New injectors rough idle.

littleredstroker · Jun 16, 2012

Installed injectors a few weeks ago. Ran about 800 miles through em with a new oil change. On first start up truck starts immediately followed by about 6-8 seconds of a rough idle then it smooths out, it doesny idle rough but the Rpms randomly go up or down a few hundred. Any ideas
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littleredstroker · Jun 16, 2012

Will also add that even in high idle setting it does this

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dentexpowerstroke · Jun 16, 2012

Does it kind of have a romp to it?

littleredstroker · Jun 16, 2012

No not the the 6ohs. Like 4-5 seconds at idle then 6-7 at 850, then back to 750 for 6-8 then jusy keeps going like that . Constantly all over the place

dentexpowerstroke · Jun 16, 2012

I know mine sounds like singles firing for the first few seconds then clears up.

littleredstroker · Jun 16, 2012

Mine are singles lol.

Arisley · Jun 16, 2012

Can you check ICP, might be an HPO issue.

dentexpowerstroke · Jun 16, 2012

Mine are singles too but they only idle like that at first that why i was wondering if thats the issue you were having. like arisley said check icp mine did weird stuff when mine was bad

Arisley · Jun 16, 2012

dentexpowerstroke said:
Mine are singles too but they only idle like that at first that why i was wondering if thats the issue you were having. like arisley said check icp mine did weird stuff when mine was bad

Yeah, I am still wondering why my AE would not connect to your truck.

Groomzybanshee · Jun 16, 2012

My ae won't connect to half the obs I try.. Try unplugging the icp sensor and see how it idles..

Curtis@Vision Diesel · Jun 16, 2012

Groomzybanshee said:
My ae won't connect to half the obs I try.. Try unplugging the icp sensor and see how it idles..

Same. Eventually we can get it to connect though. Wonder why that is?
Back to the OP, do unplug the ICP, make sure there is no oil in the connection and see how it idles.
Also not sure what injector size you were running before, but did you have your chip re tuned? Sometimes just some minor tweaks in PW can really help @ an idle.
Also if you have anyone in your area with a scan gauge try using one of them. We have never had an issue not being able to connect with a scan gauge.
Good luck

littleredstroker · Jun 16, 2012

New adrenaline ipr and icp last summer. Will try in plugging it. Once its warmed up idles a lot smoother. But still not perfect. Got the tunes with the injectors, had a superslip before

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TARM · Jun 17, 2012

Curtis@Vision Diesel said:
Same. Eventually we can get it to connect though. Wonder why that is?

A guess would be that the voltage at the power pin on the ODBII port may not be perfect. Talking with the chief tech at AE it is very sensitive to this apparently.

SDS97_7.3 · Jun 17, 2012

Curtis@Vision Diesel said:
Same. Eventually we can get it to connect though. Wonder why that is?
Back to the OP, do unplug the ICP, make sure there is no oil in the connection and see how it idles.
Also not sure what injector size you were running before, but did you have your chip re tuned? Sometimes just some minor tweaks in PW can really help @ an idle.
Also if you have anyone in your area with a scan gauge try using one of them. We have never had an issue not being able to connect with a scan gauge.
Good luck

Mine did that, would connect half the time. Then I started to turn off everything, radio, vents etc.. no problems after that.

Bean · Jun 18, 2012

What kind of oil are you running?

littleredstroker · Jun 18, 2012

Bean its rotella.. I read your post just the other day on oil I want to stay with conventional oil cause my theory is oil is supposed to clean, so if your oil doesn't get dirty for 10k miles is it cleaning like It should? Regardless. There is no place in my town that sells any kinda schaffers anything.. I tried looking on their website but got completely confused by which additive is for what.

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Curtis@Vision Diesel · Jun 18, 2012

littleredstroker said:
Bean its rotella.. I read your post just the other day on oil I want to stay with conventional oil cause my theory is oil is supposed to clean, so if your oil doesn't get dirty for 10k miles is it cleaning like It should? Regardless. There is no place in my town that sells any kinda schaffers anything.. I tried looking on their website but got completely confused by which additive is for what.

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Additive is something you could try. But with a re-tuned chip to your new injectors and the truck never did this before these injectors, I would make sure your HPOP is not the problem here. If your wanting to try some Shaffers send us a PM and we can help you out.
Let's get to the bottom of this problem and get your truck to idle correctly.

Bean · Jun 18, 2012

Try a different oil even if its dino oil. Try Delo or Motorcraft atleast. What you are describing is exactly what we could not tune out of a truck with Rotella in it.