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killianauto
New User
Dec 9, 2010, 5:14 PM
Post #1 of 6
(1477 views)
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2000
lincoln
ls
3.9l v8
124000
I have a lincoln ls that will not start. I have a scan tool and get no codes. It wants to start when the gas pedal is pushed half way down but nothing. I have checked the fuel pressure and its fine. no check no check engine light and the the light in the dash does nothing. i have gone through averything i can find and still get nothing when it truns over. Anyone got any suggestions on what is going on with it?
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 9, 2010, 5:22 PM
Post #2 of 6
(1472 views)
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Here's how you find the problem
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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killianauto
New User
Dec 20, 2010, 2:03 PM
Post #3 of 6
(1434 views)
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i have checked all that you said. checked compression and checked for spark and it got both. i pull the plugs out and they are wet with gas. checked for spark on all plugs and checked to see if the coil packs are working and they are all working. got good fuel pressure got good compression and spark but will not run. there has to be something im missing
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 20, 2010, 2:13 PM
Post #4 of 6
(1427 views)
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That simply cannot be true, assuming that is actually fuel and not water. If you had a good spark and compression, you would be getting fire, even if it was out of ignition timing, it would at least backfire. If your plugs are getting wet, then you either have insufficient spark, bad fuel or bad compression. It is possible to be flooding from a bad CTS or something like that but even that would start when it was cold.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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Jeff Norfolk
Enthusiast
Dec 20, 2010, 2:15 PM
Post #5 of 6
(1424 views)
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Post your reading (fuel pressure, compression) and lets go from there.
Jeff
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Sidom
Veteran
/ Moderator
Dec 20, 2010, 8:41 PM
Post #6 of 6
(1417 views)
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Post all the results from all the tests. Numbers, not "good"
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