Bypassing A/C compressor

Tiny
LISAMASON
  • MEMBER
  • 2001 FORD TAURUS
  • 3.0L
  • V6
  • AUTOMATIC
  • 158,000 MILES
Just put a bypass pulley on my car hooked everything back up and now car wont start. I noticed my coolant reservoir had a crack in it and was leaking. Would that stop it from starting?
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Thursday, October 6th, 2016 AT 4:01 PM

7 Replies

Tiny
WRENCHTECH
  • EXPERT
Are you sure you plugged the crank sensor back in? I think it may be behind the compressor in that one.
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Thursday, October 6th, 2016 AT 5:22 PM
Tiny
LISAMASON
  • MEMBER
I took the compressor out and replaced it with a bypass pulley.
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Friday, October 7th, 2016 AT 1:40 AM
Tiny
WRENCHTECH
  • EXPERT
I am aware of that.
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Friday, October 7th, 2016 AT 5:10 AM
Tiny
LISAMASON
  • MEMBER
Oh sorry, I will check to see if the sensor is plugged in. Thank you.
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Friday, October 7th, 2016 AT 8:19 AM
Tiny
KEN
  • ADMIN
Please let us know what you find so it will help others.

Best, Ken
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Monday, October 10th, 2016 AT 10:05 PM
Tiny
LISAMASON
  • MEMBER
Sensor was plugged in so it may be bad.I'm gonna buy a new one and try that.
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Tuesday, October 11th, 2016 AT 6:49 AM
Tiny
WRENCHTECH
  • EXPERT
Throwing parts at it can be a very expensive way of diagnosing. You really need to do some testing before buying any parts.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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Tuesday, October 11th, 2016 AT 7:31 AM

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