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  #11  
Old 11-05-2011, 06:57 AM
ryand73 ryand73 is offline
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i too seem to be having the same problem i changed the iac valve and that doesnt seem to be the problem either but if you take the filter off to show the thottle body it seems to be sucking for air at the iac why?
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  #12  
Old 11-10-2011, 05:26 PM
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ramfam ramfam is offline
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Do these trucks have a spark module in distrbutor cap? My s10 did the same thing and that was it.
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  #13  
Old 06-29-2012, 12:16 AM
ryand73 ryand73 is offline
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you mean a pick-up coil just under the rotor yes sorry it took so long id get on but i never seen any notices anybody else posted just found out can pull thread up by going to your page yes changed pickup coil crank shaft sensor distrib cap rotor wires plugs had manifold gasket changed iac tps map coil water temp sensor air charge sensor all replaced last year and a half still hearing the sucking sound and now getting a misfire on 1 3 5 been running obd2 tool on it misfire starts at5 and works way down this is getting frustrating anybody know whats going on thank you also forgot to mention new o2 sensors and cat

Last edited by ryand73; 06-29-2012 at 12:20 AM.
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  #14  
Old 06-29-2012, 01:17 AM
emjohn4 emjohn4 is offline
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It is likely your 02 sensors. I know you said you replaced them - but did you use Denso sensors?

I fought this exact same problem for a number of months.

See my story here: http://www.dakota-durango.com/forum/...d.php?t=140847
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  #15  
Old 06-29-2012, 10:23 AM
ryand73 ryand73 is offline
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When I changed the o2 sensors It changed froma rough idle to a smooth idle but now when im driving it will misfire and seem to lose power when I let off the gas sorry should of mentioned that last night no I did not use the denso o2 sensors ngk
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  #16  
Old 06-29-2012, 11:55 AM
emjohn4 emjohn4 is offline
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Quote:
Originally Posted by ryand73 View Post
When I changed the o2 sensors It changed froma rough idle to a smooth idle but now when im driving it will misfire and seem to lose power when I let off the gas sorry should of mentioned that last night no I did not use the denso o2 sensors ngk
I know it sounds petty, but it isn't - the o2 sensors must be Denso.

I went through three o2 sensors before I finally broke down and bought Denso's. It cost me a lot of headache, and money, troubleshooting the problem, while ignoring the advice I received about the sensors needing to be Denso.

Until you change the sensors for Denso's, you're just pissing into the wind trying to troubleshoot this.

There are only a few things that can be wrong (pending plugs/wires/cap are all in good condition): cam position sensor, crank position sensor, fuel sync, coil, 02 sensors, fuel pressure (pump).

If the crank position sensor is bad, the truck won't start.

If the fuel snyc is out of wack, the truck will sputter and backfire. This only would be bad if you loosened the distributor and started rotating it.

If the cam position sensor is bad, it should run like crap all the time.

If you have low fuel pressure, the truck will fall on it's face and run poorly (have you checked your fuel pressure?).

If the o2 sensors are bad, you'll get symptoms as you describe.

I can't promise 100-pct confidence that is your issue without seeing/driving your truck, but I'd be 80-pct (or better) confident it is.
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  #17  
Old 06-29-2012, 04:55 PM
ryand73 ryand73 is offline
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ok ill try that first i hope thats all it is it would make sense this truck is really picky on what it gets thank you guys i will check summit and see if they have denso if not it will have to wait a couple weeks til my next pay
money has been last couple monthsthank you guys again when i get them on i will let you know
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  #18  
Old 06-29-2012, 05:01 PM
emjohn4 emjohn4 is offline
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Quote:
Originally Posted by ryand73 View Post
ok ill try that first i hope thats all it is it would make sense this truck is really picky on what it gets thank you guys i will check summit and see if they have denso if not it will have to wait a couple weeks til my next pay
money has been last couple monthsthank you guys again when i get them on i will let you know
Check out www.rockauto.com

If you peruse the boards at that "other" link, there is a 5-pct discount coupon as well.

http://www.rockauto.com/dbphp/x,cata...o_2344077.html
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  #19  
Old 06-29-2012, 05:35 PM
ryand73 ryand73 is offline
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thank you i always forget to check there now should i replace both the up and down stream or just the upstream both are ntk sensors i think i put ngk earlier
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  #20  
Old 06-29-2012, 05:37 PM
emjohn4 emjohn4 is offline
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Quote:
Originally Posted by ryand73 View Post
thank you i always forget to check there now should i replace both the up and down stream or just the upstream both are ntk sensors i think i put ngk earlier
Upstream(s) only.

The downstream does do long term fuel trim and monitor cat efficiency, but the upstream does the air/fuel trim and monitoring.
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