My 87 ford ranger 2WD failed IM because my check engine light will not come on. I took the cluster off and there isnt even a hole where the bulb for the check engine light is suppose to go. Does anybody have a clue whats wrong with this?
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Re: failed smog cause check engine light
I can tell you for sure that all US models of the Ford Ranger came with a emission system that incorporated a MIL or check eng light, go to the dealer and have them run your VIN on the Ford on line information service, that will give you the engine Calibration of the emission system, you can then find out what emission system was used, export or US.
I can tell you from experience... I have taken the dash apart, a long tedious process.... checked the bulbs only to realize that the check engine light was never wired... there is a hole for the bulb, but no circuit on the circuit board... I have since talked to a mechanic who told me that the 87 has no check engine light. ford never wired em in. the emmissions light and parking brake light are the only lights working in my 87 ranger, besides the backlight and blinkers. hope this helps
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Since you have an '87, you most likely don't have one if you have never seen it on. Pull the instrument cover panel, then the three hex screws that hold the idiot light panel on the instrument cluster. The 1987 had a check engine graphics gel, but the instrument cluster did not have the check engine function on the printed circuit board. There is no such light included on that year model, I am not sure what month between the 1987 and 1988 model years introduced it.
No any codes will let you fail..Rangers are bad about the valve sticking..But first look on th driverside very back on the intake..Youll see a valve with two vacuum lines The one that goes on the bottom of the valve makes a 90 bend and is bad about breaking..If the lines are good then work the valve by hand and see if it will move
Before the emission test make sure your air filter is clean, change the oil, and make sure your engine is in tune. Worn spark plugs are the #1 emission item that will usually fail the car. Make sure the check engine light works properly. To check the light, turn on the ignition, the light should come on for a second or two and then go off. After the engine has started the light should remain off. If your light is on they will fail the car.
What engine? It won't cause any running problem but gas milage will be effected just because the light is on. Ford computers change parameters when the light is on and mileage will drop 1-2 miles per gallon.
You should check the make sure the thermostat operates normally and
that the fuel octane is 87 or higher (usually the lowest grade
available at the station, so I doubt this is the issue). If your
engine temperature isn't too high and the fuel is 87 octane or more,
I'd expect you probably have a catalytic converter issue