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Will not start when cold

Tiny
HENDERSONCOREY89
  • MEMBER
  • 1997 CHEVROLET SILVERADO
  • 190,000 MILES
This has been an issue for me for quite some time but anyways I have 2 DTC's a P01345 and a P01345 P/d (pending) the truck will not fire when it is cold and what I have been doing to remedy this is plug in the frost plug for about an hour and it will start right up but as soon as it sits overnight same thing I have done some research and people say it may be the distributor I have changed cap rotor plugs wires. And I have taken the distributor out 1 time to fix the mounting tabs for the cap which there is only one holding it down right now. But I put it back in exactly the way it came out with no codes at the time. Any suggestions
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Monday, March 12th, 2012 AT 9:32 PM

9 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the coolant temperature sensor and the fuel pressure-also refer to this link:https://www.2carpros.com/articles/car-cranks-but-wont-start
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
HENDERSONCOREY89
  • MEMBER
  • 8 POSTS
Alright well I unplugged the frost plug and let it sit for most of the day then when I got home I replaced the engine coolant temp sensor(Also checked wiring and fuel filter and she started right up after the filter and lines were primed. But let it sit overnight without plugging it in went to start it this morning and it took a few times turning the key on and off before she would fire up! I only have one hold down bolt on my distributor (the other one the mounting tab snapped)can this cause this code to be set and extensive cranking time? Or am I dealing with a fuel issue still?
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure with a gauge if its within specs and also the IACV
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
HENDERSONCOREY89
  • MEMBER
  • 8 POSTS
Finally got my hands on a fuel pressure gauge I think I may have some problems 59 psi when I turn the key but gradually drops not very quickly but over a period of 20 mins or so its down to like 20 psi. Running it at a idle its sitting at 50 psi not sure if its a failing regulator or injecter sticking open? What is something to look for? Vacuum leaks I dont hear any and it dont idle like it has any.
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Is it a TBI, CSI or SFI fuel injection system-If its not a TBI that fuel pressure 50psi is too low-injector/regulator could be leaking
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
HENDERSONCOREY89
  • MEMBER
  • 8 POSTS
It is a SFI fuel injection set up I started looking further into it and removed the vacuum line from the plenum to the brake booster and it is soaked in there so im betting dollars to donuts its the regulator but I could be wrong isnt it supposed to be dry in there?
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
There's nothing suppose to be there oil/gas vacuum goes thru there to operate the brake booster
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
HENDERSONCOREY89
  • MEMBER
  • 8 POSTS
Well it is soaked in there I dipped my finger in and it came out black and smelled like gas to me. So my question is what are you saying that there would be no way for oil/gas to get that far back on the intake or what or are you saying its something leaking i.E regulator/injector?
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Wednesday, September 2nd, 2020 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Your fuel pressure is too low, should be 56-62psi for SFI- Check the injectors and fuel pressure regulator if its leaking
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Wednesday, September 2nd, 2020 AT 5:56 PM

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