Question about 1998 Toyota 4Runner
My son tightened the leaking oil filter and filled the oil back to full; Now the car turns over but won't start. Running a code checker it says something about a throttle body position sensor? This is second hand info. They un hooked and rehooked the battery but to no avail. Any ideas? Thanks Kelly
Throttle body position sensor (TPS), JUST locate the throttle body and you will see an electrical plug, RIGHT at the throttle butterfly, check if it's LOOSE or if there's anything WRONG with the WIRES, and go from there.
Normally, it will have like 4 wires, not sure about the color, but 1 is constant power, 1 is output signal, 1 is IDLE/Wide open throttle SIGNAL, and the LAST is ground.
Use a Voltmeter, hook the NEG-(black lead) to chassis or BATTERY NEGATIVE. The RED lead is probed into any wire to check for any voltage. ONLY perform this check when you have Ignition ON, means that you have power, but engine OFF. Do not take hours long you will drain the BATTERY.
Power wire will either be always 5V or 12V constant.
Ground will have ~0 Voltage.
OUTput signal wire will VARY as you work the throttle, start at 0.5 "ish" and 4.5V "ish at Wide open.
The idle switch signal should switch between maximum and minimum value as you work the throttle BACK and FORTH.
CHECK ONE AT A TIME.
IF NT working, look for a new part. IT's TOYOTA should not be EXPENSIVE.
FEEL FREE TO DESCRIBE what you find to me :).
Posted on Nov 04, 2012
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Posted on Jan 02, 2017
SOURCE: 1997 Toyota Camry code P0171
ita a little black box with 5 wires plug, between air filter and throttle, but try to reset maybe was a momentany failure,disconnect the negative battery terminal few minutes
Posted on Apr 19, 2009
Ok, there are four problem spots that i recommend inspecting the first would be the air filter.
The air filter may be clogged or dirty. this can decrease the power out put and it can also affect the idle as well. the next check point would be inspecting the spark plugs. make sue the plugs are correctly gapped and are not fouled in anyway. if they are fouled or incorrectly gapped, this will cause the symptoms you are experiencing at this time. Another check point will be the wire set(spark plug wires). make sure the wires are in good condition. remove all wires from the plugs and look inside the wire head t inspect the contacts. they should be nice and clean.if the wires are worn, replace them accordingly. the final check point will be checking the PCV valve. this valve is located Under hood, center, upper engine area, top of engine, mounted in valve cover. the testing procedure to be preformed on this specific device is stated below.
PCV VALVE TESTING PROCEDURE---
# Check the ventilation hoses and lines for leaks or clogging. Clean or replace as necessary.
# Locate the PCV valve in the cylinder head cover and remove it by pulling it upward.
# Blow into the crankcase end of the valve. There should be free passage of air through the valve.
# Blow into the intake manifold end of the valve. There should be little or no passage of air through the valve.
# If the PCV valve failed either of the preceding two checks, it will require replacement.
You will find the problem for you erratic or low idle in the areas above.
Please rate and god bless:)
Posted on Apr 27, 2009
SOURCE: Code 25 for Toyota 3.0 3VZE
code 25 air fuel ratio lean condition indicated.POSSIBLE CAUSES- AIR LEAKS IN THE INTAKE MANIFOLD -EXHAUST MANIFOLD -EXHAUST PIPES- FUEL CONTROL SENSORS IS OUT OF CALIBRATION LIKE THE-ECT IAT MAF -LOW FUEL PRESSURE LIKE- FUEL FILTER CLOGGED PRESSURE REGULATOR FAILURE- ONE OR MORE FUEL INJECTORS RESTRICTED -HO2S ELEMENT IS CONTAMINATED DETERIORATED OR HAS FAILED -VACUUM HOSE IS DISCONNECTED BROKEN LEAKING OR LOOSE.
Posted on Jul 20, 2009
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