12-03-2018, 05:15 AM
the drop instantly fails the 1min rule. (all we know is 1 of 3 ways leaks so far) only one path leaking is bad, injectors, the others are inconvenient. (slower restarts)
so is.
1-leaking injectors
2-FPR leaks at key off, (bad FPR)
3- or the check ball in the pump is bad. (rusty?)
to prove FPR is ok, pinch the return line closed, and yell to key ,man turn off key. the pinch will cause 55 to 60PSI (called the pump shunt test)
key off the pressure holds to at least 25psi for 1min.
on new car the pressure will be higher for longer, do to zero leaks, or near.
the FPR working and the check ball not damaged.
lets the technician check for injector leaks.
one other trick is to unplug all injectors and see if the 1minute rule is cured, (bad ecu )
The injectors must not leak. the balance test on injectors finds this
but yours will fail, because the leakdown (general) test fails.
Try this, if say 1 injector leaks? (more testing, there are lots and lots of tests, for MPI)
take out all spark plugs
then keyon 5 to 10 times, if the injectors leak we see this by : use flash light pointed down the spark hole see raw liquid fuel bingo fuel leak.
i have 14mm bore camera (USB) that let me go inside the spark hole and see even better, even see, antifreeze liquid leaking.
Old cars like this can have good injectors but the check ball in the pump is bad, and or the FPR is old and leaks as most do this old.
making injector tests, 10x harder.
yes old cars can be a pain..
wish i had the spark tips information.?
so is.
1-leaking injectors
2-FPR leaks at key off, (bad FPR)
3- or the check ball in the pump is bad. (rusty?)
to prove FPR is ok, pinch the return line closed, and yell to key ,man turn off key. the pinch will cause 55 to 60PSI (called the pump shunt test)
key off the pressure holds to at least 25psi for 1min.
on new car the pressure will be higher for longer, do to zero leaks, or near.
the FPR working and the check ball not damaged.
lets the technician check for injector leaks.
one other trick is to unplug all injectors and see if the 1minute rule is cured, (bad ecu )
The injectors must not leak. the balance test on injectors finds this
but yours will fail, because the leakdown (general) test fails.
Try this, if say 1 injector leaks? (more testing, there are lots and lots of tests, for MPI)
take out all spark plugs
then keyon 5 to 10 times, if the injectors leak we see this by : use flash light pointed down the spark hole see raw liquid fuel bingo fuel leak.
i have 14mm bore camera (USB) that let me go inside the spark hole and see even better, even see, antifreeze liquid leaking.
Old cars like this can have good injectors but the check ball in the pump is bad, and or the FPR is old and leaks as most do this old.
making injector tests, 10x harder.
yes old cars can be a pain..
wish i had the spark tips information.?
http://www.fixkick.com