C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1 second delay

Old Aug 9, 2014 | 09:15 PM
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Default 1 second delay

I've worked on a lot of cars but never seen a delay in cranking like my Corvette. What is the reason my '93 has a 1 second delay before the engine cranks after the ignition key is turned to start? Is there is some sort of electrical signal check?

Help me solve this mystery and I can sleep better at night knowing the facts. lol Thanks in advance.
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Old Aug 10, 2014 | 12:38 PM
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Nobody knows the answer to this mystery?
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Old Aug 10, 2014 | 02:38 PM
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Test the small wire on the starter with a test light. Does it light up right as you go into the start position?
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Old Aug 10, 2014 | 05:45 PM
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Do the dash gauges respong immediately or does their response also have the 1sec delay?
If both delayed, look to the ign sw, else investigate the starter circuit as suggested above.
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Old Aug 11, 2014 | 05:06 PM
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Originally Posted by 65Z01
Do the dash gauges respong immediately or does their response also have the 1sec delay?
If both delayed, look to the ign sw, else investigate the starter circuit as suggested above.
Gauges light up immediately. What exactly am I testing for at the starter? I have a 1 second delay each and everytime. There has never been an issue with the engine not starting or the starter not cranking.
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Old Aug 11, 2014 | 05:12 PM
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Originally Posted by ex-x-fire
Test the small wire on the starter with a test light. Does it light up right as you go into the start position?
I won't have a chance until this weekend to get under the car for the test. I will need to peek out of the windshield to see if the test light turns on exactly at the same time I turn the ignition switch.

If the small starter wire does NOT immediately energize and has a 1 second delay then what should I be looking for? If it DOES light immediately, then what? The amount of delay is the same each and everytime, and the engine never has a problem turning over and starting.

What exactly is this test trying to determine?

Thanks
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Old Aug 12, 2014 | 01:35 AM
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Might be VATS having a hiccup. It turns on the starter enable relay that applies the power to the starter solenoid.
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Old Aug 12, 2014 | 11:01 AM
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When mine did that (1990) it was the starter solenoid. I removed it, cleaned it out and cleaned the contacts and it's been fine ever since.
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Old Aug 13, 2014 | 07:37 PM
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Originally Posted by tbirdsps
When mine did that (1990) it was the starter solenoid. I removed it, cleaned it out and cleaned the contacts and it's been fine ever since.
So it went from 1 second delay to zero delay? I gotta make sure before I pull out the starter to clean the solenoid.
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Old Aug 14, 2014 | 12:45 AM
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A delay when starting is usually electrical resistance from a bad starter, starter solenoid or battery cable.

Electrical resistance builds and heats the starter cable as electricity tries to make its way to the starter. Crank the engine over a few times and feel the positive battery cable. If the cable insulation feels warm or hot, it's most likely the starter or starter solenoid is shorting out and will need to be replaced soon.
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Old Aug 14, 2014 | 02:18 PM
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Originally Posted by Ozzstar
I've worked on a lot of cars but never seen a delay in cranking like my Corvette. What is the reason my '93 has a 1 second delay before the engine cranks after the ignition key is turned to start? Is there is some sort of electrical signal check?

Help me solve this mystery and I can sleep better at night knowing the facts. lol Thanks in advance.
Does this problem happen when the engine is cold and hot, or does it vary by temperature?

I have seen grease on a starter motor drive shaft slow down the engagement of the bendix and that will delay the engagement of the starter motor until the bendix has pushed through the grease. Once the car is warm the grease does not slow down the bendix and the car starts immediately.
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Old Aug 14, 2014 | 04:59 PM
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Originally Posted by bjankuski
Does this problem happen when the engine is cold and hot, or does it vary by temperature?

I have seen grease on a starter motor drive shaft slow down the engagement of the bendix and that will delay the engagement of the starter motor until the bendix has pushed through the grease. Once the car is warm the grease does not slow down the bendix and the car starts immediately.
Same results regardless of temperature, 1 second delay. Hot, warm or cold
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