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1993 Mitsubishi Expo LRV Question: how 2 reset factory alarm on a 93 mitsubishi expo lrv? is alarm aftermarket?

 

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rscot73, San Leandro, CA, March 16, 2012, 17:44
 Rookie

i ran out of gas and then the battery ran down while trying to start it. now it spins but no combustion at all. what can i do? checked the fuel pump and filter but they were fxning. tested plug, no spark at all, i think antitheft my have crippled my car. never used an alarm and had it running perfectly for over a year w no problems starting. i also want to find diagnostic codes but i'm afraid to do anything till it's started

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  • Answer #1

    Hal... (see my shops), March 16, 2012, 17:59
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     Master

    You should be able to arm and then disarm it. You need to recharge the battery or replace it. Check your fuel pressure to make should the fuel pump is working.

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    rscot73, March 16, 2012, 18:05
     Rookie

    i don't have a remote, owned the car for 1.5 years without problem

    fuel pressure is good

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    PARTS GUY, March 16, 2012, 19:28
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    What is the fuel pressure reading?

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  • Answer #2

    patrick mannion from Greg Solow's Engine Room, March 16, 2012, 23:49
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    Fuel pressure should be 50 psi un regulated, 38 regulated. Check the basics check for spark and fuel/ fuel injection triggering.Remove the fuel hose that goes to the fuel rail and get a friend to crank over the engine to see you have adequate fuel volume (you should have approximately 1 pint of gasoline in ten seconds of cranking). Off course take proper precautions as gasoline is highly flamable. Next "listen" to the fuel injector. Using a mechanic's stethoscope (or use a long screw driver placing the handle end up to your ear place the metal tip end of the screwdriver against the body of the fuel injector), get a friend to crank over the engine while you "listen" to the fuel injector listen to each injector at the same point of the injector body. You should hear "click, click, click" as the injector is electrically opened and closed by the computer. If the injector is not being triggered you will not have fuel getting into the engine's cylinders. Disconnect the electrical connector at the fuel injector with the ignition key in the "on" position, (next position after the accessory position) you should have 12 volts at one of the two wires at the injector. This true for most vehicles but you need to consult a workshop manual for your vehicle to see that this is true for your vehicle. When the engine is running the second wire at the injector gets (triggered) grounded by the computer in your vehicle many times a second controlling exactly when and how much fuel gets injected into the engine.
    Check for ignition spark. Use caution when checking ignition spark firstly it provides very high voltage (about 15,000 to 40,000 volts) but it is low amperage, it can give an unexpected shock but is unlikely to kill anyone, secondly the spark produced can ignite any flammable gas or liquid (for example gasoline or the gaseous vapors of a lead acid battery). Remove the spark plug wire (or ignition coil if the ignition system on your car is coil over plug type), place an old spark plug with the gap between the electrode and shell of the spark plug "widened" to about .060" or .070" of an inch. Firmly ground the spark plug shell to a good engine ground. Hold the spark plug wire or coil with an insulated pliers and get a friend to crank over the engine while you watch for a pulsing bright spark jumping across the spark plug gap. Look on Youtube for a video on "Check for spark" or Check for ignition spark" I am sure someone has posted a good video clip.
    There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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