stalling out at 4K

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C2H5OH
Nov 12, 2006
255
0
0
fort fun, colorado
my car has this wierd issue with stalling out occasionly when i come to a stop. it happens when i gradually push the gas just enough to get the car to 4000-4500 RPM's the back off the gas the car just dies.
the cars just slightly modded and the entire engine was stripped down and rebuilt less the 10K ago. any suggestions
 
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C2H5OH
Nov 12, 2006
255
0
0
fort fun, colorado
MDCmotorsports said:
Boost leak or bad BOV.
Click to expand...
well that does make some kind of sense. riddle me this batman i have a slight hiss one the back side of the intake by some vacuum lines. this is also where my boost gauge is located and when i unplug the boost gauge and cap off the line the car will turn on bur immediately bog down and die that plus I can smell it going way rich
 
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C2H5OH
Nov 12, 2006
255
0
0
fort fun, colorado
no boost leak just took all the piping off and inspected each piece no boost leaks and BOV is working just fine. any ideas where to start looking for another leak
 
silvergsx623

silvergsx623

WIPLSH & HWY KNG
Oct 16, 2005
498
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0
39
Alabama
Do you have a pressure tester made yet?

just pressure test the whole system with it on the car. Easy way to find the leak.


When i first got my 89, it wouldn't hold any boost at all... lol! it had quite a few leaks.
 
thechori

thechori

supra-deprived
Oct 3, 2006
567
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0
35
houston
your BOV is probably the issue. when your AFM reads air that comes into the system it adds fuel to compensate for it, but when you blow off all that metered air into the atmosphere, the system runs rich for a moment and it drowns the engine out, probably what your car is doing
 
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C2H5OH
Nov 12, 2006
255
0
0
fort fun, colorado
thechori said:
your BOV is probably the issue. when your AFM reads air that comes into the system it adds fuel to compensate for it, but when you blow off all that metered air into the atmosphere, the system runs rich for a moment and it drowns the engine out, probably what your car is doing
Click to expand...
AFM is no more. im running a MAP ECU which takes care of the pesky AFM
 
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C2H5OH
Nov 12, 2006
255
0
0
fort fun, colorado
it was doing this befor i got the MAP-ECU installed. it started rite after my engine rebuild almost a year and a half ago. when the car was bone stock. just got finished with the ISC and im certin thats not the issue
 
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