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stevedak
Dodge Dakota
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10/07/2008
22:54:42
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 Subject: ODB code 1391
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I have a 2002 Dakota with 4.7 ( I know this is the V6 forum but the 4.7 is so close to the 3.7, someone here may be able to help). I bought it not running. I Replaced a head and timing gears, timing chains, guides and tensioners. Now it won't run. Have code 1391 set (intermittant signal from cam sensor or crank sensor). Went back and checked the valve timing, its good, good compression too. Fuel pressure is good. Sprayed starter fluid into the TB, it sputtered but didn't start. Good continunity from cam sensor to PCM and from crank sensor to PCM. Replaced the cam sensor, still no start. changed the crank sensor, no start. I've check the grounds, to engine block, from heads to firewall, from firewall to fender well. I can't find any loose or bad connections.
I've read a few posts where people have had the same problem, even after replacing cam and crank sensor, but I've never read what finally corrected their problem.
Has anyone encountered this? Can anyone give suggestions?
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stevedak
Dodge Dakota
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10/08/2008
18:18:37
| RE: ODB code 1391
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I may be onto something. Is anyone familiar with NGC (new generation controller)? It appears vehicles with NGC have the exact same cam gears (number of teeth, TDC orientation) but the tone wheel is different. I still have my old cam gear, it is not NGC. I dug up some info that suggests my timing kit is for a vehicle with NGC. Although I verified the parts store gave me the kit that is listed for make, model and year, it may still be incorrect. Looks like I need to check my set-up, I'll add another post with what I find.
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harry from ct
Dodge Dakota
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10/08/2008
20:30:25
| RE: ODB code 1391
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ya got a bad crank sensor!!!!!!.....i had 3 that i bought from advanced auto parts.....junk........get one from the dealer/////
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stevedak
Dodge Dakota
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10/15/2008
07:01:21
| RE: ODB code 1391
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Turns out the timing kit had the wrong cam gear. The tone wheel had the wrong whole pattern. Parts store got a new gear. I installed and it started right up. When you replace your timing set, besides checking that you have the right number of teeth on the gear, you gotta check to see that the tone wheel has the right pattern compared to your old one.
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harry from ct
Dodge Dakota
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10/15/2008
19:04:13
|  RE: ODB code 1391
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well ya didnt tell us you cant count lmao
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