Tip & How-To about 1999 Ford Escort

Engines with Starting Problems

All engine regardless of manufacturer need three things to start and run. Air, Fuel and Spark, lets look at each one.

Air- this refers to air intake on four stroke engines this intake is created by the piston pulling in air with the intake valve open. You must have a combustion chamber that is sealed, meaning that there are no compression leaks from the head gasket, or from the valves. The valve timing must also be correct, meaning that the intake valve is open while the piston is going down on the intake stroke. Associated parts include the air filter, air intake manifold, intake valves, pistons and intake hoses.

Fuel- this refers to fuel supply, with out fuel an engine can not run, the fuel supply has to be correct for start and run conditions. Associated parts for fuel are fuel pumps, fuel pump relays, fuel pump fuses, fuel lines, fuel injectors, fuel hoses and carburetors.

Spark- this refers to the ignition source provided to ignite the fuel mixture. Spark is generated from an ignition coil and released in several ways. Associated parts to ignition are the ignition switch, coil, ignition module, crankshaft position sensors, camshaft position sensors, spark plug wires, spark plugs, distributors, and ignition points.

If you have a vehicle in which the engine does not run one of these three things are missing, otherwise it would work, so remember to always check the basics first it will lead you to your problem faster and cheaper.

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1 Answer

Starts up for 10 seconds or so before switching off


Theres only three basic things that make an engine run.... spark, air and fuel
It starts, therefore you have spark
It runs briefly, you may not have enough air, check your air filter/intake
It then dies, you may have a fuel restriction or are losing your fuel prime, a leak or a bad seal and its sucking air into the fuel system

Feb 22, 2017 | Cars & Trucks

1 Answer

hard starting


This problem can be hard to track down , it could be caused by several thing's ! A bad check valve in the fuel pump letting fuel drain back into the tank , not keeping fuel line pressure up , a crankshaft position sensor can also cause this as well as an ignition control module !
Checks
Action
DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.
Preliminary
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Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .


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Inspect the powertrain control module (PCM) grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .


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Search for bulletins.

Sensor/System
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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 .


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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.

Fuel System
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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 .


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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 .


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Inspect for a restricted fuel filter. Refer to Fuel System Diagnosis .


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Inspect for a contaminated fuel condition. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .


Ignition System
?€¢
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.


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Inspect for proper ignition voltage output with J 26792 Spark Tester. Refer to Electronic Ignition (EI) System Diagnosis .


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Remove the spark plugs and check for the following:


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Correct heat range


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Wet plugs


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Cracks


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Wear


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Improper gap


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Burned electrodes


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Heavy deposits

Refer to Spark Plug Inspection in Engine Electrical.
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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.


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Inspect for loose ignition coil grounds. Refer to Electronic Ignition (EI) System Diagnosis .

Jul 14, 2015 | 2002 GMC Sierra 1500

1 Answer

intake manifold leak fixed


An engine needs three things to run air, fuel, spark. So check to make sure air supply is adequate. Check fuel supply. Check to see that all air has been bled from the injector rails. Check wiring again . Make sure ground strap is reattached from firewall to engine. Pull off a plug wire and check for spark. If distributor was removed make sure it was reinstalled correctly and it is not 180 degrees off. Recheck all plug together connectors. Hope this helps.

Jan 01, 2014 | 2000 Ford Expedition

2 Answers

toyota ceilca 2000 gts will not start


try reseting the alarm,maybe all thats needed.....

May 01, 2010 | 2000 Toyota Celica

1 Answer

engin crank but want start


For a engine to start it needs three things all at the same time air,spark,fuel get some starter fluid take your air filter off and spray some in the intake if it acts like it wants to run then your car is not geting fuel

Apr 26, 2010 | 2001 Chevrolet Malibu

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