yesterday I started to drive my Mustang, the engine was running and
acting normal. Then it was just like I turned off the key. It will
crank over, it just doesnt start. I can hear the fuel pump start up
when I turn on the key. I pushed in the valve on the fuel rail. I get a
small amount of fuel dribble out. Then turn key back on I hear the pump
turn on then press the valve in again and get another small amount of
fuel. So I assume I'm getting fuel ok. Next, i attached my timing light
(has a clip that goes around spark plug wire) and turned over the
engine, no light, looks like I'm not getting spark. Also, when I turn
on the Key the Check Engine light stays lit, is it supposed to do
that? i dont remember if it stays on until the engine is started. Could
someone tell me how do I test the ECU? thanks for replys.
If you have a TFI ignition module mounted to the distributor test that
component and post your results. They have a history of failure on
older/high mileage vehicles and there was even a recall/class action
suit close to that vintage, but I don't know if your vehicle has one.
My 1990 Escort GT would have qualified for a new TFI under the suite
but I missed the boat.
I am sure you will soon have better answers with more detail but - that car
uses EEC-IV controls if I remember right. Does your engine have a
distributor? Reading codes isn't hard, do a google for EEC-IV testing or
codes or something like that. Most manuals have the how-to as well.
Shooting from the hip, with no spark, I would first check the TFI module.
It controls spark and sudden failure can happen. You will likely need a
manual to find it but it's mounted somewhere near the front of the engine
compartment. If you find it, carefully remove it and take it to AutoZone or
similar. They can test it for free.
I hope this helps - there are a lot of friendly and car-smart folks on here.
There are two parts, a hall-effect unit inside the lower part of the
distributor and also the TFI module. The TFI module used to be attached to
the outside of the distributor but Ford decided it got too hot there. On my
'93 Cougar, the TFI is on a large heat sink on the passenger side fender
near the front. There is a electrical connection from the distributor to
the TFI module. The module is flat, about 1 1/2" X 4". It has multiple
Both parts can fail, the TFI module is more likely.
I hope this helps.
I had one of those fail once, too. It was on a car with the TFI attached to
the distributor. The plastic of the Hall-effect piece crumbled. It was a
real pain to replace. It required complete disassembly of the distributor.
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