When the car is cold or hasn't been started over night you have to give it a little gas to keep it running for a minute or two... After that it runs fine and will start every time no problem once u drive it for a little while... Runs like a dream... Doesn't sputter no misfire...This is the only problem.. No check engine light
Another thought.
Try cycling the ignition switch several times on and off before you crank it, see if it helps? If it does, check for fuel issue. Just a thought. Sometimes when vehicle sits for a while, the fuel pressure drains back.
Fault codes will reveal a problem ambient air temp or atmospheric pressure sensor(BARO) fault
these units report to the ECM so that the correct air/fuel ratio can be obtained
The same as pulling on the old choke
SOURCE: 1999 cadillac deville hard starting after its drove
TPS throttle position sensor needs cleaning or replacment. or if you run the tank low on fuel you might be needing to replace fuel pump and filter.
SOURCE: 88 Cadillac Deville cooling fan runs continuously
I have a 1990 Cadillac Fleetwood and the cooling fans will not shut off....what is the problem?
SOURCE: Cadillac Deville 2000- Engine check light code P0741
If you like go ahead and let someone sell and replace your transmission but here is my suggestion! Check around and see if you can find a minor vacuum leak! This can simply be the big round hose that goes from the fuel injection to the power brake hub! This is normally a push in connector which has about a 1/2 inch hose clamped on it! If there is any kink or the connector is not in correctly a leak will occur and the transmission will shift rough as though you will be thrown out of the vehicle! Try unplugging this connector and plug it back in hard and straight and maybe you will be lucky and fix your problem. If the vacuum is correct your transmission will shift better than you have ever experienced!
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