What did you do on your 70 series today? (21 Viewers)

[bj70bc]

ya, air leak before maf or air blockage after it would be the suspect things, if im thinking correctly, imo

 

[Tanner H]

@NJ KZJ78 do you remember if you removed your smaller butterfly on the throttle body during the egr delete? Is the trundles adapter flat where the small butterfly would open? I think that version is for people that delete their smaller butterfly. Just thinking about it since that’s the only part you swapped out.

 

[NJ KZJ78]

@NJ KZJ78 do you remember if you removed your smaller butterfly on the throttle body during the egr delete? Is the trundles adapter flat where the small butterfly would open? I think that version is for people that delete their smaller butterfly. Just thinking about it since that’s the only part you swapped out.

Hey @Tanner H , think you are on to something. so here is where we are at: we bypassed the intercooler to see if the intercooler was the issue. We also did an air test and the flow was great. So we eliminate the intercooler being the problem.

Next: there is a small butterfly that remains from when we deleted the EGR system. It has two small solenoids on it. We found it was rubbing on the new trundles adapter we installed. We adjusted it slightly and even used zip ties to mimic that being removed. When we ran the engine it still emitted black smoke.

We tested for air leaks amongst all pipes. Everything is sealed tight.

We removed the new trundles adapter, and reinstalled the air intake pipe and disconnected the intercooler pipes… as if it was back to stock form. The engine ran great! No black smoke.

The only thing we are now thinking is the trundles adapter covers a small little hole at the throttle body/intake point. Perhaps the adapter we are using is the issue.

Suggest on next steps?

 

[NJ KZJ78]

i suggest bypassing the intercooler to trouble shoot first
if it is still doing this then you have a data point, ie you changed something else and it aint the intercooler

@bj70bc thanks man, so here is where we are at: we bypassed the intercooler to see if the intercooler was the issue. We also did an air test and the flow was great. So we eliminate the intercooler being the problem.

Next as tannerH suggested: there is a small butterfly that remains from when we deleted the EGR system. It has two small solenoids on it. We found it was rubbing on the new trundles adapter we installed. We adjusted it slightly and even used zip ties to mimic that being removed. When we ran the engine it still emitted black smoke.

We tested for air leaks amongst all pipes. Everything is sealed tight.

We removed the new trundles adapter, and reinstalled the air intake pipe and disconnected the intercooler pipes… as if it was back to stock form. The engine ran great! No black smoke.

The only thing we are now thinking is the trundles adapter covers a small little hole at the throttle body/intake point. Perhaps the adapter we are using is the issue.

Suggest on next steps?

 

[Tanner H]

@NJ KZJ78 Yeah makes sense.

So when your engine is running, that small butterfly valve is open. But since your trundles adapter is ''blank'', its forcing the smaller butterfly to stay closed and the engine is pissed.

The smaller buttery fly valve also helps for quieter ''shut downs''. If you remove the butterfly, it should solve your problem but be prepared to have a rougher shut down when you turn the truck off.

Long story short: If you remove your small butterly from your throttle body, your truck will run great with your trundles adapter. I set up my small vacuum line to keep the butterfly valve always open 100% of the time.

-or-

You can go with an ''EGR'' version that allows the small butterly to remain active and open like the two options below: