Question about 2004 Cadillac Deville
My 2004 Caddy Deville engine started racing as high as 2000 RPM at a stop light last week and yesterday the engine stalled out while I was driving slowly into a parking spot. The problem has gotten worse over the past week. Any ideas out there on what's causing this problem and how to fix it? Thanks.....
Is your check engine light on while your driving? If it is get a hold of a scran tool to find out what codes are showing.Or most auto parts supply stores have one end will check it for codes, Most of them don,t charge to check it out for you.
Posted on Oct 26, 2012
I am no mechanic, let me make that clear, but I have rebuilt and fixed more vehicles over 30 years , so I have a little input. You should try looking at your EGR valve(exhaust gas Recirculating valve) this silly 200$ piece controls idle, rpm and it does what it says, it puts back lean exhaust gases into system so they reburn for cleaner emissions. Problem is when it starts crapping out unless you keep foot on accelerator it either wont start or RPM drop to zero. Hope this is helpful.
Posted on Dec 07, 2012
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Posted on Jan 02, 2017
SOURCE: My 1993 cadillac deville feels
The error is indicating that the Throttle Position Sensor (TPS) is out of the normal range with respect to the Idle Speed Control (ISC). Try something really simple and inexpensive first by removing the air ducting between the air filter box and the throttle body. Clean the throttle body interior and throttle plate with a cloth sprayed with WD40. Turn the throttle plate by pushing it at the top with your fingers and clean the throttle throat behind the plate as best you can. Reassemble the ducting and ensure that there are no air leaks at the junctions and no splits. Turn the key to position 2 (engine not running) and depress the accelerator pedal to the floor and then back up again. Start the car and nine times out of ten that should fix it. The TPS measures the opening angle of the throttle plate. The TPS is device consisting of a circular carbon track with a slider, corresponding to the throttle plate, sweeping along it. It as three wires to it, two to provide the 0 to 5 volt range along the length of the carbon track and the third to measure the voltage at the contact point of the slider. To check the TPS measure the voltage of the middle pin of the connector when the ignition is at position 2 (engine off) as you push the throttle plate open and closed by pressing on the accelerator pedal. The voltage should alter in a smooth continuous way. Any drop outs of signal indicate a worn carbon track and the TPS should be replaced.
Posted on May 09, 2011
I have a 95 eldorado that is starting hard and idling rough. Also noticed gas pedal fluctuating. I have been told it is the Fuel Pressure Regulator. Does that sound reasonable?
Posted on Jul 09, 2010
The idel motor has gears in it that wear out. Just like the other answer, the failure will turn on the check engine light and with a check engine problem the cruise will not engage. no matter what the check engine light is on for. If your handy with tools the idel motor can be taken apart and a new gear kit can be installed and put it back in. You can also but the complete unit but their not cheep.19160423 Manufacturer: ACDELCO PROFESSIONAL Grand Blanc, MI 800-223-3526This part cost $78 at my local auto parts store and they have it in stock.
Posted on Aug 11, 2011
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