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Jerry
Jerry, Master Mechanic
Category: Cadillac
Satisfied Customers: 17015
Experience:  ASE Master tech, 30 years experience
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98 Cadillac concourse deville 4.6 Ltr : when coming to a

Customer Question

98 Cadillac concourse deville 4.6 Ltr : when coming to a stop engine wants to stall if I don't keep pressure on accelerator , putting it in neutral or pressure on brake
JA: Whether it's at the end of the driveway or on the highway, a car stalling can be dangerous. The good news is the mechanics we work with have tons of experience dealing with all kinds of engine issues. How old is the battery? Does the car stall out mainly when going up or down hills?
Customer: only stalls when coming to a full stop , battery is new
JA: Got it. I'll pass this info along to the mechanic so that he can get you a quick fix. Are you hoping to fix this yourself?
Customer: yes
JA: Great! What have you tried so far?
Customer: changed pvc valves and spark plugs
JA: Is there anything else important you think the Cadillac Mechanic should know about your Cadillac?
Customer: some time it sounds like my heater is farting and I smell anti freeze , other than than that she runs fine at 75 or 80 mph
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Cadillac Mechanic about your situation and then connect you two.
Submitted: 6 months ago.
Category: Cadillac
Expert:  Jerry replied 6 months ago.

Hello. My name is ***** ***** I will be happy to assist you today.

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Let me start by saying that any money that you paid, or if you have a subscription, that money stays in your account until the answers are rated, (positive) regardless of how fast or how long it may take to get finished. You can FOLLOW UP AT ANYTIME, even after rating.

That could be an idle air control problem or just dirt in the air passages in the throttle body.

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However,

You will want to do a throttle body cleaning on it to make sure that all of the idle air passages are clear of any carbon build up.

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You can pick up a can of “throttle body cleaner” just about anywhere auto parts are sold.

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You can normally follow the directions on the can but I always spray some in the intake while the throttle plate is closed to be sure that it gets into all of the passages. You don’t want to use carb cleaner though, as it’s not safe for the 02 sensors.

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Also, you want to be sure that there are no vacuum leaks and that the intake air hose is on good and free of any cracks.

Please don’t forget to rate the answer, **** THAT IS THE ONLY WAY I GET PAID **** if you need any more on it, I will be here.

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Expert:  Jerry replied 6 months ago.

If you accept my additional service request for your email address, you can give me your email in a private info box and I'll send you the instructions in a PDF file, the file is rather large.

You will just have to accept the additional service offer and ENTER your email address in the “ENTER CONTACT INFO” section so that I can see it.

I do not have access to your email address,

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