Question about Cars & Trucks
It seems taht I have replaced all the right parts but I have no solution yet. I used a screwdiver to listen for the "click" noise while the motor is running and it works but it fails the fuel purge test and when I get on the gas hard it sputters.
I'm just trying to get as much information before I kind of give you a guess. Now you say no electrical power yet it "clicks". Have you or disconnect the connector to that injector. With the key to the on position (not running), at the red wire (using a separate ground such a the battery) are you geting full power there ? Now at the white wire on that same connector using a seperate power source; in other words on your test light clip the "aligator" part of the light to the positive battery post and the "pointy" part of the light to the connector where the white wire is. Now as you turn the engine over or even if it's runing on the other 7 injectors are you getting a pulse or flicker at a regular "rate" not once in a while ? Last at the PCM harness (I know you said you replaced but am just starting from point A to be sure) at "pin" location 101 (see picture below), from that location check the resistance at that connector (pin 101) and at the connector at the injector at the white wire. You should pretty much be zeroed out as far as continuity with an ohm meter. You can also do that test to see if you are getting the same "ground" pulse by plugging in the PCM connector and checking there (carefully) to see if you are getting the same pulse there as you are at the injector connector. It should be the same. You can check with another injector to see if it tests out different. You may have done this already but as I said am starting from square one. I don't know it all but happen to be a Ford electronics specialist. Are you getting any trouble codes ? Feel free to comment back here or you can email me directly at firstname.lastname@example.org and I will do my best to help and no there is no cost for my help. Here's the PCM connector:
Posted on Feb 18, 2012
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Posted on Jan 02, 2017
or google: 1995 mustang cobra engine wiring diagram
PLEASE RATE MY ANSWER.
Posted on Mar 07, 2009
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Feb 22, 2017 | Jeep Cars & Trucks
Inspect the powertrain control module (PCM) grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .
Search for bulletins.
Test the engine coolant temperature (ECT) sensor for being shifted in value. Connect a scan tool. Compare the engine coolant temperature against the intake air temperature (IAT) on a cold engine. The ECT and IAT sensor values should be within ?± 3?°C (5?°F) of each other. If the ECT sensor is out of range with the IAT sensor, check the resistance of the ECT sensor. Refer to Temperature Versus Resistance for resistance specifications. Replace the ECT sensor if the resistance is not within the specification. If the sensor is within the specification, repair the ECT signal circuit for high resistance.
Inspect the mass air flow (MAF) sensor installation. A MAF sensor that is incorrectly installed may cause a hard start. Important: The embossed arrows on the MAF sensor indicate the direction of the intake air flow. The arrows must point toward the engine. Install the MAF in the proper direction. Refer to Mass Airflow Sensor/Intake Air Temperature Sensor Replacement .
Inspect the camshaft position (CMP) sensor for proper mounting and/or a bad connection. A long crank time occurs if the PCM does not receive a CMP signal.
Inspect the fuel pump relay operation. The fuel pump should turn ON for 2 seconds when you turn ON the ignition. Refer to Fuel Pump Electrical Circuit Diagnosis .
A faulty in-tank fuel pump check valve allows the fuel in the lines to drain back to the tank after the engine stops. Refer to Fuel System Diagnosis .
Inspect both injector fuses for being open. An open injector fuse causes four injectors and four ignition coils not to operate. Replace the fuse. Inspect the injector circuits and the ignition coil circuits for an intermittent short to ground.
Inspect for incorrect fuel pressure. Refer to Fuel System Diagnosis .
Inspect for a restricted fuel filter. Refer to Fuel System Diagnosis .
Inspect for a contaminated fuel condition. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
Test both injector fuses for being open. An open injector fuse causes four ignition coils and four injectors not to operate. Replace the fuse. Inspect the ignition coil circuits and the injector circuits for an intermittent short to ground.
Inspect for proper ignition voltage output with J 26792 Spark Tester. Refer to Electronic Ignition (EI) System Diagnosis .
Remove the spark plugs and check for the following:
Correct heat range
Refer to Spark Plug Inspection in Engine Electrical.
Determine the cause of the fouling before replacing the spark plugs if the spark plugs are gas, coolant, or oil fouled. Refer to DTC P0172 or P0175 for diagnosis of the rich condition. Refer to Spark Plug Inspection in Engine Electrical for diagnosis of coolant or oil fouled spark plugs.
Inspect for bare or shorted ignition wires.
Inspect for loose ignition coil grounds. Refer to Electronic Ignition (EI) System Diagnosis .
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