1990 Cadillac SeVille Logo
Posted on May 20, 2011
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1990 seville quits running once foot is off gas pedal. Have to use both feet when driving, one for gas the other for braking. Starts fine and as long as foot is on gas pedal (when running of course) it won't stall out. Help!

1 Answer

honeymokey

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  • Master 3,113 Answers
  • Posted on Jul 03, 2011
honeymokey
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Sounds like the ISC motor is bad.

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Any Idea's ?

It half sounds like a problem with the safety switch for the starter lockout. On a stick shift it may be on the clutch pedal but is on the brake pedal for automatics. This assures that your foot is on the brake pedal so the vehicle does not lurch when you start it.

This would show up in the restarting process, but it is intended to lock out the starter and would not interfere with an engine that is already running. So to keep the engine running feathering would not have anything to do with the starter lockout.
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Car wont stay started unless foot on gas pedal

This could be a lot of things. IT could be the injectors or the fuel pump pressure, it could be the air intake, vacuum leak, etc.
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For this problem, i suggest you to go through this help links.Click the link below to go through the troubleshooting procedure :----Car Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html
-----------Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
---------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
-----------This will help.Thanks.
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Car shut down when foot not on the accelerator

For this types of problem,there are few help links.I suggest you to click the link below and go through the troubleshooting procedure :-----Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html-----------Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
----------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
----------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
--------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
-------------Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html----------This will help.Thanks.
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How to change fuel filter 1990 Cadillac deville

Get car on a lift as the filter is under car close to where your gas pedal foot may rest. Two open end wrenches will take it apart.
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MY 2001 SEVILLE STS SHAKES WHEN ITS IDLING, APPEARS AS THOUGH ITS

I just bought the same car, theres no skipping in the tranny, but your right the car will go for a while once you take your foot off the petal, I looked at that as saving gas in a way, because your crusing and not stepping on the gas.
quick question has your battery ever died? if so how long did it take to reste the sensors?
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Car keeps stalling

sounds like the idle speed control valve may be defective.
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