Probably Nothing But....
Thread Starter
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From: southern rural MI
Probably Nothing But....
I have a 2000 C5 convertible that's entirely stock with 56k, manual trans.
I've noticed lately that when starting, that it doesn't fire up immediately like it did a few months ago.
thanks,
RPGR90s
I've noticed lately that when starting, that it doesn't fire up immediately like it did a few months ago.
- Turn key and it sometimes cranks for a bit before it starts.
- No issues with the speed that the starter spins the motor.
- When the problem isn't there, you barely turn the key and it fires immediately.
thanks,
RPGR90s
Team Owner
Joined: Jul 2006
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From: Douglas County WI
Have you tried just turning the key to the on position and letting the fuel pump run for a second or two before turning the key to start? Maybe a loss of fuel pressure while when the car sits for a long time. Couldn't tell you why that could happen though.
Thread Starter
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From: southern rural MI
Thanks,
Thread Starter
Pro
Joined: Dec 2018
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From: southern rural MI
Moderator, Tech Contributor
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From: Cape Coral, Florida
Your '00 numbers should be the same as my '01...fuel pressure should not drop more 5 psi in one minute after the key is turned off and your priming pressure should be between 55-62 psi.
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From: southern rural MI
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From: Cape Coral, Florida
It's best to start that fuel system "diagnostic process" with a KOEO pressure reading...without some specific tooling to actually confirm the filter is clogged I'd change it...IMHO !!...does the fuel pressure drop somewhat when you rev up the engine from idle ??
Last edited by C5 Diag; Sep 10, 2019 at 09:21 AM.
Thread Starter
Pro
Joined: Dec 2018
Posts: 544
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From: southern rural MI
No, fuel pressure is consistent through the RPM range. I have the gauge in my line of sight while sitting in the car, so it was easy to confirm.
Thanks,
RPGR90s
Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
I'd probably want to check fuel pump power and grounds too with the low static fuel pressure...you can do a few things like checking fuel pump current flow (somewhere around 5 amps) and also voltage drop testing on that pump circuit...power and ground !!