My 99 F-250 is just dying sometimes. It has 280,000 mies on it . It does have a chip in it. I have replaced the camshaft postioning sensor. Any help with this problem would be great

just shutting off while driving ?

I have a 99 F-250 with 280,000 miles on it. The cps has been replaced and it is still shutting off sometimes. The truck has a chip in it and has never given me any problems any help would be great.

Welcome to FTF!

Probably help to know what engine/transmission combination the truck has, and we should probably get this into the tech help section.

I merged the threads and posts into one here in the 7.3 section. This seems to be where it needs to be. Hopefully we can get you some answers.

welcome aboard.

thanks

new to site don't really know how it works. Help with site and truck would be nice

Welcome to the site. man........get some pics up of the truck regardless of the state...also, any other symptoms? Can you start it back up after it shuts off or what? There's a few Ford techs on here and they'll be in shortly.

Remove your chip and see if it still does it.

Have u changed your Cam Positioning Sensor (CPS)

95bronk said:

Have u changed your Cam Positioning Sensor (CPS)

Click to expand...

Ah, did you read his first post???

95bronk said:

Have u changed your Cam Positioning Sensor (CPS)

Click to expand...

Read post one Mike......

flareside_thunder said:

Read post one Mike......

Click to expand...

Beat you! Nee ner neee ner neeeeeee ner.

Yes it starts right back up. Also sometimes it will shut off while driving sometimes while at an idle.

x2....try unplugging the chip and see if that changes it's attitude.

Its A superchip so just put it back to stock? The same chip has been in the truck for 5 years at the same setting. the code that it is spitting back at me is P1670

tennf-250 said:

Its A superchip so just put it back to stock? The same chip has been in the truck for 5 years at the same setting. the code that it is spitting back at me is P1670

Click to expand...

P1670 = IDM Electronic Feedback Signal not Detected

Could be bad injectors, injector wiring or IDM

Still, unplug the chip first and see if that changes anything.

flareside_thunder said:

Still, unplug the chip first and see if that changes anything.

Click to expand...

Just to clear up the confusion, it is a Superchips "Flash tuner" not a plug in chip. I also highly doubt the performance tune is the problem. It is fairly common for the IDM to corroded internally, the wires to burn or the injectors to short out. Best bet is to pull the covers and check all the wiring and connectors at the injectors for burning/melting or broken/shorted.

FJ1 DIAGNOSTIC TROUBLE CODE (DTC) P1670 and P1668

DTC P1668 and P1670 indicates that a communication error has occurred between the PCM and the IDM.

Possible causes:
Open fuse
IDM relay
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM powering circuits
PCM

Check for other codes.
Key on, engine off.
Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.

Was DTC P1668 present?

Yes- If DTC P1668 is present, GO to FJ2 . No- If DTCs P1667 and P1663 are set together with or without DTC P1668, GO to FJ6 .

If DTC P1298 is also present, REPLACE the IDM.

If DTC P1667 is also present, GO to KA1 .

If DTC P1663 is also present, GO to KF1 .

If DTC P1662 is also present, GO to NC1 .

If P1670 was set without any other DTC, GO to FJ10 .


FJ2 CHECK CIRCUIT 818 (GY/W) FOR OPEN

Install breakout box; leave PCM disconnected.
Disconnect the IDM harness connector.
Measure resistance on Circuit 818 (GY/W) between PCM Test Pin 48 and IDM harness connector Pin 4.
Is resistance less than 5 ohms?

Yes-GO to FJ3 . No- REPAIR open in Circuit 818 (GY/W). RESTORE system. CLEAR DTCs and RETEST.

FJ3 CHECK CIRCUIT 818 (GY/W) FOR SHORT TO GROUND
Measure resistance between IDM relay Circuit 818 (GY/W) and battery ground.
Is resistance greater than 10,000 ohms?

Yes-GO to FJ4 . No- REPAIR ground short in Circuit 818 (GY/W). RESTORE system. CLEAR DTCs and RETEST.

FJ4 CHECK CIRCUIT 818 (GY/W) FOR SHORT TO POWER
Key on, engine off.
Measure for voltage on Circuit 818 (GY/W) between PCM Test Pin 48 and battery ground.
Is voltage present?

Yes-REPAIR short to power on Circuit 818 (GY/W). RESTORE system. CLEAR DTCs and RETEST. No- GO to FJ5 .

FJ5 CHECK SIGNAL RETURN CIRCUIT 359 (GY/R)
Measure resistance on Circuit 359 (GY/R) between PCM Test Pin 91 and IDM connector Pin 2.
Is resistance less than 5 ohms?

Yes-GO to FJ6 . No- REPAIR open in signal return Circuit 359 (GY/R). RESTORE system. CLEAR DTCs and RETEST.

FJ6 CHECK IDM POWER
PCM connected, IDM disconnected.
Key on, engine off.
Measure voltage between IDM connector Pin 14 and battery ground.
Is B+ present?

