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1992 Cadillac seville problem
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Guest
Anonymous Poster
May 8, 2009, 5:08 PM
Post #1 of 13
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1992 Cadillac seville problem
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i have a 1992 cadillac seville with 4.9 and its running very rich and i smell fumes. it is jerking throughout driving range. after i run the car for about 15 min. it runs better. i checked my OBD and it pops a code that says ECM? does this mean that the ecm is not communicating with the OBD? i tried putting it on a dyno and have no responce there either. Please help
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Loren Champlain Sr
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/ Moderator
May 8, 2009, 5:11 PM
Post #2 of 13
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Re: 1992 Cadillac seville problem
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Post the code(s) you retrieved.
Loren
SW Washington
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Guest
Anonymous Poster
May 8, 2009, 5:14 PM
Post #3 of 13
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Re: 1992 Cadillac seville problem
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the only real code it could be is the ECM? it wont comunicate with the dyno either
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Loren Champlain Sr
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May 8, 2009, 5:17 PM
Post #4 of 13
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Re: 1992 Cadillac seville problem
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Again, what code did you get?
Loren
SW Washington
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Guest
Anonymous Poster
May 8, 2009, 5:19 PM
Post #5 of 13
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Re: 1992 Cadillac seville problem
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the only other code it is throwing is the absolute manifold pressure. and it is saying (ECM?) The OBD is unable to pull any codes for the ECM. why is this?
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Guest
Anonymous Poster
May 8, 2009, 5:23 PM
Post #6 of 13
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Re: 1992 Cadillac seville problem
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Will the car even run if the Ecm is not working? i took it to the shop and the mechanic coulnt tell me anything cause it would respond to the dyno. hw said i need a new ECM and a new mem-cal. could that be?
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Hammer Time
Ultimate Carjunky
/ Moderator
May 8, 2009, 5:33 PM
Post #7 of 13
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Re: 1992 Cadillac seville problem
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All stored trouble codes are numbered. We need the specific numbers.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Guest
Anonymous Poster
May 8, 2009, 5:42 PM
Post #8 of 13
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Re: 1992 Cadillac seville problem
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The OBD will not tell me any trouble codes for the ECM. it wont even tell the dyno anything. Will the car even run if the ECM was bad?
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Hammer Time
Ultimate Carjunky
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May 8, 2009, 5:53 PM
Post #9 of 13
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Re: 1992 Cadillac seville problem
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Forget the dyno. That's useless.
E12 No Distributor Reference Signal
E13 Open Oxygen Sensor Circuit
E14 Shorted Coolant Sensor
E15 Open Coolant Sensor
E16 Generator Voltage Out of Range
E19 Shorted Fuel Pump Circuit
E20 Open Fuel Pump Circuit
E21 Shorted Throttle Position Sensor
E22 Open Throttle Position Sensor
E23 EST Signal Problem
E24 Speed Sensor Circuit Problem
E26 Shorted Throttle Switch Circuit
E27 Open Throttle Switch Signal
E30 ISC RPM Out Of Range
E31 Shorted MAP Sensor Signal
E32 Open MAP Sensor Signal
E34 MAP Sensor Signal Out Of Range
E37 Shorted MAT Sensor Signal
E38 Open MAT Sensor Signal
E39 VCC Engagement Problem
E40 Power Steering Pressure Switch Signal
E44 Oxygen Sensor Signal Lean
E45 Oxygen Sensor Signal Rich
E47 BCM to PCM/ECM Data Problem
E48 EGR System Problem
E52 PCM/ECM Memory Reset
E53 Distributor Signal Interrupt
E55 Closed Throttle Angle Out of Range
E58 Pass Key Control Problem
E60 Cruise - Not In Drive
E61 Cruise - Vent Solenoid Problem
E62 Cruise - Vacuum Solenoid Problem
E63 Cruise - Set Speed vs Vehicle Speed
E64 Cruise - Acceleration Too High
E65 Cruise - Servo Position Signal Problem
E66 Cruise - Engine RPM Too High
E67 Cruise - Switch Shorted
E68 Cruise - Command Problem
E70 Intermittent TPS
E71 Intermittent MAP
E73 Intermittent Coolant Sensor
E74 Intermittent MAT Sensor Signal
E75 Intermittent VSS Signal
E80 Fuel System Rich
E85 Throttle Body Service Required
E90 Cruise - VCC Brake Switch Signal Problem
E91 Cruise - PRNDL Switch Problem
E92 Heated Windshield Request Problem
E96 Torque Converter Overstress
E97 P/N To D/R Engagement Problem
E98 P/N To D/R ISC Engaged Problem
E99 Cruise - Servo Apply Problem
To extract a trouble from the computer for diagnostic purposes, the Assembly Line Communication Link (ALDL) connector is used.
Ground terminals A and B with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A 12 consists of one flash, a short pause, then two flashes in rapid succession.
After 12 is displayed, any stored trouble s will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All s are displayed 3 times each then a 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.
ALDL Connector (Located Underdash)
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on May 8, 2009, 5:56 PM)
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flgmtech1
User
May 9, 2009, 7:33 AM
Post #10 of 13
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Re: 1992 Cadillac seville problem
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I may be wrong, but what I am reading, is the Guest posting this question is using the off and warmer button on his A/C to bring up his OBD once it cycles through if no problems were found it starts with ECM? this means do9 you wish to neter the ECM parameters, for CODES, INPUTS, OUTPUTS, etc,, or if not you move on to BCM? RFA? HVAC? SIR? etc... he is not listing a code becuase it is not listing one, and, the ECM is communicating but it is waiting for commanded input.
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Hammer Time
Ultimate Carjunky
/ Moderator
May 9, 2009, 7:36 AM
Post #11 of 13
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Re: 1992 Cadillac seville problem
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That's possible. That's why I gave him the aldl method. The check engine light is coming on, there should be something there.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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flgmtech1
User
May 9, 2009, 7:38 AM
Post #12 of 13
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Re: 1992 Cadillac seville problem
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unless it is going by so quickly or a button is being pressed that is taking him past the DTC
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Loren Champlain Sr
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May 9, 2009, 3:30 PM
Post #13 of 13
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Re: 1992 Cadillac seville problem
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Probably jumping ahead of ourselves here, but a MAP sensor can cause overfueling. Check the vacuum signal to the sensor. The MAP sensor looks at manifold vacuum. When you accelerate, the manifold vacuum drops, the MAP sees this and adds fuel thinking you are under load. If you have a vacuum leak or poor engine management, it will cause a loss of vacuum, causing the MAP to add fuel. The GM MAP sensors do go bad, but need more diagnostics prior to replacing it.
Loren
SW Washington
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