92 Honda Accord will not start when temp outside is below 50 - HELP!

My 1992 (manual transmission)Accord will not start when it is below 50
degrees outside; it will turn over but not start and I can hear the fuel
pump start when I turn the key so that is all good...I have just replaced
the Main relay and that isn't the problem, I also replaced the water pump
and timing belt not too long ago and they should be fine...I really need
to find out the problem with my car and I have a strict budget so any
help/advice would be much appreciated!

On a different note, I also had the a/c compressor lock up on me last year
and any advice on that would be great too...but my main concern is the not
starting in the colder weather.

 

My guess would be the ignition switch is going bad.

 

I got some good advice here last week on my 89 Accord that had a hard
time starting in cool weather. I was told to check the resistance of
the water temperature sensor. Maybe you have the same problem?

 

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Refer to the Owner's manual, and try the suggested fixes for COLD
starting, then try the fix for FLOODED engine. It sounds like you might
have a dripping injector . . . Is it worse if it sits all weekend?

'Curly'

 

This would be my guess as well (not the ignition switch, that typically
has different symptoms!)

The so called TW sensor tells the ECU the coolant temp. If it fails and
indicates a warmed up engine, you will have enormous difficulty starting
it. It's a cheap part, and it is pretty likely your problem.

If you need to start the car, or want to verify that this is the
problem, use started fluid in to the intake snorkel while someone cranks
the car (don't touch the gas pedal, just crank normally). Once it
catches, use the accelerator pedal to hold the engine speed at 1800-2000
rpm. It's possible you'll have to restart a few times this way, but
after about 20s of running you will be able to keep it running with the
accelerator pedal. This will rule out the ignition system or an air
blockage etc.

Good luck,
Arthur