Have you checked if your closed loop fuel control is working properly ?  Does the oxygen sensor switch back and forth at the 1000 RPM point and at the 1500 RPM-2000 RPM point ? Is the ignition t...

A certain wire needs to be grounded. I believe there is a red wire with a brass metal washer on the end that comes from the climate control plug. If that wire is grounded then the climate control will...

I recieved your datalog. I will check it out.

I am not sure why your cranking fuel pulsewidth is only 12 msec. I think your cranking fuel pulsewidth should be over 20 msec. I agree with TurboRay, I don't think that the Barometric Absolute Pressu...

TBL002 (2E02 hex) engine acceleration based spark adder is added to either the low octane fuel table TBL013 (2D47 hex) or the premium fuel table TBL012 (2C8C hex). This occurs at both Part Throttle a...

You verified the camshaft timing, then the engine did not start. You must have changed something. You added an adjustable camshaft drive sprocket and then the engine did not start ? Your question abo...

The Engine Coolant Temperature sensor in the lower intake manifold between cylinder #1 and cylinder #2 has two pins. This is the Engine Coolant Temperature sensor that the EEC-IV module uses to determ...

I found the eecanalyzer website with the memory location definitions. I thought I would post it here if anyone else is interested. Each EEC strategy has an Excel spreadsheet that explains the differen...

Estimating your ignition timing based on the rotor position is difficult. If you have a timing light, then you should check your ignition timing while cranking. The rotor is supposed to supply spark f...

Is there somewhere that I can get the Binary Editor file that tells you where the calibratable parameters are located in the LA3 ?

1) The Keep Alive Memory voltage (pin #1) is not very important. The only thing that the LA3 KAM remembers is continuous self test codes. 2) The Low Octane Fuel switch (pin #24) changes base spark ti...

I think advancing the camshaft timing should increase the exhaust pressure at lower engine speeds and reduce the exhaust pressure at higher engine speeds. This guess, of exhaust pressure change, is ba...

You are showing the picture of a temperature sensor that is a switch. The purpose of the temperature switch is to prevent the heater fan from running before the coolant is warm. If your heater fan run...

Yes, the LA3 has a vehicle speed threshold to disable the low speed puller fan in the Turbocoupe. The vehicle speed is determined by the T5 manual transmission / A4LD automatic transmission mounted Ve...

People have made lots of power using the LA3 EEC-IV as the engine controller. You need to check your fuel pressure while driving. Does your fuel pressure stay 39 psi above the intake manifold gage pr...

The LA3 strategy is not calibrated to turn off the Low Speed Fan or the High Speed Fan based on vehicle speed. The strategy checks vehicle speed on pins 3 (VSS+) and 6 (VSS-) but the vehicle speed is ...

The fuel injectors, the ignition coil and the air bypass valve should have 12 volt power connected to them. They are all coils of wire with low electrical resistance. You should see 12 volts on both s...

If the engine runs the same when the air flow meter is plugged in and when the air flow meter not plugged in then the engine controller is probably not reading the air flow meter at all. This is a sit...

You use this engine in a Ranger in demolition derbies ? If the fuel system is running the mixture too rich or too lean then maybe the air flow measurement is messed up. You should be looking for pla...

I had some popping in the exhaust during deceleration when I had a small exhaust leak, in my exhaust manifold, on a non-turbocharged car.