11-19-2015, 02:19 AM
Vsig: 96, 8v , Spanish made (Santana factory) with DLC moved from battery front to RF head light shell rear, like our 96s but ours are all 16v.... my DLC page cover that......
so...
if the pinch test fails , duty cycle can never be set.!
when the pinch test fails, that means there is at least 1, large vacuum leak.
that TB air horn gasket, which one?
the one in the center of the TB must not be cracked, but is not , the TB is new.
what the air horn gaskets only keep out dirt, in the induction and do not change idle speeds or effect duty cycle ever.
the 8v fails pinch test for the following.
all vacuum leaks below the TV (throttle valve buttery fly plate)
TV plate not closed 100% for any reasons what so ever, at idle, Dashpot is retracted now.
vacuum hoses. leaking, any or all.
TB base gasket leaking
the TB base gasket missing or cut by and the the cutter, man allowed the 5 small hole there to be OPEN, (wrong) they must be closed, off.
this 5 holes are factory drilling's (they are called) that create internal passages, when manufactured, and most be closed.
brake booster leaks. (some do , randomly , each brake pedal movement, common on old cars this, easy to proof, block the booster hose)
EGR base gasket leaks, or EGR main cracked in half, as they are loth to do.
intake manifold gaskets bad. (or missing)
IAC stuck open, its new, but the water hose sure can be clogged, and ISC is not at 180F (IR guns show, 170f about)
as long as the car has vacuum leaks , any other steps is useless,. Idle speeds, spark timing, and duty cycle setting.
totally useless.
the 8 races for any and all vacuum leaks, and zero are allowed, (tiny yes, but not if it raises idle beyond ISC controls)
tests? (hot engine all)
with the HOT idle bleed screw turned fully CW, In, what is rpm now hot? not pinched, (can be 800 or rpm drops greatly as ISC loses control)
then
with the bleed screwed in, what is RPM now hot, then ISC hose pinched. engine must stall.
with bleed unscrewed, fully , (out removed) the pinch test usually does 400 rpm. at least. the bleed is the only air supply (pinched)
if doing DUTY cycle setting with leaks (vacuum)
you will see that the ISC is dead,
or can not get near 50% (with leaks the duty will be closer to 0%)
this is because the ISC can not close farther that 100% once closed, the duty is stuck at 0% (limited)
so...
if the pinch test fails , duty cycle can never be set.!
when the pinch test fails, that means there is at least 1, large vacuum leak.
that TB air horn gasket, which one?
the one in the center of the TB must not be cracked, but is not , the TB is new.
what the air horn gaskets only keep out dirt, in the induction and do not change idle speeds or effect duty cycle ever.
the 8v fails pinch test for the following.
all vacuum leaks below the TV (throttle valve buttery fly plate)
TV plate not closed 100% for any reasons what so ever, at idle, Dashpot is retracted now.
vacuum hoses. leaking, any or all.
TB base gasket leaking
the TB base gasket missing or cut by and the the cutter, man allowed the 5 small hole there to be OPEN, (wrong) they must be closed, off.
this 5 holes are factory drilling's (they are called) that create internal passages, when manufactured, and most be closed.
brake booster leaks. (some do , randomly , each brake pedal movement, common on old cars this, easy to proof, block the booster hose)
EGR base gasket leaks, or EGR main cracked in half, as they are loth to do.
intake manifold gaskets bad. (or missing)
IAC stuck open, its new, but the water hose sure can be clogged, and ISC is not at 180F (IR guns show, 170f about)
as long as the car has vacuum leaks , any other steps is useless,. Idle speeds, spark timing, and duty cycle setting.
totally useless.
the 8 races for any and all vacuum leaks, and zero are allowed, (tiny yes, but not if it raises idle beyond ISC controls)
tests? (hot engine all)
with the HOT idle bleed screw turned fully CW, In, what is rpm now hot? not pinched, (can be 800 or rpm drops greatly as ISC loses control)
then
with the bleed screwed in, what is RPM now hot, then ISC hose pinched. engine must stall.
with bleed unscrewed, fully , (out removed) the pinch test usually does 400 rpm. at least. the bleed is the only air supply (pinched)
if doing DUTY cycle setting with leaks (vacuum)
you will see that the ISC is dead,
or can not get near 50% (with leaks the duty will be closer to 0%)
this is because the ISC can not close farther that 100% once closed, the duty is stuck at 0% (limited)
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