1993 Cadillac Deville ignition

Tiny
CHISPAS
  • MEMBER
  • 1993 CADILLAC DEVILLE
Engine problem
1993 Cadillac Deville V8 Front Wheel Drive Manual 110 k miles

engine turns but wont start
it shows ECM trouble code #12, 52, 53
I installed new Ignition coil, Ignition module, rotor and cap.
The battery is fully charge.
The problem persist and it shows trouble code #12.
Any advise?
Do you
have the same problem?
Yes
No
Friday, January 18th, 2008 AT 8:56 PM

5 Replies

Tiny
BUZZSAW
  • MEMBER
Codes 52 and 53 are tps out of wack, the throttle plates need cleand and tps adjusted to.5 volts with ISC motor fully retracted

have you tried squirting carb cleaner down the throttle to see if it would start?

I think code 12 is cam reference signal, if it doesnt start with carb cleaner then replace cam sensor and pick up coil, remove the distributor to do this
Was this
answer
helpful?
Yes
No
Friday, January 18th, 2008 AT 10:50 PM
Tiny
CHISPAS
  • MEMBER
The carb cleaner worked.
I also put some quick start fluid.
Thank you.
Was this
answer
helpful?
Yes
No
Thursday, February 21st, 2008 AT 9:08 PM
Tiny
CHISPAS
  • MEMBER
I continue to have problems trying to start my caddy, I check the codes and this is what it gives me.
E: 12 - 52 - 53 - 70
EE: 12 - 70
In your previews advised you talk about "TPS ADJUSTED TO.5 VOLTS WITH ISC MOTOR FULLY RETRACTED" for 52 and 53 codes, now this code 70 where is this come from. Is this throttle related issue?
Replacement of the ISC will resolve the problem?
I appreciate any advice.
This ongoing problem has render this car useless for the last 12 months. If I take it to a shop about how much will I be throwing at it to get it fix, it's staring to be very frustrating.
Thank you.
Was this
answer
helpful?
Yes
No
Tuesday, March 25th, 2008 AT 1:18 PM
Tiny
BUZZSAW
  • MEMBER
Code 12 replace the hall effect switch it in the distributor (cam sensor) remove the distributor to do this, replace the pick up coil also

the ISC motor works off the TPS if you dont set it right it throws off the ISC motor

after the dist stuff is done, do the TPS adjment, clean the throttle plates with carb cleaner there probally black with soot, the throttle plate has to be clean, raise the idle to above 1500 rpms to disingage the ISC motor, use your finger to push it down, and then disconnect it, does the car idle normaly, if it doesnt then adjust the idle to 500 rpms. Back prob the TPS for its voltage signal its.5 volts no more no less. Shut the motor off and then reconnect the ISC motor. Let the car warm up a little, it may Idle a little high, this is normal, a Idle relearn must be preformed. Shut the car off and wait a sec and then cycle the key 3 times( on, off, on, off, on, off ) turn everything off AC and heater, and start the car, let it idle for 3 min without anything on, after 3 min turn the AC on let idle 3 min, after that drop it into gear and wait 5 min, shut the car off and then test drive it, if it still Idles high do it again
Was this
answer
helpful?
Yes
No
Wednesday, March 26th, 2008 AT 7:13 PM
Tiny
CHISPAS
  • MEMBER
Replaced fuel pump, fuel pump relay and fuel filter, car ran good for a day, then trouble start again, car runs good for awhile then gas pedal pulsates, feels like cruse control trying to take over, eventually car dies, and when trying to turn key on again gas pedal starts to pulsate, let it seat for a couple of minutes then starts like nothing happen, a little rough idle when at stop light.
Car is running but with this new problem.
This is the codes I got.
E 12 - 23 - 26 - 31 - 52 - 53 - 70 - 71 - 98.
PLEASE ANY ADVISE?
Was this
answer
helpful?
Yes
No
-1
Saturday, June 28th, 2008 AT 11:01 PM

Please login or register to post a reply.

Recommended Guides