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Engine Turns Over but won't Crank
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LDonnie
New User
Aug 10, 2012, 7:06 PM
Post #1 of 4
(4137 views)
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Engine Turns Over but won't Crank
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I have a 2001 Lexus ES300. It has ~89600 miles on it. The car has been running wonderfully since I bought it used in Dec. 2010. Drove it yesterday for about 15 minutes and had no problems.
However, tonight (about 24 hours since I last drove it) the car turns but it will not fire. The noise of the engine sounds normal when it is turning, it just won't crank. Has anyone ever experienced anything like this before?
Do you have any suggestions on what it may be?
It seems like it should be some minor issue since the engine sounds normal. I'm guessing it could be some kind of fuse or switch that has gone bad but I honestly do not know at all.
Thank you so much in advance.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 10, 2012, 7:44 PM
Post #2 of 4
(4104 views)
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Re: Engine Turns Over but won't Crank
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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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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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LDonnie
New User
Aug 13, 2012, 12:24 AM
Post #3 of 4
(4016 views)
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Re: Engine Turns Over but won't Crank
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I was able to figure out what was wrong with it via a family friend.
The Lexus ES300 will sometimes not crank if the security "clicker" inside of the key is not present.
I did not have the guts to my security entry on my key with me because it had fallen out due to the screw going bad.
I used my spare key and it fired up beautifully.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 13, 2012, 3:10 AM
Post #4 of 4
(4008 views)
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Re: Engine Turns Over but won't Crank
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Gee, ya think?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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