txlizerd Posted June 28, 2007 Report Share Posted June 28, 2007 93 deville was running fine and just died ,will not restart ,no odd sounds or odd smells,code e31 is only code showing. Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted June 28, 2007 Report Share Posted June 28, 2007 E31 Shorted MAP Sensor Signal MAP = manifold absolute pressure sensor I don't think that would keep it from starting however. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
MAC Posted June 28, 2007 Report Share Posted June 28, 2007 E31 Shorted MAP Sensor Signal MAP = manifold absolute pressure sensor I don't think that would keep it from starting however. Actually, a MAP sensor can prevent it from starting. I know of a thread (I forget where I saw it) where a mechanic was looking for answers as to why his friends car wouldn't start. When he replaced the MAP sensor--problem solved. Link to comment Share on other sites More sharing options...
txlizerd Posted June 28, 2007 Author Report Share Posted June 28, 2007 what about tps sensor,the car started again maybe 3 sec. then died, then just turns over,thats the second time its done that since my first post about a hour ago.before this no problems what so ever. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted June 28, 2007 Report Share Posted June 28, 2007 A bad TPS would throw a code. The MAP is inexpensive and can be changed in a few minutes. Also, there is a possibility that the cable is crimped in the engine cover or some such. I would go after the MAP and, if I found a wiring issue on the way in, I would try it before I took the old one off. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
joeb Posted June 28, 2007 Report Share Posted June 28, 2007 cranks but no start? check fuel and spark. electric fuel pumps like to die. and its always away from home. Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 28, 2007 Report Share Posted June 28, 2007 Connect a fuel pressure gage and turn the key on see if you have fuel pressure. Also have someone turn the key on when you have your ear near the tank and see if you hear the pump cycle on for a few seconds Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Ranger Posted June 28, 2007 Report Share Posted June 28, 2007 Or remove the filler cap, place your ear next to it and have someone turn the key on, but do not crank. You should hear the fuel pump run for 2-3 seconds. If not, rap the relay with the handle of a screwdriver just to be sure it is not stuck open. Link to comment Share on other sites More sharing options...
txlizerd Posted June 29, 2007 Author Report Share Posted June 29, 2007 checked fuel pump ,yes i could here it. did replace the fuel cut off valve hose i think thats what that was , but that wasn't it . where is the map sensor ? I thought it was on top of the engine on the backside,two wire plug with a vacum hose. Link to comment Share on other sites More sharing options...
Ranger Posted June 29, 2007 Report Share Posted June 29, 2007 Not positive, but I think on the '93 it may be inside the manifold. Link to comment Share on other sites More sharing options...
MAC Posted June 29, 2007 Report Share Posted June 29, 2007 My bet is on the MAP sensor. Link to comment Share on other sites More sharing options...
txlizerd Posted July 1, 2007 Author Report Share Posted July 1, 2007 replaced the map sensor , checked for spark or fire but have nothing .fuel system seems to be working. Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 1, 2007 Report Share Posted July 1, 2007 replaced the map sensor , checked for spark or fire but have nothing .fuel system seems to be working. You have NO spark? Check the ignition module under the coils for grounds, the four connectors, etc.. You might need an ignition module if you have no spark. How did you determine you have no spark, check all coils Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
txlizerd Posted July 1, 2007 Author Report Share Posted July 1, 2007 the redneck way screwdriver and sparkplug wire , can you still do it that way ? Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 1, 2007 Report Share Posted July 1, 2007 the redneck way screwdriver and sparkplug wire , can you still do it that way ? Yes you can do it that way, just keep the spark from arching near any electronics.. So you have NO spark in ALL coils, yes or no? Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
txlizerd Posted July 1, 2007 Author Report Share Posted July 1, 2007 i really don't know ,i just chkd the #1 WIRE and noticed no spark and then jumped on the computer and started searching forums.. i don't know much about coil packs. Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 1, 2007 Report Share Posted July 1, 2007 i really don't know ,i just chkd the #1 WIRE and noticed no spark and then jumped on the computer and started searching forums.. i don't know much about coil packs. My guess is that you won't find any spark on any of the coils, and its your ignition module. A four-coil distributorless ignition with a waste spark set up provides spark to the plugs. What is an ignition module? The electronic control module for the ignition system. On vehicles with electronic ignition systems, points were replaced with an ignition control module and cam lobes were replaced with a trigger device. The trigger device, also referred to as a magnetic pick up or Hall effect sensor sends a signal to open and close the ground circuit to the ignition coil to fire the spark plugs. As it current flows thru the trigger unit, the module turns the current back on. It's an a very accurate method of controlling this procedure. Another advantage of the electronic ignition system is that it is able to produce higher voltages, up to twice the voltage than that of prior conventional ignition systems. What are the symptoms of a defective ignition module? If a module is defective, the vehicle is usually completely dead. The engine won't run because there's no trigger voltage to the ignition coil Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
txlizerd Posted July 1, 2007 Author Report Share Posted July 1, 2007 as i have just recvd the car not long ago i'm not sure where everything is ,so if you or someone don't mind I need some info on location of somethings ,what is the thing atop dist. and where is control moule inside dist? also coil? Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 1, 2007 Report Share Posted July 1, 2007 Totally disregard my post above, you have a 4.9 in your Deville. I am sorry, I missed that you have a 93.. Great Engine. Pull the distributor cap and look to see what is going on, see if you have a cracked cap or bad rotor. Your distributor has 4 twist hooks on it... Report back what you find and we can go further. Look for carbon tracks and cracks. You have no spark. There is also an ignition module and coil in there. Truthfully however I have never heard of a 4.9 coil going bad, but we must realize that they are getting older and we may begin seeing them go bad. I replaced the coil in my 91 4.9 with an Accel coil with 45,000 volts. Also, check the connector on the side of the cap, to see if it backed out and dropped off...that will kill the car like you turned off the key.... Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
txlizerd Posted July 6, 2007 Author Report Share Posted July 6, 2007 ignition module was the culprit.running great 25 mpg,alls well, THANKS TO EVERYONES INPUT!!!!!! BEST HELP PAGES EVER.... Link to comment Share on other sites More sharing options...
adallak Posted July 7, 2007 Report Share Posted July 7, 2007 ignition module was the culprit.running great 25 mpg,alls well, THANKS TO EVERYONES INPUT!!!!!! BEST HELP PAGES EVER.... BBF was actually right! The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 7, 2007 Report Share Posted July 7, 2007 ignition module was the culprit.running great 25 mpg,alls well, THANKS TO EVERYONES INPUT!!!!!! BEST HELP PAGES EVER.... Glad you got it fixed, come back when you need help, Mike Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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