When is an EEC IV engine running too lean?
When is an EEC IV engine running too lean?
If the output of the O2 (HEGO) sensors stay either below .33 volts or above .8 volts, then the engine is running too lean or too rich.
Where does the load come from on a Ford 302?
In the case of SD (not illustrated here), the load is based on Ford’s volumetric efficiency (VE) values for the 302, which are contained in the EEC tables. EEC Controls
How does the EEC control the spark timing?
If the SPOUT plug is not inserted, spark timing remains at base timing during engine operation. The EEC controls the spark based upon lookup tables like the air/fuel mixture. Below are figures of the A9Lspark table with conditions under which it is modified and a ‘95 spark table.
How does adaptive control work on EEC IV?
The Adaptive Control will also monitor how the engine is responding to the way you drive and make adjustments. Your ET may improve slightly after several runs as the Adaptive Strategy shifts from street driving to drag racing.
What causes a Ford EEC IV TFI to stall?
To start with, here are some links you may find helpful: TFI Stall NO Start – TFI Module Diagnosis and Sealing: This bulletin addresses loss of module ground due to salt and moisture entering a module mounting screw.
If the output of the O2 (HEGO) sensors stay either below .33 volts or above .8 volts, then the engine is running too lean or too rich.
What does push start mode on Ford EEC IV do?
The push start mode allows for increased dwell, or coil on time, when starting the engine. During this mode, the TFI determines when to turn on the ignition coil based on engine speed information. The coil is turned off, thereby firing, whenever a rising edge of a SPark OUTput (SPOUT) signal is received.
Is there Hard fault code for EEC IV?
If for example there was a loose wire to a solenoid that only lost contact while driving but was making contact while testing the system there would be NO HARD FAULT CODE. The code would show up IN MEMORY. The same would happen for a sensor that only went out of range occasionally.
