Stalling at idle

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IneedaSY

New member
I was having problems with my Sy stalling when it would sit and idle for any period of time and was running bad under boost. Well I ended up finding that the upper intake was loose and one of the mounting bolt holes was broke. So I was able to get a used upper intake and got that put on, but still the same.
I just got my datamaster working to, so I was able to record a file of my truck from start up till the time that it stalls. I'm not sure how to post up the file for everyone to look at though.
If anyone can tell me how to post it up and look at it to give me an idea of what could be causing it. The file was taken with the intercooler off. I didn't think that would affect the values to much though.

I figured I would fix the stalling problem first and that might fix the other problem.

Here is a list of things I replaced before I found the upper intake being loose to try and fix the problem:

NGK plugs
Msd 8.5 wires
Conrad cap and rotor
Accel injectors
checked for vaccum leaks
fuel pressure is set at 46 with vac line on
there is a few other things, but can't think of them off hand

Any help would be app. thanks
 
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IneedaSY

New member
for the most part the truck it stock
ultimate chip
manual boost controller
alky injection
no egr
thats all i can think of off hand
 
I

IneedaSY

New member
There is a few things on the datamaster file that I noticed. The STerm counts start out at 128, but slowly work there way down to the 80's after the truck has idled for awhile. I also noticed that my AFR tgt stays at 10.0 Even after the truck has warmed up it doesn't change. The truck starts up great, but after it sits for awhile and the idle comes back down the rpm will vary back and forth and it for alittle bit and then it stalls
 
TYRODD

TYRODD

My ass. Look at it.
Any codes?

What exactly is it doing under boost. missing, sluggish?

Try getting it back to stock..ie try playing with the U chip, disable it or something.

What are your o2 volts doing, does it stall in open loop mode?

What about your IAC.

I am not even 10% knowledgable at datamaster stuff, so puhleeez someone chim in. :)

If all else, try searching for "stall"/"stalling"
 
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IneedaSY

New member
No I'm not getting any codes. The O2's are cross counting pretty good back and forth. If I un hook the O2 sensor it will idle just fine all day. I don't have a 2 bar map to put it back to stock. IAC is in the 20's
 
T

tyfoo

New member
I have the same promblem to the t
do a search under my name and you'll see what i done
thers injectors and lower intake gasket going in this week i'll let you know
 
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