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post #1 of 5 (permalink) Old 12-16-2010, 02:21 AM Thread Starter
<--501cc,should b 540 : /
 
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P1670

My truck wouldn't start earlier, it was cranking like mad as it had been running 15min before, however it didnt fuel,so I poped the hood did a quick check, all looked good. I pulled codes at home and go a P1670 Which was something about a sensor not sending a signal or something generic. However it didn't mention which one, how do I figure out what sensor is giving me trouble?

Early '99 ccsb 7.3l 4x4 6spd
All Stock Except
Air tank rear bumper
Brush guard w/ fog and driving lights
seat covers
after market floor mats
Fancy Halogen headlight bulbs
Rear license plate light is out


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Those hairy bastards are scary up close!

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with all the smoke, power and wheelie popping you might accidently park on a honda
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post #2 of 5 (permalink) Old 12-16-2010, 02:28 AM
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Re: P1670

P1670 EF Feedback Signal Not Detected

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99 F-450: ccfb Boss v plow. 6 speed 5" ex,EB
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I change my HPOP oil, the oil does circulate with the regular oil, it doesn't cycle as often and does get dirty sooner.
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post #3 of 5 (permalink) Old 12-16-2010, 02:37 AM
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Re: P1670

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, IDM powering circuit, PCM

Check for other codes. Key on, engine off.

l Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
If DTC P1298 is also present, REPLACE the IDM.

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i have a couple friends that went balls deep in wyotech and when they got out they couldn't poor piss out of a boot if you put the directions on the sole
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post #4 of 5 (permalink) Old 12-16-2010, 03:34 AM Thread Starter
<--501cc,should b 540 : /
 
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Location: SW Colorado
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Re: P1670

Quote:
Originally Posted by PSDEng View Post
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, IDM powering circuit, PCM

Check for other codes. Key on, engine off.

l Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
If DTC P1298 is also present, REPLACE the IDM.
Thanks guys!

I did the IDM mod a few months back, I wonder if this is related. This must be why it wasn't getting fuel and starting earlier. After a minute or so it worked for the hr or so it took to get me home, so maybe a sporadicly loose connection?

Early '99 ccsb 7.3l 4x4 6spd
All Stock Except
Air tank rear bumper
Brush guard w/ fog and driving lights
seat covers
after market floor mats
Fancy Halogen headlight bulbs
Rear license plate light is out


Quote:
Originally Posted by erikclaw View Post
Those hairy bastards are scary up close!

Quote:
Originally Posted by fordfreak4life View Post
with all the smoke, power and wheelie popping you might accidently park on a honda
'99 stroker is offline  
post #5 of 5 (permalink) Old 12-16-2010, 04:40 AM
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Re: P1670

I just had the same issue, check your batts, batt connections, idm connections. My issue was i had 1 dead battery, i was throwing codes p1668 and p1670. Since i changed my batts i haven't gotten those codes. Good luck

Early 99 7.3 2wd
Old truck with all the bells and whistles....

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Anyone who stands to pee drives a 7.3.
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