 Fuel pressure help, 1st start after rebuild |
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| TonyA |
 Mar 16 2026, 12:23 PM
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#1
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Nachmal  Group: Members Posts: 657 Joined: 17-November 16 From: Hilltown PA Member No.: 20,596 Region Association: North East States 
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Doing the first start on a stock 1974 2.0 FI
I have confirmed spark and some fuel. When i put a little gas down the intake it runs a little. My spray at #2 was weak. I had the pump wired backwards. I fixed that. I put a gauge in line after the fuel rail going to the side port of the regulator. I confirmed getting fuel from the side rail after #1 the hose at the end of the regulator goes to the return across the engine to the side return line. I am getting 42PSI. Is this the correct location for the fuel pressure gauge? Is the plumbing correct fuel rail end at #1 to side port and top end port to the return? With this configuration I tried to lower pressure and I cannot. (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) |
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Replies(1 - 3)
| mgphoto |
Mar 16 2026, 01:07 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,414 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
You should be able to reduce the pressure at the fuel pressure regulator which is at the end of the fuel ring. I think it’s 37 lbs.
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| TonyA |
Mar 16 2026, 01:28 PM
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#3
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Nachmal Group: Members Posts: 657 Joined: 17-November 16 From: Hilltown PA Member No.: 20,596 Region Association: North East States
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Thanks but is the plumbing correctly routed?
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| Ron914 |
Mar 16 2026, 06:39 PM
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#4
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Member Group: Members Posts: 482 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California
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QUOTE(TonyA @ Mar 16 2026, 01:23 PM)  Doing the first start on a stock 1974 2.0 FI I have confirmed spark and some fuel. When i put a little gas down the intake it runs a little. My spray at #2 was weak. I had the pump wired backwards. I fixed that. I put a gauge in line after the fuel rail going to the side port of the regulator. I confirmed getting fuel from the side rail after #1 the hose at the end of the regulator goes to the return across the engine to the side return line. I am getting 42PSI. Is this the correct location for the fuel pressure gauge? Is the plumbing correct fuel rail end at #1 to side port and top end port to the return? With this configuration I tried to lower pressure and I cannot. (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) Hello , My supply comes in on the passenger side and feeds # 3 & 4 Cyl then crosses over to driver side fuel rail and feeds #2 & 1 Cyl then to the port on the side of fuel pressure regulator then out the bottom back to the return to tank . Fuel pressure should be around 29.3 psi . My car is a 76 2.oL D-Jet Fi   |
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