Question about 1990 Oldsmobile Cutlass Supreme Conv

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Stalling 3000.00 in repairs still doesnt work list of repairs new fuel system-heater core radiator-ecm-plugs wires

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  • sholle51 Apr 18, 2009

    help no one can sole this problem

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Make sure the system is maintining pressure.
My problem tuned out to be,that small part that goes between the fuel pump and the fuel line inside the gas tank.

Posted on Sep 07, 2009

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How to replace heater core in 2012 dodge avenger


Lotta work - need to remove dashboard to get to heater core - and before disconnecting heater core hoses you have to remove all coolant from car by draining radiator and opening heater valve to full heat. Remove core, replace with new one and reverse other operations. Make sure to properly refill radiator so there are no air pockets that will restrict coolant flow.

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Why doesnt my heater/ac work


Is it smoke or steam? Many times it is a bad heater core, hose or other issue. If you find the coolant level in the radiator is disapering then this shows to check what I mention above. If smoke then you have to check the wires for signs of burnt and melting insulation.
It is probably a heater core or hose though. A tip... He over use tap water in your cooling system. Only use distilled water or heater cores, radiators and worse problems may occur.

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I have a 1995 Mercedes c220 air works in summer but no heat in the winter. Climate control seems to work fine. Has been reset but do not no the proper code to reprogram. Also runs fine in park and neutral...


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Nov 17, 2013 | Cars & Trucks

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My 1998 pontiac firebird service engine light came on and my OBD11 scanner produced 2 trouble codes PO125 ( insufficient coolant temperature for closed loop fuel control.the 3800V6 engine over heating and...


service the engine.. change oil ,filter plugs etc

did you clear the faults before each read
Diagnose Buick 3800 Engine
unusual code that

P0125 is the OBD-II generic code for the engine computer, or Engine Control Module (ECM), not detecting enough heat in the cooling system before the fuel management system can take control. The ECM has a predetermined value after you start your vehicle to expect a certain coolant temperature

P0125 OBD II Trouble Code Insufficient Coolant Temperature for Closed Loop...

ecm runs the engine cooling fans

3800V6 engine over heating and heater produces cold air
try these

EGR vale not working
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soft radiator hoses
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internal heating
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Apr 16, 2017 | Cars & Trucks

1 Answer

How to back flush heater core 2007 grand prix


drain coolant system locate heater cores hoses going through firewall you need to buy the radiator flush kit at any auto parts stores. remove heater cores hoses from one end or buy extra long heater hoses same size as heater core hoses in vechicle at auto parts store use the flush kit when you flush through one of the heater core hoses let the other hose drain in a drain pan when you use home garden hose use low water pressure dont use garden hose to the max or you will rupture heater core. your best bet let radiator shop flush whole coolant system. because heater cores hoses are in a tight spot.make sure engine off if you just going to flush out heater core only .after flushing heater core good time to replace heater core hoses.if job too hard or complicated let radiator shop flush out radiator the engine block and heater core because if radiator stopped up or engine block stopped up the gunk and rust will reenter plug up heater core.if you tight on money you can flush out your own radiator.drain out radiator using large drain pan. remove top radiator hose and remove bottom radiator hoses connect to water pump.use garden hose with flush kit part with water pressure not too high put garden hose to top radiator hose run water until clear water run out bottom radiator hose in drain pan,the flush out engine block remove thermostat.if you had another spare thermostat housing with RTV SILICONE SEALANT THAT HAS SET UP INSTALL THERMOSTAT HOUSING BACK TO ENGINE WITHOUT THERMOSTAT FLUSH OUT THE ENGINE BLOCK, WHEN DONE INSTALL NEW THERMOSTAT THEN INSTALL ORIGINAL THERMOSTAT HOUSING WITH NEW ORING WHICH YOU BUY AT DEALERSHIP.IF ALL SOUND COMPLICATED LET RADIATOR SHOP FLUSH OUT COOLANT SYSTEM.

Nov 27, 2012 | 2003 Pontiac Grand Prix

1 Answer

Heater doesnt work what needs to be replaced


Hello therre,
You did nto tell if there has been any chemical radiator repair added into your system or not. Have you tried to FLUSH the COOLANT System? Otherwise, is it because the fan on the heater core not operating? Or is it because the coolant is not flowing into the heater core? You may need to simply replace the ehater core (I'd grab one out of a auto wrecking/ junkyard)
please provide feedback
Best regards
Ck

Jul 17, 2012 | 1995 Toyota Corolla

2 Answers

My in heater in a 2007 grand prix doesnt work the air blows but isnt hot temperture gauge looks fine an have changed out thermostat


You have a plugged up heater core. Try pulling the heater hoses of where they go into the firewall, put a garden hose with a spray nozzle in one hose and gently flush the system out. you will need to pull both heater hoses off to do this.

