Bigger injectors and cold starts?

[BigRedDiesel]

I've had my new injectors (238/100's) in since April 2013 and when we pulled the motor we did injectors, HPOP, studs, push rods, new tunes and a few other things I'm probably forgetting.

Even since then I've noticed that the truck is absolutely miserable when it's cold. And by cold I mean air temp below 50 degrees (which is not cold)

It shakes, sluggish and just grumpy. If I plug it in its absolutely fine, not a problem at all.

It has sat in the driveway not plugged in for 10 days. I went out to start it, let the glow plugs run for two cycles and it just cranked tried to start smoked like a freight train but wouldn't stay running. (Batteries are three weeks old)

Glow plugs were all replaced when the motor came out, GPR is working.

Is this common for larger than stock injectors? Does anything thing sound wrong. I've searched high and low but can't find any info on this. Looking for some advice or answers.

Currently 29 degrees outside now. The reason for all this is my concern of starting issues if I go somewhere where I can't plug it in...

 

[rustbucket]

I dont have any issues when its cold. How many miles is on the motor, any excessive blow by?

 

[hucorey]

What oil are you using? Could be in your fuel/IAT mapping too on your tunes. Do you have a 6pos ts chip? Try it in different settings.

Sent from my Galaxy Nexus using Tapatalk

 

[smoker00]

I think you have something going on there i have some big B's and it starts below 0 just fine..

238/100 should start just like stock ones..

 

[bruce]

Did it had problems before you installed those injectors? Maybe farmer sent you a bad set

 

[BlueScab]

Maybe a chicken bone in the fuel filter!

Mine does fine with 250/200s just a little smokey when it's cold.

 

[CurtisF]

I get a little extra white smoke for the first 30 seconds or so on cold mornings, then it goes to normal. Starts up in temps below 0 without being plugged in.

Injectors in sig.....

There are certain things in the tuning that can affect cold starts with larger injectors.

On the flip side, I have seen injectors smaller than mine that would have hard cold starts and/or tons of white smoke regardless of tuning changes.

Just some things to consider.

 

[CSIPSD]

I see one thing in his sig...

Bad issues with injectors will cause cold start issues. Oil clearances, fuel clearances...

Bet money, you switch injectors, your issue will go away.

 

[hucorey]

Maybe a chicken bone in the fuel filter!

Mine does fine with 250/200s just a little smokey when it's cold.

Mine's the same way.

 

[2dedge]

Pull you chip and try starting it on factory programming!

I had the same issues with one tuner and he said there was no way it was tuning related. I proved the truck started fine on Oem software and then he changed his story to it had to do with safety's he builds in blah blah blah. The new hydra with Bills tunes starts fine.

 

[UNLIMITED_DIESEL]

We see this all the time. It's more than likely a stiction issue with the poppet valves in the injectors or bad armature clearances. Rebuild those injectors and the problem will go away.

 

[PABowhunter]

Were the injectors fresh rebuilds or did you buy them used off somebody?

 

[BigRedDiesel]

Were the injectors fresh rebuilds or did you buy them used off somebody?

They were fresh rebuilds.

Using Rotella Synthetic oil.

 

[Tim @ P.I.S.]

We see this all the time. It's more than likely a stiction issue with the poppet valves in the injectors or bad armature clearances. Rebuild those injectors and the problem will go away.

:whs:

Just spoke to some customers in Canada recently. They are having no issues. Pretty sure it's below 50* up there.

I have seen tuning effect idle. But it's not nearly as common as injector issues.

 

[Worstenemy453]

If PIS and Unlimited say its injectors most likely then it's most likely injectors unfortunately. I would send them out to one of them or full force and have them take a look for you.

 

[big_stroker]

I have some smoke at idle when its 0 degrees outside on cold start for a few minutes then it goes away. I would agree with Nate at Unlimited with its an injector issue.

 

[lincolnlocker]

My dually will smoke like a freight train when its under 50° but it will only start good in 2 of the 6 tunes. No cold start issues either. Just a smokey pig for a bit..

live life full throttle

 

[V-Ref]

I've started at -35 with Unlimited 200% nozzled injs, and 907Dave even colder with 200% and 400%. You've got something mechanical going on (injectors, GP system, or weak HPOP)

Here's from a couple days after Thanksgiving. Not super cold, but you can see it starts and idles with very good manners. :fordoval:

http://powerstrokearmy.com/forums/showpost.php?p=847530&postcount=67

 

[JD3020]

My truck starts fine at any temp, but blue smokes till i get it out on the road, then it clears up within 30-40 seconds of driving. Need to work on the tunes a little and see if i can't clean it up.