cold start problem--need opinions
Thread Starter
Intermediate
Joined: Feb 2003
Posts: 46
Likes: 0
From: Orlando Fl.
cold start problem--need opinions
I have a 99 FRC with a mn6. Lately I have noticed that the car has been taking longer to fire up when cold. Starts fine when warm. It also turns over freely and I pulled the codes but they are all history codes that appear not related to a starting problem. The car has 32K on it. Would new plugs and wires cure this or am I looking at something else..Thanks in advance for your help....John
Drifting
Joined: Feb 1999
Posts: 1,289
Likes: 11
From: long island NY
Re: cold start problem--need opinions (jzeesc5)
i have a 1997 with 21,500 miles and i have the same problem my car was at the dealer and the vette tech told me to change the fuel filter. i have no codes relating to this problem either. car starts fine when warm but the first start in cranks for a long time. this problem just started to happeing last week. i have changed the plugs last year to tr55.
hope some one can help.
sorry for jumping in on your thread.
mitch
speednut2@aol.com
:banghead:
hope some one can help.
sorry for jumping in on your thread.
mitch
speednut2@aol.com
:banghead:
Drifting
Joined: Feb 1999
Posts: 1,289
Likes: 11
From: long island NY
Re: cold start problem--need opinions (jzeesc5)
i took my car out today for a 1 hour drive stop and let it sit for a 1/2 hour get back in the car and it just cranks than it finaly kicks over.
sombody out there please help.
mitch :banghead: :banghead:
sombody out there please help.
mitch :banghead: :banghead:
Former Vendor
Joined: Apr 2001
Posts: 10,976
Likes: 21
From: FL
St. Jude Donor '13
Re: cold start problem--need opinions (MITCH)
Usually caused by the fuel rail not maintaining fuel pressure :yesnod: You will need to install a pressure gauge and check the fuel pressure when you turn the key on.When you turn the key to the on position,the pump should prime the fuel rail and maintain pressure when you turn the key off.If the pressure drops,fuel is leaking past an injector,or back to the tank (or a leaky fuel line of course)...The fuel pump has an internal check valve to prevent fuel from going back to the tank (2001 and up has the check valve in the fuel line)...A leaky injector would be indicated by rough running and black smoke once it eventually starts...If there is no fuel pressure when turning the key to the on position,a pump relay circuit would be suspect.
The C5 runs off 50psi fuel pressure,so fuel pressure prime when starting is important :yesnod:
http://www.vetteshop.cc/
The C5 runs off 50psi fuel pressure,so fuel pressure prime when starting is important :yesnod:
http://www.vetteshop.cc/
Race Director
Joined: Oct 1999
Posts: 11,514
Likes: 115
From: Arlington TX
Re: cold start problem--need opinions (C-5 TECH)
Mine is starting slow too lately. I suspected as C-5 TECH stated above and started always turning the key to on for a second or two until the fuel pump shuts off then crank. This has not helped mine though it still cranks too long before starting.
Mine has 39k miles now.
Mine has 39k miles now.
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Racer
Joined: Apr 2002
Posts: 265
Likes: 1
From: Derwood MD
St. Jude Donor '06-'09-'10-'11
Re: cold start problem--need opinions (MITCH)
Another item to consider re: cold-start problems is the cold-start injector ( functions sort of the way that the choke does on carboureted cars).
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: cold start problem--need opinions (rgregory)
Mine is starting slow too lately. I suspected as C-5 TECH stated above and started always turning the key to on for a second or two until the fuel pump shuts off then crank. This has not helped mine though it still cranks too long before starting.
Mine has 39k miles now.
Mine has 39k miles now.
