Hi, I have a 1999 Dodge Ram Van 1500 3.9L that won't start. The engine turns but
happens. I have had the starter and alternator checked and they are ok. I have
plugs, rotor and distributor cap but still didn't help. I checked the fuses and
all are good. I
sprayed ether into the carb and it did not help either. I have spark going to
the plugs so that
isn't it. Does anyone have any ideas that I might try?
Something still doesn't make sense. I have read down the list of responses
and you indicate that everything tests good. Please elaborate on how you
are testing and the test results.... something is missing here....
I took the starter and the alternator to Autozone and they checked them there
and were ok. I
put a brand new distributor cap, rotor button and plugs on. I hooked one of the
plugs to the
plug wire and had sparks to the plug. I used a volt and ohms meter to check the
switch and it was ok. My neighbor came over and pulled the codes off his
computer and there
were no codes. Took the front part of the engine off to check the timing chain
and it is in
good shape. My fuses looked in good shape. I checked the coil with the ohms
meter and it showed
good. I checked with a pressure gauge for fuel pressure at fuel rails and it is
Thanks for helping. I am stumped over this one after being a mechanic for over
As you obviously well know, three things are required for an engine to run,
fuel, air and spark and you seemingly have all three... then why no go?
That's the puzzle. I am curious as to why you would bother to have the
starter and alternator tested if the engine cranked over though. Firstly, I
would check the engine with an old fashioned timing light to see if the
engine is firing when it should. Secondly, a volt-ohmeter test is not
always valid for a coil or crank position sensor but "if" you are getting
fire, then these are seemingly good. A scan tool can show no fault codes
and there still can be a latent problem. The only thing you haven't checked
is compression which should be done next.
Does this van have the anti-theft (code LSA) unit installed?
They have been known to fail and prevent the engine from starting. It
will still show spark but the ECM won't let it run.
There is an info sheet on it.
I am sorry for not getting back sooner but I have not been online due to working
I check the compression on one cylinder and it had 120 pounds so I figured the
rest would be
the same or about the same. I had the alternator and starter checked just to see
if good and to
If you really have a good strong spark, then the 4th dimension for an engine
to function is combustion, which is touched off with the spark at the right
moment in a gasoline engine... Did you ever have it running or everything
before you messed with the wires & dist cap? it is so easy to be "1" off on
the cap for the wires, I would triple check that, and if you crimped your
own... especially if you had any running before you worked on it. I cant
believe it didn't at least try to fire with ether, but the ether sold in
stores now days (because of the "huffers" and those that blow heads off of
cars, and flash fires up the carbs) is like 2% milk, mostly anything but
ether, just like the milk...
I had just driven to the Meijers just a few blocks from home and when I went to
leave is when
it would not start. The van ran good until then and showed no signs of quitting.
I had to have
it towed home. Thanks for your thoughts. I still have not figured out what is
wrong and I need
it for work.
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