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stuck in orlando
New User
Aug 24, 2011, 12:51 PM
Post #1 of 4
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engine code 325 335
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i have a 2000 nissan xterra 6 cyl wheel drive.....i have replaced the crankshaft sensor and the knock sensor when engine gets hot it shuts down and wont start battery and starter ar good
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 24, 2011, 1:05 PM
Post #2 of 4
(6761 views)
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Re: engine code 325 335
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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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stuck in orlando
New User
Aug 24, 2011, 2:25 PM
Post #3 of 4
(6751 views)
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Re: engine code 325 335
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when engine in cold it starts and runs smooth has plenty of power for about a mile till the engine gets hot
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 25, 2011, 10:26 AM
Post #4 of 4
(6724 views)
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Re: engine code 325 335
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The knock sensor won't shut the engine down, but the crank sensor will.
You have an oscilloscope to view the crank sensor waveform? If you don't or don't have access to one, your going to have a hard time figuring out what is going on unless you somehow get lucky playing swaptronics.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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