Feb 11, 2011 | 2007 Pontiac Grand Prix GXP Sedan

1 Answer

Heating system just blowing out cold air. New Thermostat and plug wires have been replaced.


if the car is otherwise running well, replacing the thermostat is not going to fix a heater. the plug wires also have nothing to do with the heater. the heater is a small radiator inside a box which is inside the car, generally under the dash behind the glove box. you do not say how old your car is but if it is 9 or more you could well have a bad core, they corrode and plug up with age, either condition will stop the heater from working, but the engine will continue to run OK. there are two heater hoses under the hood coming from the engine which connect to the core at the firewall. if the engine is warm and one of those hoses is still cold then you are not getting circulation through the core and it is not going to work for you.

Jan 12, 2011 | Ford Expedition Cars & Trucks

1 Answer

No heat, and I want to replace the heating core, need directions


Heater Core REMOVAL & INSTALLATION CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old. Front 1988-91 R/V SERIES WITHOUT AIR CONDITIONING
  1. Disconnect the negative battery cable.
  2. Disconnect the heater hoses at the core tubes and drain the engine coolant. Plug the core tubes to prevent spillage.
  3. Remove the nuts from the distributor air ducts in the engine compartment.
  4. Remove the glove compartment and door.
  5. Disconnect the air-defrost and temperature door cables.
  6. Remove the floor outlet and unfasten the defroster duct-to-heater distributor screw.
  7. Remove the heater distributor-to-instrument panel screws. Pull the assembly rearward to gain access to the wiring harness and disconnect the wires attached to the unit.
  8. Remove the heater distributor from the truck.
  9. Remove the heater core retaining straps and remove the core from the truck. To install:
  10. Install the heater core. Be sure that the case-to-core and case-to-dash panel sealer is intact.
  11. Position the heater distributor. Connect the wires attached to it and then install the heater distributor-to-instrument panel screws.
  12. Install the floor outlet and tighten the defroster duct-to-heater distributor screw.
  13. Connect the air-defrost and temperature door cables.
  14. Install the glove compartment and door.
  15. Install the nuts into the distributor air ducts (in the engine compartment).
  16. Connect the heater hoses at the core tubes.
  17. Connect the negative battery cable. Fill the cooling system and check for leaks.
1988-91 R/V SERIES WITH AIR CONDITIONING
  1. Disconnect the negative battery cable.
  2. Disconnect the heater hoses at the core tubes and drain the engine coolant. Plug the core tubes to prevent spillage.
  3. Remove the glove compartment and door.
  4. Disconnect the center duct from the defroster outlet duct.
  5. Disconnect the center, lower air distributor and the center air outlet ducts.
  6. Disconnect the temperature door cable.
  7. Remove the nuts from the 3 selector duct studs that project into the engine compartment.
  8. Remove the outlet duct-to-instrument panel screws. Pull the assembly rearward to gain access to the wiring harness and disconnect the wires and vacuum tubes attached to the unit.
  9. Remove the heater distributor from the truck.
  10. Remove the heater core retaining straps and remove the core from the case. To install:
  11. Install the heater core. Be sure that the core-to-core and case-to-dash panel sealer is intact.
  12. Position the heater distributor. Connect the wires attached to it and then install the heater distributor-to-instrument panel screws.
  13. Install the floor outlet and tighten the defroster duct-to-heater distributor screw.
  14. Connect the temperature door cable.
  15. Connect the center and lower air distributors and the center air outlet ducts.
  16. Connect the center duct to the defroster outlet duct.
  17. Install the glove compartment and door.
  18. Connect the heater hoses at the core tubes.
  19. Connect the negative battery cable. Fill the cooling system and check for leaks.
1988-90 C/K SERIES
  1. Disconnect the negative battery cable.
  2. Remove the coolant overflow bottle.
  3. Drain the cooling system.
  4. Disconnect the heater hoses at the core tubes.
  5. In the engine compartment, remove the heater case-to-firewall screws.
  6. Disconnect the antenna cable at the mast.
  7. Remove the glove box.
  8. Disconnect the wiring harness at the engine's Electronic Control Module (ECM).
  9. Remove the ECM and bracket.
  10. Remove the right side kick panel.
  11. Remove the right side lower dash panel bolt and nut.
