TY#345 1st Datamaster Run

[turbodig]

Re: TY#345 1st Datamaster Run

I ran DM with the engine off and got 100%TPS easily. I did three runs and could not get over 83%. I must have been doing something wrong.

Also, with the engine off, I can here the intercoolerr pump running and I supppose it feels like there is coolant running through the lines (they were changed to soft lines) BUT I cannot visually see coolant running through the upper IC when I peak inside. Should you be able to see coolant flowing? Every once and a while the pump would make a different noise and the coolant in the upper IC would bubble just the slightest bit. Clog somewhere maybe?

Sounds like air in the system.

Stock chip in it? Target boost is a function of TPS on the stock chips and many of the aftermarket ones.
This can make boost do odd things.

I would look for things rattling, or a broken motor mount.

Plugs gapped at... ?

Catcon still in it? Exhaust restriction or intake restriction someplace?

Tough to tell from narrowband, but you may have some lean spots along the way, there.

A lot of your knock is caused by the slow recovery of whatever chip you have in there. Watch the counts- you get short, large bursts of counts, then nothing. Most of your knock count events are tied to a shift, or the initial stomp. This is what makes me want to look at a loose motor mount.

The one at about 68 MPH appears real, and is likely due to your IC temps and/or a fueling issue. You have a bit of ignition jitter, but nothing crazy.

 

[blazinmt]

Re: TY#345 1st Datamaster Run

Sounds like air in the system.

Stock chip in it? Target boost is a function of TPS on the stock chips and many of the aftermarket ones.
This can make boost do odd things.

I would look for things rattling, or a broken motor mount.

Plugs gapped at... ?

Catcon still in it? Exhaust restriction or intake restriction someplace?

Tough to tell from narrowband, but you may have some lean spots along the way, there.

A lot of your knock is caused by the slow recovery of whatever chip you have in there. Watch the counts- you get short, large bursts of counts, then nothing. Most of your knock count events are tied to a shift, or the initial stomp. This is what makes me want to look at a loose motor mount.

The one at about 68 MPH appears real, and is likely due to your IC temps and/or a fueling issue. You have a bit of ignition jitter, but nothing crazy.

I have a stock chip. I also forgot to mention a 3" exhaust (how do you determine an exhaust restriction?).

BTW the actual file is now on page one towards the bottom of the page if anyone wants to take a closer look.

do you got soft lines or all metal lines? it's a pita but common sence will get you there

They are all soft.

 

[blazinmt]

Re: TY#345 1st Datamaster Run

Today I ran DM while just driving around town (I stayed out of boost as much as poss. today) I just wanted to point out a few things to clear it up for myself:

1) While driving out of boost or maybe just barely into boost <1lb (also speed is <45mph) I have absolutely ZERO spark retard or knock. (Does this mean anything in my case or are all trucks asymptomatic while not in boost?)

2) I was able to get 100% TPS while driving around (just punched it real quick to see).

3) I checked all my IC lines (no kinks) and I actually got to 'burp' some air out and now the coolant is flowing in the upper IC. (However, I do not know how turbulent the flow should be.) While driving around <45mph with MINIMAL boost <3lbs, my IA temps jump right to high 120s. While coasting they drop within 1 second down to around 112-115. I have read that temps should be 10-20 degrees above ambient air temps.

Since I now have coolant flowing, what would the cause of the high temps be? Gunked up upper or lower IC?

Thanks!

 

[turbodig]

Re: TY#345 1st Datamaster Run

Today I ran DM while just driving around town (I stayed out of boost as much as poss. today) I just wanted to point out a few things to clear it up for myself:

1) While driving out of boost or maybe just barely into boost <1lb (also speed is <45mph) I have absolutely ZERO spark retard or knock. (Does this mean anything in my case or are all trucks asymptomatic while not in boost?)

2) I was able to get 100% TPS while driving around (just punched it real quick to see).

3) I checked all my IC lines (no kinks) and I actually got to 'burp' some air out and now the coolant is flowing in the upper IC. (However, I do not know how turbulent the flow should be.) While driving around <45mph with MINIMAL boost <3lbs, my IA temps jump right to high 120s. While coasting they drop within 1 second down to around 112-115. I have read that temps should be 10-20 degrees above ambient air temps.

Since I now have coolant flowing, what would the cause of the high temps be? Gunked up upper or lower IC?

Thanks!

That's generally the case, or bent/plugged fins. (given that the system is working otherwise)

 

[WyoSyclone]

Re: TY#345 1st Datamaster Run

If the truck has had antifreeze in the intercooler system, and it hasn't been changed in a long time, it will turn into what looks like jello in various places. The previous owner of my Sy let it sit for a long time after the resto and this is what happened to my intercooler and CAC... I just took everything off, used a variety of cleaners inside (409, foamy engine degreaser, oxyclean, anything I could find that was safe on aluminum) and just kept soaking and cleaning till all of that crud came out - best thing I ever did. IATs dropped 40 degrees!

What were the ambient temps during your DM runs?

 

[Jimmy]

Re: TY#345 1st Datamaster Run

If the little rubber flap isn't on you IC radiator,it will not have much air being directed into it,and that can lead to higher temps.

 

[blazinmt]

Re: TY#345 1st Datamaster Run

What were the ambient temps during your DM runs?

Temp was about 70

If the little rubber flap isn't on you IC radiator,it will not have much air being directed into it,and that can lead to higher temps.

It still has the rubber flap, I smash my nose across it every time I try to crawl under it while it's on the ground. I have been searching high and low for a black container big enough to make a scoop but have yet to find a black one big enough.

 

[WyoSyclone]

Re: TY#345 1st Datamaster Run

Just noticed your temp sensor may be bad.... engine reads 139 throughout that whole run... then a data error at #122 with the temp blipping up to 160. No way the engine would stay constant during a run like that. I'd do some digging on that one.

 

[blazinmt]

Re: TY#345 1st Datamaster Run

Just noticed your temp sensor may be bad.... engine reads 139 throughout that whole run... then a data error at #122 with the temp blipping up to 160. No way the engine would stay constant during a run like that. I'd do some digging on that one.

Nice catch, I didn't even notice. You are talking about ECU temp sensor correct? Although I did notice that my gauge is not working properly either.

 

[The Devils Own Chariot]

Re: TY#345 1st Datamaster Run

To much fuel can cause false knock.
You have air in your intercooler lines. I had that problem all the time. It will severly hinder performance with no coolant flow. You will get burps of collant and it starts to flow. But then it may stop again. I got really sick of the stock intercooler and switched to A2A. Less moving parts and heat soak. You may have multiple problems going on at once.
Where are you located?

 

[blazinmt]

Re: TY#345 1st Datamaster Run

I checked my timing today. Here is my rendering of what it looks like. The timing mark SHOULD be right in the middle of the farthest valley to the right correct?