in this video I want to take a look at a problem we are experiencing with the
vehicle during early morning start up or when the vehicle sit in park for over 12
to 24 hours we will always experience this kind of starter but first I want to
just turn the ignition key to the on position and I want to do this three
times the reason I'm doing this is I want the fuel pump to be engaged
providing pressure to the system so when the engine is cranked it will have
pressure at the fuel injector to help with a proper starting procedure since I
have my scan tool connected we want to verify our coolant temperature for the
engine so we are going to look at the ECT temperature and we can see it says
that's eighty four point two degrees this is verifying for us that the engine
is in cool or cold operation mode which is most likely a closed mode for the ECM
let's cycle the key off and on again now we're going to start the engine I want
you to pay attention to the RPM gauge I want you to notice how the RPM fluctuate
outside of its recommended rpm range
so you notice how that needles sat at a little bit above 500 rpm you could say
500 rpm well that is not good because sometimes it will even get worse than
that sometime the needle will sit below that 500 RPM mark now this is what we
want to experience we want our rpm to be in that location when we start the
engine instantly we do not want the RPM to hover at 500 rpm and then gradually
increase to the point of 1,100 rpm any time the engine idle below 500 rpm in a
early morning startup what is going to happen is that oil is not getting to
essential parts like the piston ring and the camshaft journal or the crank shaft
journal reason being is because the while pump is not being spin fast enough
to provide that volume and pressure to wear and tear parts once the engine
increased to 8,000 rpm then that oil pump will be able to provide adequate
oil pressure and volume to all the friction parts we are now going to
provide a remedy for this sluggish startup or low rpm startup which is
detrimental to engine wear and tear parts this type of startup will reduce
the life expectancy of the engine if it continues and never render itself we
have just completed a test drive with a vehicle and you will be able to verify
that by looking at the odometer mileage what I want to do now is I want to shut
the vehicle down sensor sail open-loop as we can look at our scan tool we'll be
able to see the engine coolant temperature is approximately 186 187
degrees so what I want to do now is I just want to shut our engine down and
then I'm going to restart it to see what kind of startup we're going to get this
time
and that's a normal start of that we should get at all time hot or cold no
matter the temperature of the engine now we must go and provide a remedy for this
problem because it only seems to happen in the closed-loop mode which is when
the coolant temperature is at its lowest and not an open-loop mode when the
temperature is at its highest so again we could look under scan tool and what I
want to do is again I want to check over short term we will trim always want to
check the short term fuel trim and that's pretty close you want to get it
into the zero so now let's go and see what is the problem with this coal
engine startup ok now let's take a look at our temperature device that's
recording our data for the ECT and ECM will be this sensor right here that that
will be a double pane sensor is exclusively for the computer and our
scan tool to record coolant temperature
this sensor is for the gauge cluster it is a single pin temperature sensor wire
we must also remember to never apply or press the accelerator pedal when
starting the engine if you need to do so it may be a sign that something else is
wrong with the engine causing problems we must remember we're only experiencing
this problem at coal starting or when the vehicle halves it for a long term I
will now turn the key off turn it on
and you can see we have restore our rpm or coolant temperature still within
range that's 86 degrees
this is where we want the RPM gauge to be when we start the engine at cold
temperature or weather condition at this rpm the engine oil is able to get to all
the essential friction parts to prevent excessive wear and tear during stardom
it is important that the engine part receive adequate amount of oil during
cool startup sometime you will notice a smoke from the tailpipe
this will caused by excessive piston wear and tear promoting blow by robbing
combustion so you can look in the video description link and how to render this
problem we will also show you necessary tools and how to change the part for
solving this cold start sluggish engine startup also notice in our video we do
not have a check engine light so this is a problem that the ECM will not be able
to detect also a scan tool will not provide you with any code to solve this
problem this is a issue that must be rendered based on mechanical experience
and understanding of the internal combustion engine in its fuel efficient
in its fuel injection mode we have had the engine idling for approximately 2
