P1260 yet car still starts?

[99sho-time]

Hey all from time to time and i'm not sure why but I'll get a P1260. the thing I don't get is the car still starts with this code. I was under the impression that the fuel wouldn't be delivered in this event. Ive personally never touched the pats system but I wonder was this something my previous owner would of fooled with?
always been curious about this.

 

[gamefanatic]

Interestingly enough, AllData doesn't identify the P1206 which is (Cylinder No.6) Injector Circuit Open / Shorted.
Depending on rather this is a constant or not, the best you might get is a misfire issue. The car should still run, and may even be unnoticeable.
You need to back probe the injector and measure resistance, it should measure at least 5 ohms. If less / open loop, then check the cables / replace the injector. Also check between the PIN's on the injector, measuring more than 10K ohms replace the injector.

If you suspect a Fuel Pump issue, best to check your fuel pressure at the rail. If your are measuring 45psi at idle then you should be good, but you need to check by whipping the throttle to see how the fuel pressure responds. It shouldn't drop much, 1 - 3 psi is acceptable, but should increase.

There shouldn't be any issues with the PATs in this case, but if you suspect something there you should see an appropriate code if your reader can support those.

Let us know when you figure out.

 

[99sho-time]

So in other words a problem with the #6 fuel injector causes a p1260? I am getting bad gas mileage. I'm sort of confused by you meant by your first line.

 

[99sho-time]

interestingly enough the #6 injector is reading anywhere from 14 ohms to 16 ohms not quite sure why its fluctuating on the meter

 

[gamefanatic]

Sorry. Yes, that code just means the Injector #6 is reading bad. Depending on the meter fluctuations may be normal as your meter may be the cause. So long as it's within range, and you can test other injectors to see if they are close.

Based on your testing results it sounds like your's is probably okay, but there may still be a wiring problem. I was able to export some of the pin point tests to possibly help...

 

[99sho-time]

Hey thanks for your response. So I test a few other injectors and all of them actually read 14.5'ish ohms i put new battery in my meter.
Being i don't have all the test equipment im gonna use a basic multimeter.

So when I back probe the injector wiring would you mind walking me through that?

so far what i do know is the #6 injector has good ohm reading and has power going to it.

 

[gamefanatic]

Sorry I gave you the same page twice. I have provided the earlier steps H47-48 which tells you which PIN's on the wiring harness at the computer you need to probe.
You won't have access to a break-out harness so a way to work around that, I usually strip some CAT-5 or CAT-6 wire or anything less than 18 gauge. Then I take the bare wire and wrap it around the PIN's on the fuel injector, then put the connector back on. Be sure to make the wires long enough that you can get to them after you have the connector on. Also make sure they do not touch each other and short themselves out. Now you can run through the tests as noted in the diagrams. Testing for voltage and resistance between the ECU and the Fuel Injector. #6 will be PIN 99 on the ECU.

Here is the ECU Connector information for your reference.

 

[99sho-time]

Pardon me for being curious and I do appreciate your time. How do you know a p1260 means that injector 6 is bad? Because ive looked everywhere and asked around.

Update. I bought a noid light and fired the engine stepped on the gas and the light pulses normally.

 

[gamefanatic]

Wow.. Sorry about that. I must have typo'd it several times (phone and computer), apparently I searched for P0260.

You are correct that a P1260 is AntiTheft module has been triggered. It is possible this is a historical value that has not been cleared, even if the problem has been resolved. I believe the error to be generic, thus there could be an ongoing problem such as a door lock failing, improper key used, etc. You will need to access the PATS to determine what code it's reporting to the ECU. You might be able to do this with a code reader, or the Ford Module in the Palmer Performance ScanXL windows product suite.

I am not sure yet if there is a manual way to check the PATS like there is with the A/C Module...

 

[99sho-time]

haha no problemo I was so confused. haha