Fresh fuel with fuel stabilizer added would be a good place to start, as much as you can get in to mix up the old. take intake hose off front of throttle body when ready to try, and spray some WD-40 inside the throttle body inlet, while holding plate open a bit. Now try to start. Don't go crazy with it, just 2 seconds or so of spray to begin with to see if it will try to start. This is all assuming you do have the engine at least cranking over.
Then it is Possible Installers Utilized Wires from Hvac system for remote start and it may be Interrupting AMPERAGE with Temp Blend doors ? if not Try a Higher rated Thermostat such as 195 degree ratting.
Drain the cooling system and disconnect the heater hoses from the heater core tubes. Plug the hoses and the heater core tubes to prevent coolant leakage.
Remove the 3 nuts located below the windshield wiper motor attaching the left end of the plenum to the dash panel. Remove the 1 nut retaining the upper left corner of the evaporator case to the dash panel.
Disconnect the vacuum supply hose(s) from the vacuum source. Push the grommet and vacuum supply hose(s) into the passenger compartment.
Remove the right and left lower instrument panel insulators.
On 1990-00 vehicles:
Remove the cross body brace and disconnect the wiring harness from the temperature blend door actuator.
Disconnect the ATC sensor tube from the evaporator case connector.
Disconnect the vacuum jumper harness at the multiple vacuum connector near the floor air distribution duct. Disconnect the white vacuum hose from the outside-recirculating door vacuum motor.
Remove the 2 hush panels.
Remove 1 plastic push fastener retaining the floor air distribution duct to the left end of the plenum. Remove the left screw and loosen the right screw on the rear face of the plenum and remove the floor air distribution duct.
Remove the 2 nuts from the 2 studs along the lower flange of the plenum.
Carefully move the plenum rearward to allow the heater core tubes and the stud at the top of the plenum to clear the holes in the dash panel. Remove the plenum from the vehicle by rotating the top of the plenum forward, down and out from under the instrument panel. Carefully pull the lower edge of the instrument panel rearward, as necessary, while rolling the plenum from behind the instrument panel.
Remove the 4 retaining screws from the heater core cover and remove the cover from the plenum assembly. Pull the heater core and seal assembly from the plenum assembly.
Carefully install the heater core and seal assembly into the plenum assembly. Visually check to ensure that the core seal is properly positioned. Position the heater core cover and install the 4 retaining screws.
Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
Position the plenum under the instrument panel with the register duct opening up and the heater core tubes down. Rotate the plenum up behind the instrument panel and position the plenum to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the evaporator case.
Install the 3 nuts on the studs along the lower flange and one on the upper flange of the plenum. Install the 3 nuts below the windshield wiper motor to attach the left end of the plenum to the dash panel and the one nut to retain the upper left corner of the evaporator case to the dash panel.
Position the floor air distribution duct on the plenum. Install the 2 screws and plastic push fastener. If removed, position the panel door vacuum motor to the mounting bracket and install the 2 attaching screws.
Connect the white vacuum hose to the outside-recirculating door vacuum motor. Connect the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the floor air distribution duct. Install the floor duct.
If equipped with manual air conditioning, connect the temperature control cable housing to the bracket on top of the plenum and connect the temperature control cable to the temperature blend door crank arm. Adjust the temperature cable.
If equipped with ATC, proceed as follows:
Connect the temperature control cable to the ATC sensor and adjust the cable. Route and connect the vacuum harness connector to the ATC sensor and connect the electrical connector to the ATC servo connector. Do not block the sensor aspirator exhaust port with the excess vacuum harness. Install the ATC sensor tube between the sensor and the evaporator connector.
Connect the ATC sensor tube to the evaporator case connector.
Install the cross body brace and connect the wiring harness to the blend door actuator.
Install the bolt to attach the lower right end of the instrument panel to the side cowl. Install the right side cowl trim panel and tighten the right door sill plate attaching screws.
Connect the vacuum supply hose(s) to the vacuum source.
Install the right and left lower instrument panel insulators and install the 2 hush panels.
Unplug the heater core tubes and the heater hoses and connect the heater hoses to the heater core tubes. Fill the cooling system.
Connect the negative battery cable and check the system for proper operation. I hope this helps. Don,t forget to rate my answer.
Remove the spark plug wires, remove the spark plugs,replace them. Do this one cylinder at a time if you never did it. On that year you may need to remove the upper intake to access the plugs on one side. In that case go to a shop. This would not be a novice job.
The starter is at the lower rear passenger side of the engine. Jack the car up and support with jack stands. bottom starter bolt is easy to get to, but other two are not. Middle and top bolts can be accessed with a very long socket extension stuck in beside the passenger side motor mount.
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as a general rule, you should replace the plug wires. but do one at a time so you dont get them mixed up. from coil to the plugs. good-day. you can go to any auto parts store to buy spark plug wires. good-day !
check your spark. If you have spark check your fuel to see if the pump is working. If there's no spark, check your distributor cap. If there's no fuel check your fuel pump relay and also the emergency cutoff switch on the drivers side in the trunk behind the carpet, make sure its pushed in.
Remove the individual coil packs located under the chrome fuel rails, just above the valve covers. Directley under the coil will be a spark plug boot, remove the boot & spark plug will be set into the hole. Will need about a 6" extention with a 5/8" spark plug socket to access.
my Haynes manual doesn't list the gap setting. but on my mark vii. i have a sticker/label under the hood that shows the belt diagram and the spark plug gap, which is .054 maybe chiltons manual might have it. or you can ask "auto zone" or where you buy the plugs.
Between the rocker cover and the fuel rail are the coils, one per cylinder hed in place by a smill 8mm bolt. Remove the coil and find the spark plug wire, the arrangement is called a coil-on-plug or COP. Spark plug is in the tube from whince the spark plug wire came. 5/8" deep socket and long extension will reach it. Another hint find some way to clean out the tube before removing the spark plug least all kinds of junk winds up in the cylinder.......SMith