Q: High idling on a 1998 Cadillac Deville

asked by on

I've got a 1998 Cadillac Deville. The car runs well but randomly the outer shoots are way up and get stuck at 2400 RPM. I cleaned the throttle body, checked the throttle cabel, disconnected cruise, replaced IAC and TPS. Just can't fugure it out.

If it’s idling that high, something is really sticking there. You might check your throttle cable because it’s an old one. It’s not the modern one that has a drive-by wire with no throttle cable. Check the throttle cable as it could be sticking. The cable could also be frayed.

You can lubricate the cable just like a motorcycle cable. Get a spray lubrication and spray the lubrication inside the cable to keep it from sticking. You’ll want to make sure that the throttle itself isn’t worn. You said you cleaned it but sometimes when they get old, they warp and the throttle will stick in open positions. In that case, you’re going to have to buy a new throttle assembly. They cost a whole bunch of money so you might go to a junkyard for something like that. You may want to have a mechanic inspect your high engine idle in order to diagnose the problem and make the correct repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. High idling on a 1998 Cadillac Deville

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

Get a quote

What others are asking

Q: RPMs high while driving

The throttle control system is malfunctioning and would need to be tested for codes. The intake system should be checked for any vacuum leaks in the intake hoses. Once the Check Engine Light is tested the codes received will need...

Q: Starts but does not run for very long

I would recommend checking and cleaning your mass air flow sensor as this can cause a lean or rich fuel mixture when not working properly. With this happening, there should be a Check Engine Light on that would have registered...

Q: Q: Car shakes at 60 mph and over

In this case, you may need to have the wheels balanced on the vehicle if the tires have already been road force balanced. While tire balancing will result in a balanced tire and wheel assembly, it does not balance the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.