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96 Grand Caravan ES 3.3 Computer Info.
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ansul
User
May 14, 2012, 6:25 AM
Post #1 of 5
(2031 views)
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96 Grand Caravan ES 3.3 Computer Info.
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Caravan will not start getting no fire, mechanic think it's a computer issue...there's some numbers on the old one, going to salvage yard to get another one, what numbers should I be matching up to make sure I get the correct one and people was saying that I may need to get this one programmed for my vechicle....I need help.
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Hammer Time
Ultimate Carjunky
/ Moderator
May 14, 2012, 6:46 AM
Post #2 of 5
(2020 views)
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Re: 96 Grand Caravan ES 3.3 Computer Info.
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You can't simply drop a junkyard computer in there. They are specifically programmed to the original vehicle.
You need to do a whole lot more testing before even considering a new PCM.
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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ansul
User
May 14, 2012, 1:52 PM
Post #3 of 5
(1969 views)
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Re: 96 Grand Caravan ES 3.3 Computer Info.
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Each one of your suggestions has been tried from the camshaft and crankshaft sensor, fuel ingectors, making sure gas injectors work, and timing chain compression which all checked out good. so where do i go from here,
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Hammer Time
Ultimate Carjunky
/ Moderator
May 14, 2012, 2:02 PM
Post #4 of 5
(1964 views)
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Re: 96 Grand Caravan ES 3.3 Computer Info.
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Don't tell me that because if it had passed all those tests, it would be running.
Those weren't suggestions or ideas. That was a systematic series of tests guaranteed to isolate the issue.
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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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Discretesignals
Ultimate Carjunky
/ Moderator
May 15, 2012, 6:03 PM
Post #5 of 5
(1935 views)
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Re: 96 Grand Caravan ES 3.3 Computer Info.
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Instead of getting one out of the salvage yard that may not match up software wise, you could get yours repaired. There are businesses out there that repair ECMs. They also program it with the latest and greatest after they fix the problem.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 15, 2012, 6:04 PM)
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