Engine: no start

Expert mechanics, what is the primary reason why a honda motor will
crank and crank all day, but never start? Voltage is getting through
the starting system, but evidently not getting to the plugs to fire
the motor.

Diagnosis #1: small tiny inexpensive sensor causing the main module
to fail to operate properly?

Diagnosis #2: very expensive problem to repair; most likely due to a
combination of sensor and module failure.

Diagnosis #3: most improbable....a fuse is blown somewhere in the
circuit. $1.00
fix.

 

It would help to know the year and model of your car.

In general, it could be lack of fuel or lack of spark. You mention
"evidently not getting to the plugs to fire the motor". Have you
verified that you do not have spark? On some Hondas the ignition control
module ("igniter") is known to fail as it gets older. That would cause
lack of spark.

 

im not an expert mechanic, but im having the same issue with my 87 CRX but i
know whats wrong. things to try:

check to see if youre getting fuel
check your spark plugs
check your plug wires
in my CRX, i have a primary and aux. fuel filter. replace both if you hve 2,
or just replace the primary if thats all you have.
check your rotor and distributor cap
in my CRX, there is a fuel line going from the bottom to the car to the aux
filter, then to the carb (oh yeah my car is carborated). replace both these
hoses if you have them.


thats what ive done in my CRX, but im still not getting it to turn over and
stay on. im pretty sure i got it licked though, as the car was getting
flooded. there was a bunch of old fluid in there so im sure i just need to
burn the old fluid out and get new fluid in there. if anyone else has
suggestions for me, hit me up at the email in my sig file. thanks and good
luck!


-agent smith

 

===================
Turn the key to the 'run' position (II), listen for the fuel pump to run
for two seconds. If you don't hear it, smack the dash with your fist and
see if you hear it run. If so, resolder or replace you MAIN RELAY. It
will probably run ONCE after each thumping.

This is assuming we're talking about a Honda CAR that has fuel injection.

'Curly'

 

Which car and model year is this? Are you sure it's lack of spark at the
plugs, vs. a fuel problem?

Common problems are 1) main relay has bad solder joints which prevents fuel
pump from running; 2) igniter (in distributor) or coil is bad; 3) bad
contact in ignition switch. Beyond that it gets more exotic.

Rgds, George Macdonald

"Just because they're paranoid doesn't mean you're not psychotic" - Who, me??