coastincarl.DeleteThis@gmail.com wrote:
> Was running fine during routine shopping. When my wife came out of
> store the engine would not crank. Fuel is no problem it has new fuel
> pump. I have replaced crank and cam sensors, also plugged in new ASD
> relay to no avail. Changed coil pack. When I check the firing at plugs
> it hits ONE HEAVY SPARK and NO MORE at each try. Only hit's again after
> ignition is turned off and then back on. Please respond with any
> suggestion.
Does the starter turn the engine, or does it only crank a little, then
stop turning ??
Keep in mind any newer vehicle from about 1985 on up, has an ON BOARD
spark/fuel computer, with a variety of sensors- and the only way to
effectively check them all, is with a special diagnostic computer-
which the dealer has- or the better repair garages have. You have to
"scan" the entire system first, to be sure all the sensors are working
properly. Then also do a fuel pump pressure and volume test, and a fuel
pump relay check- (all new cars are fuel injected- so they use an
electric fuel pump usually) Once you eliminate the computer controls
and sensors, THEN you can move on to the basic engine diagnosis.
95% of the time, it's in the computer controls and fuel system. Most
of the time, the problem is electrical or sensors.
Finally, every car should be checked for EXHAUST BACKPRESSURE, by
removing the O2 sensor, and running the car with a pressure tester
screwed into the O2 tap. Many converters come up PLUGGED. My 2002 GM
car with 75,000 miles on it, already had a plugged converter.
Drive with a plugged converter long enough, you burn all the heads off
the exhaust valves- due to excessive engine heat- the exhaust cant' get
out.
just a word to the wise.
my advice, take the car to a shop with diagnostic computer, the days of
the home grown fixer is over for these new cars. The only thing the
average guy can do, is brakes, change oil, trans fluid, filters. When
it comes to a "no run" problem, forgettaboutit...
>> Stay informed about: 96 3.3 Dodge just stopped. Cam & crank sensors changed w/A..