 fuel pressure, builds but drops |
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| Gunn1 |
 Nov 18 2016, 11:08 PM
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#1
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Senior Member  Group: Members Posts: 1,021 Joined: 14-February 16 From: Minnesota Member No.: 19,670 Region Association: None  |
After the car sat for a few months (74 2.0 liter factory EFI) the fuel system builds pressure as it should when the key is turned to the on position, but once the system is up to pressure (about 40PSI on the gauge) the pump shuts off as it should but the pressure drops on the gauge. Car will start but barely. Used to build pressure then the pump would shut off but gauge would stay/hold pressure at right around 40PSI until car was started. Do I have a leak somewhere. there is no evidence or gas smell.
what could it be? Up until now the car always started and ran great. |
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| tomh |
Nov 28 2016, 01:58 PM
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#2
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Member Group: Members Posts: 322 Joined: 28-February 10 From: san jose Member No.: 11,412 Region Association: None |
Quick question here, in the warm climates would it be ok to just compleatly disconnect the csv.
What would be the drawbacks on doing that. |
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| jd74914 |
Nov 28 2016, 07:01 PM
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#3
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Its alive Group: Members Posts: 4,843 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
QUOTE(tomh @ Nov 28 2016, 02:58 PM)  Quick question here, in the warm climates would it be ok to just compleatly disconnect the csv. What would be the drawbacks on doing that. Yes, you do not need a cold start valve to start, but it does make starting easier. Without that large start pulse you'll likely be cranking a bit longer. |
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| Gunn1 |
Nov 28 2016, 07:22 PM
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#4
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Senior Member Group: Members Posts: 1,021 Joined: 14-February 16 From: Minnesota Member No.: 19,670 Region Association: None |
QUOTE(jd74914 @ Nov 28 2016, 07:01 PM) QUOTE(tomh @ Nov 28 2016, 02:58 PM) Quick question here, in the warm climates would it be ok to just compleatly disconnect the csv. What would be the drawbacks on doing that. Yes, you do not need a cold start valve to start, but it does make starting easier. Without that large start pulse you'll likely be cranking a bit longer. My 74' has the cold start valve but it is not wired, or connected to the fuel supply. the car actually starts pretty good without it, but you have to treadle the throttle a little to keep it going . Question (IMG:style_emoticons/default/confused24.gif) Besides helping start a cold engine does the Cold start valve also act like a idle enrichment circuit and help regulate fuel delivery to create a more stable idle. |
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Posts in this topic
Gunn1 fuel pressure Nov 18 2016, 11:08 PM
Rand :ttiwwp:
:stromberg:
:stromberg:
:stromberg:
... Nov 18 2016, 11:58 PM The Cabinetmaker Admin! Clean up in the garage please. Nov 19 2016, 01:00 AM Gunn1 if you don't have a answer that's ok. I ca... Nov 19 2016, 08:26 AM pbanders
After the car sat for a few months (74 2.0 liter ... Nov 19 2016, 02:13 PM
Gunn1
After the car sat for a few months (74 2.0 liter... Nov 19 2016, 02:25 PM Bartlett 914
[quote name='pbanders' post='2424883' date='Nov 1... Nov 19 2016, 02:35 PM pbanders
Cold start valve. It is the 5th injector
It... Nov 19 2016, 02:56 PM Gunn1 Thanks going to go out and give the suggestions a ... Nov 19 2016, 03:24 PM Gunn1 plenum is dry, no leaks at the injectors, going to... Nov 20 2016, 05:19 PM Gunn1 Got it running, after looking over everything I no... Nov 26 2016, 06:44 PM Rand Dude, I wish you would give it a rest. Find anothe... Nov 27 2016, 05:57 PM porschetub
Dude, I wish you would give it a rest. Find anoth... Nov 27 2016, 08:27 PM The Cabinetmaker By now everyone should know who he is. The questio... Nov 28 2016, 07:40 AM boxsterfan Who is he/she? I guess I don't spend enough t... Nov 28 2016, 02:20 PM The Cabinetmaker
Who is he/she? I guess I don't spend enough ... Nov 28 2016, 02:48 PM Gunn1 The info in the post is ledgit. Explained exactly ... Nov 28 2016, 05:28 PM Rand
The info in the post is ledgit. Explained exactly... Nov 28 2016, 08:00 PM second wind I am not banned....and for what? Just who the hel... Nov 28 2016, 10:48 PM The Cabinetmaker Once a troll, well you know the rest. Nov 29 2016, 07:18 AM Gunn1 I have no affiliation with "Second Wind" Nov 29 2016, 09:15 AM The Cabinetmaker So you do admit having multiple user names! Yo... Nov 29 2016, 09:23 AM Gunn1
So you do admit having multiple user names! Y... Nov 29 2016, 12:31 PM tomh I was just starting to learn something here about ... Nov 29 2016, 03:55 PM |
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