Yes-GO to FJ7 . No- GO to NC6 .

FJ7 CHECK IDM GROUND
Key off.
Measure resistance between IDM connector Pin 26 and battery ground.
Is resistance less than 5 ohms?

Yes-GO to FJ8 . No- REPAIR open in IDM ground Circuit 574 (BK/PK). RESTORE system. CLEAR DTCs and RETEST.

FJ8 MEASURE FREQUENCY ON THE EF LINE
Connect PCM to breakout box.
IDM connected to harness.
Set up scan tool as follows:
Connect scan tool to the DLC
Connect test probe between scan tool common and breakout box Pin 77 (ground).
Connect second test probe between scan tool signal and breakout box Pin 48 (EF line).
Select VEHICLE and ENGINE
Select DIGITAL MEASUREMENT SYSTEM
Change level to 4 VOLT DC
Press the link button to choose a PID
Select PID/DATA MONITOR
Select RPM PID
Press START
Key on, engine running.
Measure frequency at 3 different RPMs.

RPM Frequency (Hz)
1000 66
2000 133
3000 200


For each rpm value, does the corresponding frequency match closely to the table?

Yes-REPLACE PCM. RESTORE system. CLEAR DTCs and RETEST. No- REPLACE IDM. RESTORE system. CLEAR DTCs and RETEST.

FJ9 DIAGNOSTIC TROUBLE CODE (DTC) P1316 INDICATES THAT CODES ARE STORED IN THE IDM
Possible causes:
Injector(s) or circuit(s)
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM relay
IDM powering circuits
IDM
PCM

Check for other codes.
Key on, engine off.
Perform KOEO On-Demand Self Test.
Are IDM or any other codes stored?

Yes-GO to the appropriate pinpoint test. No- GO to FJ10 .

FJ10 DTC P1316 OR P1670, CHECK FOR AN INTERMITTENT OPEN CIRCUIT
Key off.
Install breakout box, leave PCM disconnected.
Disconnect IDM.
Check for intermittent open in the following circuits:
Measure resistance on (FDCS) Circuit 821 (BR/O) between IDM connector Pin 17 and PCM Test Pin 95.
Measure resistance on (EF) Circuit 818 (GY/W) between IDM connector Pin 4 and PCM Test Pin 48.
Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Do all readings remain below 5 ohms throughout procedure?

Yes-GO to FJ11 . No- REPAIR open in the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST.

FJ11 CHECK FOR AN INTERMITTENT SHORT TO GROUND
Check for intermittent short to ground on the following circuits:
Measure resistance on (FDCS) Circuit 821 (BR/O) between battery ground and PCM Test Pin 95.
Measure resistance on (EF) Circuit 818 (GY/W) between battery ground and PCM Test Pin 48.
Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Do all readings remain above 10,000 ohms throughout procedure?

Yes-GO to FJ12 . No- REPAIR short to ground on the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST.

FJ12 CHECK FOR AN INTERMITTENT SHORT TO POWER
Key on, engine off.
Check for intermittent short to power on the following circuits:
measure voltage on (FDCS) Circuit 821 (BR/O) between battery ground and PCM Test Pin 95.
measure voltage on (EF) Circuit 818 (GY/W) between battery ground and PCM Test Pin 48.
Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Did voltage ever appear on any circuit throughout procedure?

Yes-REPAIR short to ground on the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST. No-GO to FJ13 .

FJ13 VERIFY DTC P1316 AND/OR P1670
Restore vehicle.
Clear DTCs.
Cycle key off, than start engine.
Road test vehicle.
Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
Was DTC P1316 and/or P1670 set in Continuous without any codes in KOEO On-Demand?

Yes-GO to FJ14 . No- REPAIR KOEO On-Demand DTCs. RESTORE vehicle. CLEAR DTCs and RETEST.

FJ14 ATTEMPT TO GENERATE IDM DTCS
Key off.
Disconnect one valve cover connector.
Start engine to generate IDM codes.
Perform KOEO Injector Electrical Self Test and KOEO On-Demand Self Test.
Are IDM codes retrieved?

Yes-REPLACE PCM, RESTORE vehicle. CLEAR DTCs and RETEST. No- REPLACE IDM. RESTORE vehicle. CLEAR DTCs and RETEST.

Wow, thanks everyone for the info. I will start the diagnosis and get back to you all

Hi to all new to this site to i have a 1995 F-250 with a 7.3 power stroke in it. it has a brand new turbo with 7k on it with a new exost and a new transmision ever since i had this truck i have been puting money into it but i love it its my baby, but any ways it was just kinda sputering and then it would turn back on and then sometimes it would die but now today i lost power and then it died and now i can not get it to start it almost starts but it doesnt any one have any ideas???

Any codes? A good place to start looking on a 7.3 is the ckp sensor.