power steering system and make the the necessary repairs to fix it.
Chrysler 3.8 L. T&C power steering rack and pump replacement.
ANSWER : As you may know, the power steering rack pumps power steering fluid through a series of small reed valves that help to produce hydraulic pressure as the system is pressurized by the pump. This is what allows the power steering system to assist you in steering your car. When either the pump or the rack is not working properly, one or the other can sometimes over compensate for the other to a certain degree, but will eventually be overworked and fail. It sounds like this may have been the case in your situation. I would suggest having a second opinion on the previous mechanic’s work. If you’d like a professional from YourMechanic can come to your home or place of business to properly diagnose and repair your power steering system.
Power steering is hard, softens when I accelerate
ANSWER : Well given the symptoms, it sounds like the power steering pump is not putting out adequate pressure. When you replaced the power steering pump, did you use an OEM pump? If not, I would suggest having the power steering pressure checked, and replace the pump with an OEM pump if necessary to ensure the pump is good quality. Also, I know you said the pipes have been replaced, but does that include the pressure hose between the pump and the steering box? If not, that could be an issue as well.
You should also check the front end steering and suspension components, as a failing steering rod or ball joint could be binding, causing the steering to be stiff until it has enough pressure to overcome the bind.
If you want to have the steering problem thoroughly diagnosed, you can contact a qualified professional, such as one from YourMechanic.
Cranks and runs rough have to keep foot in gas to keep running. Has new fuel pump and died while driving after pump was changed
ANSWER : Check fuel pressure. There are only three possible explanations: a fault in fuel supply (plugged filter, injectors, etc.); ignition system problems; and air induction including the idle air control valve, throttle position sensor, mass air flow sensor and vacuum leaks including the PCV and EGR systems. If obvious, and easy to check, possibilities do not reveal the fault, the recommended service to request is a rough running diagnostic and the responding certified mechanic will travel right to your location and get this diagnosed and resolved for you. It is also possible that diagnostic trouble codes have set and the mechanic will attempt to retrieve those using an appropriate scan tool. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.
Gm I need a power steering pump or should I get power steering fluid? I have leaks coming out what should I do
ANSWER : If the power steering pump is leaking then you should replace the pump since it is under pressure and no stop leak will stop it from leaking.
