Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello and welcome!My name is ***** ***** I can assist you with your question.
I am very sorry your having this issue with your vehicle.
I will try my best to answer all of your questions.
However, before we get started, please let me mention a few things.
1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.
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Can I start by getting your VIN, any stored codes in the computer and the exact fuse that keeps blowing?
Thank you for that information.
Are you aware of everything on this circuit?
Do you have a wiring diagram for this ECM 1 fuse circuit?
Would you like one?
Ok, if the fuse is no longer popping, then I suggest we move on to something else.
So the engine is cranking over but not starting?
So it starts up and then stalls and or runs poorly?
What is the fuel pressure at?
Does it drop down at all when the engine is turned off?
What is the battery voltage at with the engine turned off?
What is the battery voltage at with the engine cranking?
You might just have a bad battery.
It should not drop below 9.6 volts while cranking.
First, it does not matter if the battery is new or not. I have seen bad new batteries right out off the shelf.
Second, if the engine is cranking over just fine, this has nothing to do with the electrical system.
Third, it is most likely going to be a an air/fuel ratio delivery issue.
Charge the battery, then try a few shots of starting fluid into the throttle by. If the engine starts and runs for a few seconds with the starting fluid, then you have a fuel system issue. If it still won't start with the starting fluid, then most likely you have no spark.
The problem with the fuse blowing and the gauge dropping down might or might not be related to the no start or poor engine running but it sounds as though the charging system voltage regulator is sticking and if the pcm is actually used as a voltage regulator than that may also be the reason that fuse is blowing and you may have a faulty pcm. If so that may be the reason for all of these problems. It don't always work but once you get the engine running tap on the pcm with your finger tips and listen if that tapping changes the way the engine runs, the gauge moves or if the fuse blows. If so, there is something loose inside that pcm and it's intermittently causing these problems.