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C5 No Start/Crank in Cold morning, Warmer Afternoon Cranks NP, Please Help <<


New member
Jun 19, 2013
2001 2002 Z06 Black turbo
Good Morning,

I have an on going problem with an Automatic C5 2000 Corvette. :poop: Every Cold morning around 45-50 degrees šŸ„¶. I am having problems trying to
start this car. There is No sound, No crank. No security light Alert on. all dash lights working and visible when turning on. Dead Silence no crank. :eek:

During the afternoon when I get back from work, its warmer :coffee: weather and the corvette starts up with no problem never failing. Since the car was
recently purchased and by the looks of it was not properly maintained correctly.

I will list what I have done to rectify the multiple failures and problems, replaced parts.

- All new Rotors (Willwood slotted)
- All new brakes , included bad installed emergency brakes
- Oil Change Royal Purple.. flushed with 3 quarts synthetic oil after old , then added new oil Royal
- Bleed the Dark bad Brake fluids , Cleaned all the lines
- All 2 Serpentines replaced
- AC Pulley Tensioner replaced
- Upper Tensioner Replaced
- Repaired the Notorious ABS module Failure. Traction control Repaired!
- Replaced all Coolant lines except the lower one
- Replaced the Coolant Thermostat and housing
- Replaced the complete coolant reservoir , old leaking..
- Flushed complete old coolant with lots distilled water
- Removed the VATS from the Ignition that was intermittent faulty
Direct connection made with proper resistance on BMC for VATS, No Security problem
- Installed the LMC5 perfectly, I have done many
- Replaced the MAF sensor, Original was extremely nasty, could not clean it enough with MAF cleaner
- Replaced the intake Temperature sensor
- Replaced the broken outside front Ambient Sensor
- Repaired the front Speed sensor left side
- New 800 CCA Battery

Work in progress To be done
:: Both Valve covers replacements.. Leaking oil on the headers ( Oil Smell Burning) Annoying
:: Both front bearings replacement, both side are ticking rough, not so good
:: Rack pinion replacement
:: Replace the ignition Module.. It's old might as well..

I did not disable in the PCM the VATS. I know it notoriously plagued with problems.
VIN was verified in PCM that matches with car using PCHAMMER.

I know , If the Battery is low it wont allow you run the car, shuts off. Bad battery symptom

I cleared all the errors in the ODB, The only one that comes back is the MAF P0102. MAF has been replaced, installed correctly and error still shows after a while running.
P0102- MASS AIR FLOW (MAF) SENSOR Circuit Low Frequency
Possible ground problem??

I owned six C5 corvettes never had so many problems in one car.

Is the VATS in the PCM Disabling the START relays having some type of phantom issue when its COLD outside?

IS it the MAF Malfunction, and the VATS disabling the starter?

It's very difficult locating problem, Any experienced Help would be greatly appreciated.

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