12-28-2017 | #1 |
Join Date: Jun 2013
Location: Warminster, PA
Posts: 78
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Fuel pressure test port cap
Hello,
Does anyone have the part number for just the cap that goes on the fuel rail where you test fuel pressure? Thanks, Bill
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LT5 Red/Red |
12-28-2017 | #2 |
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
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Re: Fuel pressure test port cap
FYI - I think an -4AN cap will screw on there.
Mine dropped down into the valley a couple of years ago. I think I had a blue anodized cap on there for a while, and later put a fuel pressure sensor there. Last edited by RussMcB; 12-29-2017 at 10:26 PM. |
12-28-2017 | #3 |
Join Date: Jun 2013
Location: Warminster, PA
Posts: 78
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Re: Fuel pressure test port cap
Good information, thanks for your help!
Bill
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LT5 Red/Red |
12-28-2017 | #4 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Fuel pressure test port cap
When I went through that search a few months ago, until a kind soul gave me one, several suggested going to a local HVAC shop - it being an AN fitting.
Good hunting!!
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
12-29-2017 | #5 |
Join Date: Oct 2004
Posts: 1,890
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Re: Fuel pressure test port cap
If you're near an ACD jobber or GM dealer you might try 214-1044 or 25532662. I've never tried this but I don't know why not. With whatever you buy be sure to check inside the cap for the o-ring seal. I think that generic -4AN caps may not have the seal.
If you try the GM I'd be interested if you post back and mention your thoughts. I've always intended to but haven't had the need so I never have. |
12-29-2017 | #6 |
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
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Re: Fuel pressure test port cap
Feel free to correct me if I'm wrong, but that seal probably isn't super important. The cap is mainly to keep out water/dust, right? It's not holding fuel pressure in the rail. My hunch is, the AN cap wouldn't let anything in as long as it's on tight enough not to back off due to vibration.
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12-29-2017 | #7 |
Join Date: Jun 2013
Location: Warminster, PA
Posts: 78
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Re: Fuel pressure test port cap
Thanks again for the information. I ended up at Lowes and bought part number 40-4X P. For $2.00, I have a cap that will work although it isn't NCRS!
Thanks again, Bill
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LT5 Red/Red |
12-29-2017 | #8 |
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
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Re: Fuel pressure test port cap
Ah, 7/16-20 straight thread, 4AN.
Thanks for sharing. |
12-30-2017 | #9 |
Join Date: Jul 2010
Location: Woodstock, Ontario, Canada
Posts: 1,275
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Re: Fuel pressure test port cap
Theres another thread about this exact topic.
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peace Paul ZR-1 Net Registry Member #1494 |
01-01-2018 | #10 |
Join Date: May 2007
Location: Addison IL
Posts: 243
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Re: Fuel pressure test port cap
GM did not issue a part number for the metal silver cap used on the LT5. The cap was available in a service kit that included a new valve. The kit is PN 17112219 discontinued by GM.
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