minutes now so it could restore its median temperature range you will also
notice that the RPM is exactly where we want it to be and we will now take
another look at our scan tool and we can see our engine coolant temperature is
177 178 degree fahrenheit so what I want to do now when we look at the short term
fuel trim you will see it a negative 3.9 negative two point three
which is good that's on the negative side which means it's taken away some
fuel from the system to keep the engine running at a perfect air fuel ratio
I will now step on the brake and place the shifter and drive and hold the
vehicle steady and maintain observance of that short term fuel trim and we can
see it remain within its recommended range which will be close to zero so
since we have a one point six three point one negative this is perfect for
the short term fuel trim this also let us know that the engine is not
experiencing any vacuum leak or excessive fuel dumping so this will
bring us to the end of our video we can see we still maintain a perfect idle at
750 rpm with the temperature at its median you can also verify our test
drive by the odometer reading in your case the coolant temperature is going to
exceed to approximately 210 215 degree but in our application the highest it
will probably see is 194 degrees since we have made the necessary modification
for lowering the coolant temperature to increase and promote longevity to engine
performance and oil viscosity individual description are links for how to Ward
engine temperature and increase its efficiency
okay so we were able to complete another test-drive as you can verify from the
odometer mileage what I'm going to do now is I'm going to shut the vehicle
down and you can see the temperature gauges in the middle I'm going to
perform a restart and as normal it starts like it should but this is what
you want to accomplish you want to always make sure when the vehicle is
started that RPM gauge jumps up to approximately 1,000 rpm and then it
should set itself back to the recommended 750 rpm so basically what we
have done is basically we have provided a remedy for our sluggish startup by
replacing all the vehicle media that we'll be replacing either the air filter
or the fuel filter because these are the two only two media that could restrict
the system during coal startup you must also check the throttle body for carbon
buildup which sometime will need cleaning carbon deposits on throttle
body blade will lead to the same symptoms that you are experiencing in
this video so you want to replace the gasoline fuel filter or in some case
diesel you also want to replace the air filter and you want to clean the
throttle body you also want to check your spark plug and this is going to
lead you into performing a whole complete tune-up basically replacing
your PCV valve wires if the vehicle is equipped with any ignition spark plug
wire rotor cap rotor coil basically at a hundred thousand miles these are the
things are going to have to do to keep your vehicle running at optimum
condition and performance but the media replacement must be done frequently and
always check when you're replacing the engine oil and its filter remember the
oil filter is also another media for the oil lubricating system thank you
for watching the video and see you again in another one of our complicated and
technical video that we hope you can figure out good luck and thank you okay
so here's a bonus for you I have my scan tool set up in the most important
parameters that I usually monitor and those parameters are that will be short
term fuel trim bank one that will be the manifold right side sensor oxygen sensor
short term fuel trim bank two that will be the left side manifold oxygen sensor
I also like to monitor the vehicle speed that's for your benefit because I can't
hold a camera at the poster and the tool at the same time while driving
another good parameter to look at is spark advance timing and then we're
going to look at the intake air temperature sensor that's the IAT
temperature sensor I also want to look at the DPS sensor that's for your
benefit
that basically is going to tell you what position the throttle is in so you can
relate to an RPM because it's nearly impossible for me to hold the camera at
the tool and the cluster driving at the same time so what I want to do now is I
want to just come to a complete stop because we're going to perform a full
throttle test to verify performance so you're going to look at the TPS sensor
now we can research our data to find out if we're losing performance in any one
of the parameters but based on our check engine light that does not display on
the cluster it means everything is okay but from looking at the timing the
distributor can be moved in the advance position to gain more power this must be
done to ensure that the computer does not detect any knock from the knock
sensor any knock sensor code will be a p0 327 or a p0 328 any time you receive
a knock sensor code during maximum or full throttle acceleration that is a
sign that the timing is too advanced or you're experiencing a vacuum leak
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