Question about 1994 Toyota Pickup
Nothing yet just wondering if its the voltage regulator or alternator
Check voltage output on alternator should be around 14 - 14.5 volts running....i think the regulator is internal on alternator
Posted on Dec 09, 2014
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Posted on Jan 02, 2017
Hello! I too am PA St Insp Mechanic.
Here are some suggestions:
Note that the Fuel injection computer starts to cease to work properly at 10.5 VDC. This leads me to a voltage issue. You mentioning that the veh has bright headlamps may be consuming more power than the alt can deliver, with the heater, the lights and the other "normal" draws.
Test the alt output with a voltmeter, plus to plus, minus to minus, at the battery. You should read 14 + volts with all of the above mentioned accessories on, at idle. 11-12 volts = bad alternator, unless the belt is real slipping bad. 14.4 is the spec.
Also, the Voltage Regulator in inside the alternator.
Glad to provide assistance to you; please rate my help with a FixYa, I would be very grateful.
Posted on Jan 22, 2009
I would suspect a vacuum leak. At idle under high vacuum the air fuel mix is being leaned out until you have misfiring so bad the engine quits. The exhaust smells rich because even a lean mixture, if it doesn't light off, if full of unburned fuel. At road speeds, the vacuum is low so the engine doesn't care if there is a small leak somewhere. It is getting most of its air through the open throttle. Check all your vacuum lines but remember that even if every line is okay, it could still be leaking from an old cracked intake manifold gasket.
Posted on Jan 28, 2009
I just worked on this problem a couple of days ago. If the motor is a 3.0 liter. The idle control valve is located at the bottom of the throttlebody assembly right below the bore for the throttle butterflies..What usually causes this valve to go bad is the mechanical part of the sensor sticks as it becomes sludged or carboned up. Manufacturer claims that the valve cannot be cleaned and should only be replaced....It's a high dollar repair to replace this sensor as your engine coolant flows through this electrical valve. The valve idles the car fast when cold, as the antifreeze gets hot the valve drops the idle down.....I have successfully cleaned several of these valves and cured the dying problems...
First remove the air filter top cover and the tubes that connect to the throttlebody. In the right throttlebody you will see a port right before the butterfly. Under the throttlebody you have a black plastic sensor with a 2 wire terminal. Remove the 2 phillps screws and pull off the electrical part of the valve. you will feel a magnetic pull while removing. Remove slowly and catch the black sealing oring, and there will be a metal washer also.. The shaft that is exposed is the mechanical control of the valve. Rotate the shaft and it should feel sticky if bad..Using a throttlebody spray cleaner spray into the small square port of the right bore, rotate shaft and spray until stickfree.....Reassemble
Posted on Apr 05, 2009
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