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CaddyInfo.com Cadillac Discussion Forum > General Cadillac Help and Discussion > Cadillac Discussion Forum |
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 Nov 8 2009, 09:13 PM
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#1
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Lurker (1-2 posts)  Group: Registered Posts: 1 Joined: 8-November 09 Member No.: 12650 94 Sedan Deville 4.9L OHV V8  |
I'm having an issue with my 94 Cadillac Sedan Deville where when I hit the gas it hesitates. I'm not sure if it is not getting enough gas or airflow. Any ideas what might be the problem and what I should do?
Also, several times the power will cut on and off at first (exa: It'll cut on and off several times for a couple seconds before it finally kicks in). I've been told the problem could be the fuel pump, the vacuum, or my C20 censor. I just had an idle speed control motor put on, a throttle body position sensor and gasket, and my combustion chamber cleaned. We all benefit from shared knowledge, and we would love to have you participate fully. Registration is free. As a Registered Reader you can Post, Reply, Search, and more! |
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Nov 8 2009, 09:16 PM
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#2
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 Cadillac Lover  Group: CaddyInfo.com Staff Posts: 15818 Joined: 19-November 05 From: Long Island, NY Member No.: 2998 96 Deville 119k Miles Northstar 4.6L V8 (LD8/L37) |
You have an on board diagnostic computer, you need to check for DTC codes, and post them here. Go to the top of this page, click how to, then DTC codes and follow the directions on how to pull the codes for your year and post them here
-------------------- I realize that I am in fact BIASED, but that is why I am an Enthusiast!
Increases of temperature are human-caused. Decreases are nature-caused |
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Nov 8 2009, 09:32 PM
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#3
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 CaddyInfo.com  Group: Admin Posts: 9253 Joined: 19-January 04 From: Plano, TX Member No.: 3 2005 CTS 3.6L 3.6L V6 VVT (LY7) |
Mike's right the diagnostic trouble codes may show what the issue is. http://www.caddyinfo.com/readingcodes.html
The CO2 sensor would be the O2 (oxygen) sensor, of which your car has 4. -------------------- Bruce
www.caddyinfo.com Caddyinfo on Twitter  2005 CTS 3.6L Light Platinum/Light Neutral, Corsa cat-back; Volant CAI. Next: FE4 Swaybars, Wood Steering wheel install |
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Nov 8 2009, 10:02 PM
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#4
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 CaddyInfo Enthusiast Group: Supporter Posts: 3472 Joined: 7-February 04 From: MA Member No.: 312 1995 Fleetwood Brougham 87.XXX miles 5.7L OHV V8 |
QUOTE (Streetz @ Nov 8 2009, 11:13 PM)  I'm having an issue with my 94 Cadillac Sedan Deville where when I hit the gas it hesitates. I'm not sure if it is not getting enough gas or airflow. Any ideas what might be the problem and what I should do? Also, several times the power will cut on and off at first (exa: It'll cut on and off several times for a couple seconds before it finally kicks in). I've been told the problem could be the fuel pump, the vacuum, or my C20 censor. I just had an idle speed control motor put on, a throttle body position sensor and gasket, and my combustion chamber cleaned. As BBF said, pull the trouble code. Did you have the symptoms before you replaced ISC motor, throttle position sensor etc.? Vacuum leak, bad TPS and many other things can cause hesitation. -------------------- The saddest thing in life is wasted talent
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Nov 8 2009, 10:10 PM
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#5
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CaddyInfo Enthusiast Group: Supporter Posts: 3472 Joined: 7-February 04 From: MA Member No.: 312 1995 Fleetwood Brougham 87.XXX miles 5.7L OHV V8 |
QUOTE (Bruce from Caddyinfo.com @ Nov 8 2009, 11:32 PM) Mike's right the diagnostic trouble codes may show what the issue is. http://www.caddyinfo.com/readingcodes.html The CO2 sensor would be the O2 (oxygen) sensor, of which your car has 4. Bruce, it is 4.9 liter, so I believe there should be two oxygen sensors. -------------------- The saddest thing in life is wasted talent
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Nov 8 2009, 10:53 PM
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#6
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CaddyInfo.com Group: Admin Posts: 9253 Joined: 19-January 04 From: Plano, TX Member No.: 3 2005 CTS 3.6L 3.6L V6 VVT (LY7) |
woops, I agree, 2.
-------------------- Bruce
www.caddyinfo.com Caddyinfo on Twitter 2005 CTS 3.6L Light Platinum/Light Neutral, Corsa cat-back; Volant CAI. Next: FE4 Swaybars, Wood Steering wheel install |
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Nov 9 2009, 07:24 PM
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#7
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CaddyInfo Oldtimer Group: Supporter Posts: 8141 Joined: 19-January 04 From: Woodstock, Illinois Member No.: 9 White Diamond '03 DHS Northstar 4.6L V8 (LD8/L37) |
Also check your fuel pressure.
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