Skip the auto shop - Our mechanics make house calls

Q: Van idles high - 1993 Ford E-150 Econoline Club Wagon

asked by on

My van is idling very high. It ranges from 2800-3100 RPMs. I tried repairing many parts but the problem remained the same. For instance, I replaced the valve cover gasket, throttle body gasket, wires and coil, spark plugs and distributor cap. Also, the idle air control gasket is new as well as the upper intake gasket had a leak. I tried removing the idle air control and the RPMs would drop to a normal range. I figured that it needs to be replaced, but after plugging a new IAC, there was no improvement. I tested the IAC and it's been getting good voltage. I checked for vacuum leaks and there are none. What else can I do to fix this?

A: You need to disconnect the throttle cable f...

You need to disconnect the throttle cable from the throttle body to see if the idle comes down. If it does, you may have a misadjusted transmission downshift cable which is holding the throttle body open. If it still idles high then you may have a problem with the throttle body itself or the throttle position sensor. Have the vehicle scanned to see if there is any key on engine off and key on engine running codes. It should indicate a problem code to be diagnosed. If you would like, a certified technician from YourMechanic can come to your home or office, diagnose your idling issues and make necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Replacing the water pump using and using a gasket sealer

What you want to do is get a good sealer (silicon or any other type) and put it on a gasket on the inside. Then you put the gasket on a pump. Then let it sit for a half an...

Q: My Rpms start to go up like crazy and seems to lose power when I'm at WOT

In many cases, the symptoms you're describing are related to a blockage in the fuel delivery system; perhaps the fuel injectors or the throttle body itself. Over time, carbon builds up inside the throttle body and the [fuel injectors]((https://www.yourmechanic.com/article/what-causes-fuel-injectors-to-get-clogged-or-dirty) which...

Q: Car loses rpms when idling and dies when not giving it gas on first run.

Hello. It may be a problem with the choke on the carburetor. Try some carburetor cleaner in and around the carburetor, especially the choke plate. On a cold start no matter the temperature, the choke plate should be mostly closed....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.