Question about 1993 Cadillac DeVille

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I recently installed a fuel pump on a 1993 cadillac deville. i also changed the filter,emission control,plugs and wires. it fired up and ran for about 14 minutes. it ran very sluggishly then quit. i have been unable to restart it since.

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Was it the correct fuel pump with the propper psi?
have you checked you wires to make sure none got crossed. are the spark plugs propperly gapped?

Posted on Mar 07, 2009

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Hi I own a 1990 Cadillac Deville 4.5 MPI recently the catalictic converter became clogged so I removed it replacing it with a straight pipe then it ran like **** so replaced spark plugs checked contin


First I should warn:: straight pipe can get you in trouble with the law. But what has happened is your car uses a o2 sensor to monitor the flow of air in the system. By removing the converter you have disrupted the flow and now the engine computer is receiving the wrong readings and telling the fuel system to enrich causing spark plugs to fowl. You will have to return the balance to correct the problem or change the chip in the computer.

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Where is the fuel filter on a 1993 cadillac sedan deville i need to change it


Since we are limited in the amount of space we can use, I will have to give you a link to the step by step instructions.

http://www.ehow.com/how_6190439_change-filter-1993-cadillac-deville.html

Sep 14, 2011 | 1993 Cadillac DeVille

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1993 deville 4.9 missing at idle and intermittant missing at speed. Has new wiring harness new plugs, new ignition coil etc


CHANGE FUEL FILTER AND CLEAN FUEL INJECTORS,CLOGGED FUEL INJECTORS WILL CAUSE ENGINE TO MISS, MAKE SURE SPARK PLUG GAP IS 0.060, LEAN MISFIRE FROM WEAK FUEL PUMP,CHECK FUEL PRESSURE SHOULD BE 40 - 50 PSI. IF EVEVY THING CHECK OUT OKAY,MISSING PROBLEM COULD BE LOW CYLINDER COMPRESSION OR INTAKE MANIFOLD AIR LEAKS.DO A COMPRESSION TEST IF NECESSARY.

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1 Answer

1993 cadillac deville when i start it it dies unless i push the gas its not fuel pump or filter i just replaced them


It could be the throttle position sensor, mass air flow or map sensor, weak fuel injector, bad spark plugs, or a number of other issues. If the check engine light is on, getting it pulled may further direct you. Goodluck.

Mar 27, 2011 | 1993 Cadillac DeVille

1 Answer

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that light means that your engine ran sertain miles and needs to be tune-up, oil , filter, air element spark plugs/wires fuel filter. or tranny needs the tune up. or a problem with the emission control oxygen sensors etc................ hook a scanner from autozone and check it out or deleted the light with it. its free at autozone thell you borrow one. hope this hepls you

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1 Answer

I am having problem with my 1993 Cadillac DeVille. It begins to shudder and shake while driving or stopped in traffic almost to the point of losing all acceleration. This problem seems to come and go...


Not fuel related...
The engine is losing ignition timing.
It sounds like the ECM (Electronic control module). It is responsible for ignition timing.
Inspect it / replac eit.

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1 Answer

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if the filter is not backwards try to replace the fuel pump.

Mar 10, 2009 | 1993 Cadillac DeVille

1 Answer

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first all i do all of the repairs on my cars and i have got a bad fuel pump once but i would like for you to checkout all of the wire and make sure they are right and after make sure the fuel pump relay is good and the fuse for the sending is good

Feb 12, 2009 | 1996 Cadillac DeVille

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