notlimah

Ok so the smoke at idle I’m getting is just a result of huge injectors on stock turbo along with OEM fueling?

Basically my starting fuel needed to be around 85 then taper down to 72 by 4-5psi then start it’s climb back up to get the low tps stumble out, but that caused the truck to have haze/smoke at idle. Even with starting fuel at 68 it haze/smokes at idle but not quite as bad. Tried using valet to move around the percentage a bit which got me to my starting mark but there’s no way I can start at 85 @ 0psi and have a drive able truck with this setup unless you know some tricks? It was to the point where you couldnt see the smoke coming out of the exhaust but there was definitely smoke lol. Rolling on the throttle obviously creates some puffs or trails of black but it cleans up fairly quick.

Well went on a tuning drive. Not sure the truck is going to run like I want with this big of injectors and stock turbo. Maybe having the stockers rebuilt and putting those back in until I can get a bigger turbo.

Send some my way the if it’s only money! ?

Well?

I thought it’d been in D1 status already?!

Ok, I can do that but I’m already on the verge of being really smokey throughout the rest of the tune. WOT I have a black haze of smoke constantly. Seems like my only issue is down low so I don’t want to mess up the upper end of the fuel curve when the bottom is what needs to attention. Am I approaching that wrong??

So my fuel from 0-5 is 68/68/69/70/71/72. Would it be ok if I tried a flat fuel curve from 0-5 like all 72?

Damn, sorry to hear @JAG1

Ok got the injectors in and went for a test drive. Has a weird sound at idle when cold but it was the inital start up so we’ll see if it comes back. Dropping into reverse and then drive when cold almost kills the engine. Decent amount of white smoke for first 250ft when cold, never again. Has a slight stumble when the pedal is first pushed. Almost like it hesitates then goes fine once more throttle input is there. Otherwise she ran fine. Valve lash quieted things up a little I think and EGTs were fairly manageable, peaked at 1450 around 33-34lbs of boost on a pretty steep incline at 3/4 throttle. Any advice on tuning out the early tps stumble?

Ok, I’ll run it as is and see how it goes. Not trying to get it super fined tunes as studs and a new turbo are hopefully coming soon. Either way just looking for a conservative starting point being I’m studless with large injectors and stock turbo.

So you guys think the current timing curve I have it set too is no good?

Both technically, but once you hit 5psi in that scenario. For instance, if it were set to 5psi and tps to 25%, you’d have to meet both parameters before wiretap would work.

I don’t really care about cruise timing. More about what would be the best way to keep my timing numbers conservative. Current timing is set at 16/19/23/27/29

So what would be a conservative number for light throttle adv?

Installing some new injectors and wanted to double check some timing values with you guys. Setup is in the title, current timing values for the tune I’ll use are... max load timing offset - 2* low psi timing reduct - 5* timing reduct scaling - 50% light throttle timing adv - 2* light throttle load limit - 30%

Thanks man! I really like those, I hate trying to get things out of the front part of the bed. That 3rd step would be money!

You should only need one set. You’d do one at a time so you could know which terminal was affected. Bypass one and it starts then that’s your problem cable.

@Sycostang67 What step rails are those?

Not saying I wouldn’t, just seemed like that tune had the wiretap come on almost instantly, and with that big of injectors just seemed like it would smoke pretty bad down low with all the fuel even with the bigger turbo. Like I mentioned, not knockin it, just curious if my assumptions are right or wrong.

Yea not knockin it, just seemed like it’d smoke like a mother down low since your wiretap comes on with 2000us duration at 5lbs, which I imagine your turbo should almost always be above when moving. Was more of a question then anything critical of the tune. I’ll have a similar setup soon so was curious more then anything.

I doubt it’s any of those, the truck only has 9,3xx on it. I’m thinking it has something to do with warming the emissions crap or something but not entirely sure.

I have one at home, just using my dads 4th gen while we’re visitng and was curious about what it could be and if anyone had some insight.

I don’t have one I can use and no cels.