No spark or fuel in a 1991 explorer
Concerning the fuel issue, i would check these components listed below for faults and possible damage as well. any damage or apparent malfunctions in these specific devices will disrupt normal fuel flow in this vehicle. The list follows.
1. Inspect the Fuel Filter-- This filter may be clogged or dirty. replace if faulty.
2. Inspect the fuel pump relay-- This relay may be faulty and not functioning at this time. it will cut of the flow of fuel if so.
3. Inspect the Fuel Injector Pressure Regulator-- This may be a problem spot as well if it becomes unstable and unable to regulate the pressure.
4. Inspect the fuel pump-- This device actually pumps the fuel needed for operation. if its not working, it will disrupt the flow of fuel to the injection system as well.
5. Another problem spot will be the Engine Control Computer-- This device is vital to proper spark and fuel operation. if its malfunctioning, it will affect spark and fuel flow. check accordingly for faults. also know as the ECM/PCM.
6. Inspect the Fuel pump strainer--- This device could be clogged or dirty as well. replace if found to be dirty or clogged.
Concerning the Spark-- This issue can encompass many problem areas in the engine compartment. One common issue with a non spark issue would be the distributor cap or ignition coil. most newer vehicles will have the coil and older models will have the distributor cap design. I would check the distributor, if installed for a cracked cap or burned components as well. if your model has a coil ignition system, i would test its operational value as well. Also, check the Wireset as well.
Check the spark plug wires for worn or damage insulation. make sure they are connected to the plugs securely and tight.
Inspect the ignition switch for broken connections. this switch, if faulty, can affect proper ignition timing and spark as well. Your vehicle has a distributorless system and i will address the proper procedure that will allow proper testing results.
The distributorless ignition system used by 1991-94 2.3L and 4.0L, and
all 1995-99 engines is referred to as the Electronic Ignition (EI)
system. It eliminates the conventional distributor by utilizing
multiple ignition coils instead. The EI system consists of the
Crankshaft Position (CKP) sensor
Ignition Control Module (ICM) (EEC-IV systems only)
The spark angle portion of the Powertrain Control Module (PCM)
I recommend testing all EI system components for faults. if there is a fault an any of the EI system devices, it will disrupt the ignition system and it will cause a non spark issue that will result in a non start.
Please rate and god bless:)
May 04, 2009 |
1991 Ford Explorer