  12. Remove the heater case mounting bolts.
  13. While lifting the instrument panel slightly, remove the case assembly.
  14. Lift the core from the case. To install:
  15. Lower the core into the case.
  16. Position the case assembly against the firewall.
  17. Install the heater case mounting bolts.
  18. Install the right side lower dash panel bolt and nut.
  19. Install the right side kick panel.
  20. Install the ECM and bracket.
  21. Connect the ECM wiring harness.
  22. Install the glove box.
  23. Connect the antenna cable at the mast.
  24. Install the heater case-to-firewall screws.
  25. Connect the heater hoses at the core tubes.
  26. Fill the cooling system.
  27. Install the coolant overflow bottle.
  28. Connect the battery cable.
1991-92 R/V AND 1991-98 C/K SERIES
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the instrument panel glove compartment.
  4. Tag and unplug all electrical leads as necessary.
  5. Remove the center air distribution duct from the floor.
  6. If necessary, remove the ECM and mounting tray.
  7. Remove the hinge pillar trim panels.
  8. Remove the blower motor cover and then remove the motor.
  9. Remove the steering wheel and tilt back the instrument panel slightly.
  10. Remove the coolant overflow tank. Disengage the heater hoses at the core connections.
  11. Unfasten the attaching screws and nut and then remove the heater case.
  12. Remove the seven screws and lift off the heater case cover.
  13. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case. To install:
  14. Install the heater core in the case.
  15. Install the heater case bottom plate. Make sure there is a good seal.
  16. Install the heater case into the truck. Tighten the 4 lower screws to 17 inch lbs. (2 Nm); the upper screw to 97 inch lbs. (11 Nm); and the nuts to 25 inch lbs. (2.8 Nm).
  17. Connect the heater hoses at the core tubes.
  18. Install the coolant overflow tank.
  19. Install the instrument panel and the steering wheel.
  20. Install the blower motor and cover.
  21. Install the trim panels and if removed, the ECM. Install the air distribution duct and reconnect all electrical leads.
  22. Install the glove compartment. Fill the cooling system and connect the battery cable.
Rear 1988-91 MODELS
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Disconnect the heater hoses at the core tubes.
  4. Disconnect the blower motor wiring harness.
  5. Remove the blower motor clamp.
  6. Remove the motor attaching screws and lift out the motor.
  7. Unfasten the upper-to-lower case half screws and remove the upper case half.
  8. Remove the core seal.
  9. Lift out the core. To install:
  10. Install the heater core.
  11. Install the core seal.
  12. Install the upper case half and then tighten the upper-to-lower case half screws.
  13. Install the motor and then tighten the attaching screws.
  14. Install the blower motor clamp.
  15. Connect the blower motor wiring harness.
  16. Connect the heater hoses at the core tubes.
  17. Fill the cooling system.
  18. Connect the negative battery cable.
1992-98 MODELS
  1. Disconnect the negative battery cable and drain the engine coolant.
  2. Remove the right rear quarter panel trim and then remove the panel itself.
  3. Remove the right rear wheelhousing liner.
  4. Disconnect the heater hoses from the core.
  5. Unplug the electrical lead. Remove the drain valve.
  6. Remove the heater module.
  7. If necessary, remove the blower motor.
  8. Remove the heater case cover.
  9. Remove the heater case cover and then remove the heater core. To install:
  10. Install the heater core and then install the heater case cover.
  11. If removed, install the blower motor.
  12. Remove the heater module.
  13. Attach the electrical lead. Install the drain valve.
  14. Connect the heater hoses to the core.
  15. Install the right rear wheelhousing liner.
  16. Install the right rear quarter panel and then install the trim.
  17. Connect the negative battery cable and fill the engine with coolant.
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Dec 10, 2010 | 1995 Chevrolet Tahoe

2 Answers

No fuel to the rail. New pump,filter,control module over radiator(2).checked inertia switch. if wire to inertia switch is same color code as wire leaving ECM then no power leaves ECM when switch is...


It helps if you tell what year,model, engine you are working on. Is power at the Inertia Switch? The power comes from the FUEL PUMP RELAY, the ECM only grounds the relay to turn it on. but not knowing what you are working on, thats all the info I have .

Sep 07, 2010 | Ford Taurus Cars & Trucks

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