Q: 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.
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.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Head gaskets failed how likely is it to happen again?
Hello! Thank you for writing in with this question. The design of the “boxer” engine makes for a high probability of head gasket problems. Coolant and oil drainage isn’t like typical “V” or inline style engines, so coolant and oil...
After fuel pump & filter replacements, car won't start
Hello there, I'll be happy to assist you! The problem is likely within the VATS (Vehicle Anti-Theft System) of the vehicle. More specifically the issue you are having is generally caused by broken sensor inside of the ignition lock cylinder...
Car won't go into gear ocassionally, 1990 Porsche 944
Hi there, thanks for writing in about your 1990 Porsche 944. A severely worn clutch will cause slippage and the vehicle will not move. Another common concern is the linkage between the shifter and transmission assembly. The cable and the...
Car exhaust shake
The exhaust shaking may be related to many things such as loose mounting bolts or potentially a clogged catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement). The popping and cutting out suggests potentially a lean fuel condition which means the car is starving for fuel...
Stalling, misfiring, and erratic idle - 1995 Chevrolet K1500
Stalling and rough idling are usually an indication that the motor is not able to adjust to varying loads. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum...
My service air bag system light is on is this dangerous
Hello, thank you for writing in. The airbag light can illuminate for several reasons. Some of them are more serious than others, but it still is not something to take too lightly. Chrysler is infamous for electrical issues, and that...
ESC light is staying on.
Hi There, Your ESC light represents the Electronic Stability Control system in your car, otherwise known as a form of traction control. As you may know, this system is controlled by a series of sensors located at each of the...
Everytime I turn my steering wheel it makes a loud popping sound near my tires.
It is possible that loose suspension components such as tie rods (https://www.yourmechanic.com/services/tie-rod-end-replacement) or ball joints (https://www.yourmechanic.com/services/ball-joint-front-replacement) could cause this issue. I would recommend having a suspension inspection (https://www.yourmechanic.com/services/brakes-steering-and-suspension-inspection) performed to determine the exact cause of this issue. Consider YourMechanic as...
What's the difference between idle control valve and auxiliary idle air control valve
The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle's computer and will adjust...
Related articles
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...
The Best Used Cars to Buy for Towing Light Loads
Towing Towing is tricky business and depending on the weight you’re dealing with, it really determines what vehicle is best for you. If it’s light loads you’re looking at towing, we’ve put together a list of the top five cars...
How to Find the Source of a Coolant Leak Faster and More Accurately
Keeping a good coolant level in your car is necessary to avoid overheating. If you think there is a leak, find where it's coming from to fix it.
Browse other content
Maintenance
Estimates