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when ignition is on it should be battery volts,when cranking in should pulse..(test with a led test light or osilliscope
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∙ 15y ago
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How far should the voltage on a car battery drop when cranking the car?
when cranking the engine the battery voltage should not fall below 9.6volts if so replace battery
What is code P0200?
P0200 Injector Circuit Malfunction Check the connections to each injector first. Then check voltage to each injector.
Can a voltmeter be used to measure voltage in and out of a starter motor?
Voltage flow into a starter motor, never out of it. Use the voltmeter to measure the voltage at the starter motor before starting to crank and then whilst it is cranking. (Before cranking, the voltage appears across the starter motor relay only.)
What is a saturated fuel injector?
A saturated fuel injector is also known as a High Impedance (or High z) fuel injector. The high z injector has a larger ohm draw through the coil (12v-15v) vs. a peak-hold (Low Impedance, Low z) injector, which is 2v-4v. Another difference is the how the injector uses the voltage to open the injector. A high z injector uses the full voltage to open and hold open the injector, therefore it voltage saturated. A low z injector (peak-hold) has a peak of high voltage to open then injector then uses a lower voltage to keep the injector open for the remainder of it's cycle. What this means to you, the low z injectors typically needs a resistor in line to add the necessary resistance to properly drive the system, otherwise the injectors could overheat to fatigue. A high z injector does not need a resistor.
What causes Fuel injector failure 2001 grand am?
voltage spike, bad computer, dirt/grit in fuel line plugging injector,
What is the fuel injector solenoid energized by?
Fuel injector is energize by signal composed of pulsed voltage frequency increases as with rpm set by pcm
When you turn on the key the number two injector dumps fuel in without cranking and stays on until the fuel pump cuts off ive changed the ecu and harness i think it is an ground problem?
Possible failed injector.
What causes code 26 in the ecm on a 89 lebaron 2.5 turbo need help badly i am stranded?
Info can be found here http://www.allpar.com/fix/80s-codes.html26 Peak injector circuit voltage has not been reached (need to check computer signals, voltage reg, injectors) (SEE NOTE #4 BELOW)NOTE #4.During cranking, the computer will test the current through the injector to see whether there's too much resistance in the injector's path. If there is, code 26 is set.The problem may be cured with tuner cleaner on the connectors.For TBI engines, the injector's cold resistance should be between 0.9 and 1.2 ohms (specs vary with year). This is a peak-and-hold injector. With the engine idling the peak period should be about 1.2 milliseconds whereas the hold period will vary. If it's lower than this at idle, then the injector's shorted or there's a defect in the injector driver circuit. (Bohdan Bodnar)
Why would a 1988 Chevy silverado die on road replaced fuel pump and still no start but it runs with starting fluid thens dies with out the starting fluid?
Check fuel injectors at the harness plug at the injector, with key ON, engine off. There will be 2 wires at the injector plug, 1 while using a ohm and volt meter, and 1 wire should have battery voltage with key on at all times, the other wire use a test light and back probe while someone else is cranking the motor the test light should blink on and off, while cranking. If the test light in not blinking during the cranking you most likely need an ECM Module. Your fuel injectors gets there ground pulse from the ECM so if you have fuel pressure, ignition, and spark and 12 volts at the injector but no ground replace the ECM. Hope this helps!!
Why does Ford Expedition start slow?
Presumably you mean slow cranking. Check for weak battery or bad starter. If not slow cranking so much as long cranking time check for loss of fuel pressure overnight using fuel pressure gauge. If so, suspect leaking injector or possibly leaking regulator.
How do you bleed a ford transit t260?
I undo the diesel filter and fill with diesel to the top, and refit, Then slacken off the fuel injector supply pipes on the injector end, Crank over engine until fuel appears to leak down injector connection, tighten injector fuel connections and then continue to crank over engine. Should then start to fire up. Keep cranking till engine running on its own.
How much Amps is required for fuel injector?
A fuel injector's current draw, measured in amps, is a function of the fuel injector's actual impedance. Your answer is then necessarily dependent upon the impedance of your injectors. To determine your injector's draw, simply divide voltage by ohms. That is, given a 12v circuit and an injector with 12 ohms resistance, the draw is 1 amp (12 divided by 1).
