Very Strange "Car won't start sometimes" problem





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I never depress the pedal by the way of all my 5 years having this car to turn it on.
(Automatic btw)
I hit a pot hole few weeks ago on my passenger side, is it possible this could've caused some wires or fuses to be bumped out of place on the passenger side?
Figured I'd post here to share my experience if it may help anyone or shed light on this issue.
I heard it could also be key fob related by the way? My keb fob battery has been very weak the past few weeks and I only got around to replacing it the other day. But this morning by pure coincidence I used my spare key #2 fob (almost brand new never used before) and the car started.
Must add: the DIC sometimes reads "charge system fault" when i try to start the car and fail
Last edited by dragunov47; Oct 18, 2021 at 05:59 PM.
I never depress the pedal by the way of all my 5 years having this car to turn it on.
(Automatic btw)
I hit a pot hole few weeks ago on my passenger side, is it possible this could've caused some wires or fuses to be bumped out of place on the passenger side?
Figured I'd post here to share my experience if it may help anyone or shed light on this issue.
I heard also it could also be the key fob related by the way? My keb fob battery died, I replaced it. But this morning by pure coincidence I used my spare key #2 fob (almost brand new never used before) and the car started.
Must add: the DIC sometimes reads "charge system fault"
BEST to start a new thread because you’ll have more views with this thread being at the top instead of getting lost at the bottom !!





You will need to get a fuel pressure gage and see if the fuel system bleeds down shortly after engine shut down.
Try this: Cycle the ignition key to the RUN and then OFF position several times and then see if the engine cranks and runs on the FIRST crank. If it does, your answer is, you have a fuel pressure/check valve issue.
NOTE: That part is NO LONGER available as a GM OEM Replacement Part.
Give that a try and let us know what you find out.
NOTE: Some AUTO PARTS stores will rent you a fuel pressure tester for FREE. The Schrader fitting that you need to connect the pressure gage to is on the front of the drivers side fuel rail and is easy to access.
Bill
You will need to get a fuel pressure gage and see if the fuel system bleeds down shortly after engine shut down.
Try this: Cycle the ignition key to the RUN and then OFF position several times and then see if the engine cranks and runs on the FIRST crank. If it does, your answer is, you have a fuel pressure/check valve issue.
NOTE: That part is NO LONGER available as a GM OEM Replacement Part.
Give that a try and let us know what you find out.
NOTE: Some AUTO PARTS stores will rent you a fuel pressure tester for FREE. The Schrader fitting that you need to connect the pressure gage to is on the front of the drivers side fuel rail and is easy to access.
Bill
So I got stranded today at the grocery store, car was now making a different new noise I haven't heard past few days. Like a cough sound. I tried to jump it, failed, but a friend came along to jump it with a more powerful jumper pack. We took it to a local shop and got installed a new battery (Interstate) and it seems to be running as good as new... hopefully I don't jinx it. Could it have been a simple battery issue all this time?
The battery that was inside it all this time was installed back in early 2018. And it has died on me few times during cold winter garage storage. I've had to jump it and charge it a handful of situations these past 3.5 years. It must have been on its last dying leg. And it was a cheap battery from advance auto zone..
Does this make sense? It was the battery the whole time? Local garage shop tested the starter and alternator and found nothing wrong. So they just ended up putting the new battery in.
When I was standed, I called chevy roadside assitance for a tow they would've towed me to the closest dealer, but all the dealers were booked. They wouldnt see the car till NOVEMBER. Some third party tows wanted $300 for a few towns over. The chevy program tow was about $115 to the dealer. Good thing my friend was able to come with his jump pack.
The Best of Corvette for Corvette Enthusiasts
Browsing a bunch of other threads i've compiled a short list of possible items that could be causing all this?
Check carefully the cable that ties to the starter solenoid and connects the alternator and battery red wire all together.
You were right - one new starter and a new shielded cable to the tune of about $600 later
loose connection at the starter? Loose starter cable?
burnt contacts in the ignition switch?
loose battery terminal wire?
fixed it by chasing the wires to the starter where we found the header had melted the end of a connector
fuel pressure related issue mentioned by Bill?
After getting the header off on the passenger side, I noticed the starter nut ad well as the ground bolt to the block were both loose. After tightening them the car runs fine. Apparently the battery runs through the starter to the alternator, hence the domino effect. Thanks for all the help though.
Last edited by dragunov47; Oct 20, 2021 at 06:26 PM.
Last edited by C5 Diag; Oct 20, 2021 at 06:39 PM.
small update: thanks to the wealth of information on these forums, i saw a key tip to turn the key and leave it in the "ON" position for a few seconds, my whole instrument panel cluster flickers like crazy and eventually stops flickering, and then i turn the key to the last position 'start' and the car starts up no problem and I was able to get home. So i think as c5 diag says, the problem could be the ignition switch and/or alternator/positive battery cable at the starter solenoid.
Will visit the shop tomorrow to look into further. Hoping its a common easy fix.
edit- i also heard about some people having 'heavy' key rings/chains/lanyards and this possibly messing up the ignition switch due to the weight? i have about 7 keys on mine, with one light key ring decoration i recently added... I dont think it is heavy at all... but who knows...










