Weak coils = poor hot engine start?
MECP Certified Installer
Joined: Feb 2009
Posts: 3,176
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From: Mesquite, TX-DFW
If you can bump the key to start (as in just, quickly tap the start position with the key) and then actually try and start the car and it fires right up, you have a fuel pressure issue.
What does bump starting the car do? Does it give it an initial shot of fuel? FYI-I'm running a Haltech Sprint RE.
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MECP Certified Installer
Joined: Feb 2009
Posts: 3,176
Likes: 3
From: Mesquite, TX-DFW
The FC ignition system is very stout and big, the only thing I can think of that may be a problem with it is from what I have read in the past, is Haltech computers hate the stock CAS.
Last edited by jjwalker; Oct 5, 2016 at 09:55 AM. Reason: More info
Also, now that I'm thinking about it, I think I remember having to adjust that map a bit higher for the higher temps in order for easier starting.
--so, a failing fpr will have a hard time pressurizing at higher temps?
MECP Certified Installer
Joined: Feb 2009
Posts: 3,176
Likes: 3
From: Mesquite, TX-DFW
Ok. There's a map called Prime Pulse Time in my Haltech that does something similar. Not sure if it's 3 seconds, but it does prime the system. I'll give that a shot.
Also, now that I'm thinking about it, I think I remember having to adjust that map a bit higher for the higher temps in order for easier starting.
--so, a failing fpr will have a hard time pressurizing at higher temps?
Also, now that I'm thinking about it, I think I remember having to adjust that map a bit higher for the higher temps in order for easier starting.
--so, a failing fpr will have a hard time pressurizing at higher temps?
I had the same problem but could bump the key and fire the car right up. Weirdly enough, my fuel pump upper o-ring failed and was bleeding all the fuel back into the tank.
Ok. There's a map called Prime Pulse Time in my Haltech that does something similar. Not sure if it's 3 seconds, but it does prime the system. I'll give that a shot.
Also, now that I'm thinking about it, I think I remember having to adjust that map a bit higher for the higher temps in order for easier starting.
--so, a failing fpr will have a hard time pressurizing at higher temps?
Also, now that I'm thinking about it, I think I remember having to adjust that map a bit higher for the higher temps in order for easier starting.
--so, a failing fpr will have a hard time pressurizing at higher temps?
On a hot start there should be no vacuum on the hose connected to the FPR (no vacuum situation lasts for close to a minute depending on the model), otherwise there should always be vacuum.
Last edited by satch; Oct 5, 2016 at 12:16 PM.
If you are referring to the pressure regulator control valve it is a separate item from the fpr. The valve is used in hot starts as it adds pressure to the fuel system.
On a hot start there should be no vacuum on the hose connected to the FPR (no vacuum situation lasts for close to a minute depending on the model), otherwise there should always be vacuum.
On a hot start there should be no vacuum on the hose connected to the FPR (no vacuum situation lasts for close to a minute depending on the model), otherwise there should always be vacuum.
Probably not then.
Last edited by satch; Oct 5, 2016 at 01:20 PM.
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