Have spark, fuel pressure, and no gas or water in oil
SOURCE: No gas to spark plug, but I have fuel pressure
sounds like you have no injection from the injectors check for a pulse at the injectors you can do this by getting a noid light from your local tool shop and plug it in and crankthe engine over if no pulse you may have a computer problem our a dissy module problem have you got spark at the plugs?
if so the dissy is ok and your computer may be faulty there are companies that can test your computer farly cheaply and if it is no good provide you with a replacment
SOURCE: 3.8 ltr pontiac - gas in oil,no detectable vacuum leaks, runs smo
yes, the diaphragm in the fuel pump has a small hole allowing fuel to seep into the crankcase, thus diluting the fuel and giving you low oil pressure...Change the pump and change the oil and filter.
SOURCE: low fuel rail pressure
who did a conversion on this truck???? the duramax is a common rail engine and can not handle wvo or sve. it will destroy your entire fuel system in no time on this truck. if you want to do a vo conversion you need to get a diesel with an inline injection pump or one of the older powerstrokes. i would suggest you quit trying to run wvo through this truck if you do not want to do a lot of very expensive damage
SOURCE: Will not start. Fuel pressure is 60lbs.
JUST BECAUSE YOU HAVE FUEL PRESSURE DOES,NT MEAN THE INJECTOR IS FIRING YOU COULD HAVE 100LBS PRESS. BUT IF PCM DOES NOT COMMAND INJECTOR TO FIRE IT WANT MATTER I SUGGEST HAVING NOID LIGHT INSTALLED @ INJECTOR CONNECTOR TO SEE
You turn the key to start and hear the starter
motor crank the engine, but when you release the key, the cranking stops and
there is silence. This means that the battery and starting motor are working
properly, but the engine is not firing. If you continue cranking the engine
over in this way, the battery will eventually run down and will need to be
recharged, but the battery and starter are not the cause of your problem.
There are a number of causes for this type of
no-start condition, the most common being that you are simply out of gas.
Assuming that you have fuel in the tank, you will need to go through a series
of tests to determine what is causing the problem. The testing procedure is as
follows:---
Spark:---------An easy way to test for
spark is with an inexpensive spark tester. This is a device that is readily
available at most auto supply stores. You use it by simply holding it next to a
spark plug wire. If you see the neon lamp flashing while someone cranks the
engine, then you have spark and should move on to checking for fuel. If there
is no spark, or a very weak spark, you will have to replace the spark plug or
the coil pack.It has to be checked.
Fuel:
First step here is to listen for the fuel pump
running inside the gas tank. When you turn the key to run, you should easily
hear the pump come on, run for a few seconds to build fuel pressure, then turn
off. If you do not hear it, it could mean that the fuel pump or circuitry is
bad. (Fuel pump failure is a common problem).
Fuel injected cars are very sensitive to proper
fuel pressure. If the pressure is off, even by a few pounds, it will cause
noticeable performance problems, or a no-start condition. To check for proper
fuel pressure, you will need a fuel pressure gauge that is suitable for your
type of system. Or you can also get the fuel pressure tested at local car garage,
If fuel pressure is low then its a fuel pump and fuel filter related problem.
Compression:
If you know that you have spark and fuel, the
next step is to check for compression. For this, you will need a mechanic's grade
compression tester that will screw into a spark plug hole. You will need to
remove the spark plugs and use the compression tester to test the compression
on each cylinder. If the compression is very low on all cylinders, that is a
sure sign that the timing belt (or timing chain depending on the engine) has
failed and will have to be replaced.
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This troubleshooting will let you know the problem.Thanks.
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