2001 Chevy Venture

2001 Chevy Venture 6 cyl

need to locate the ecm unit on this van. Having a NO SPARK issue. Any other things to check? Fuses seem good and lots of fuel. Check engine lite on
Do you
have the same problem?
Monday, August 23rd, 2010 AT 5:01 PM

1 Reply

The PCM should be the last thing you would be looking at. You need to run a few more tests to isolate where the problem may be.
Here is the normal procedure. You have already done some of it but the rest needs to be done.

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.
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Monday, August 23rd, 2010 AT 5:39 PM

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