Re: Adding a fuel-pressure check port
Matt Macchiarolo wrote:
> Are you certain there is no test port? Maybe they did away with them, > but there is one on my '00 Wrangler with the same engine. It's on the > fuel rail. Yea.. they ditched the check port sometime in 05 I think. -- DougW |
Re: Adding a fuel-pressure check port
On Jun 3, 8:13 pm, "DougW" <post.repl...@invalid.address> wrote:
> stilllearning wrote: > > I do not have any problems; I was thinking of putting in a fuel port > > as a pro-active measure. I would like to study the pressure patterns > > at idle, during winter, while accelerating and such, so that when a > > problem occurs, I am somewhat prepared. The problem could be fuel > > pump, fuel regulator, leaks and such. Moreover, when the car stalls, > > the problem could or could not be fuel pressure related. > > Ok.. this is what your going to see. > > ign on -- idealy a few psi from the last shutdown > followed by a run up to operating psi > start/idle -- basic static pressure > running -- basic static pressure > wide open -- a couple more psi (depends on the year) > shutdown -- a slow but steady build as fuel in the > rail expands due to heat. Followed by > a return to normal and a very slow decrease > > Nothing apart from a very sensitive electronic sensor > and scope could detect injector firing. > > About the only things of interest are > 1) lower fuel pressure on acceleration > - clogged fuel filter > - bad pressure regulator (which for your model is in the pump) > - worn pump > 2) slow decrease in pressure with engine off > - leaking fuel system or injector > > Your probably better off buying a good scantool and learning how > to use it. Most of the stuff is monitored by the compooter these > days. > > -- > -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors > Banks Header - and BEER, in the fridge! Have a Scantool OBD-II scanner (http://www.scantool.net/products/ product_info.php?cPath=8_6&products_id=32) and written some software programs to get all my Jeep parameters logged realtime to my laptop while I am driving - a wealth of information, but incomplete. One of this days, I will post this information here. However, the scanner provides no fuel pressure information. Love the scanner, though. |
Re: Adding a fuel-pressure check port
On Jun 3, 8:13 pm, "DougW" <post.repl...@invalid.address> wrote:
> stilllearning wrote: > > I do not have any problems; I was thinking of putting in a fuel port > > as a pro-active measure. I would like to study the pressure patterns > > at idle, during winter, while accelerating and such, so that when a > > problem occurs, I am somewhat prepared. The problem could be fuel > > pump, fuel regulator, leaks and such. Moreover, when the car stalls, > > the problem could or could not be fuel pressure related. > > Ok.. this is what your going to see. > > ign on -- idealy a few psi from the last shutdown > followed by a run up to operating psi > start/idle -- basic static pressure > running -- basic static pressure > wide open -- a couple more psi (depends on the year) > shutdown -- a slow but steady build as fuel in the > rail expands due to heat. Followed by > a return to normal and a very slow decrease > > Nothing apart from a very sensitive electronic sensor > and scope could detect injector firing. > > About the only things of interest are > 1) lower fuel pressure on acceleration > - clogged fuel filter > - bad pressure regulator (which for your model is in the pump) > - worn pump > 2) slow decrease in pressure with engine off > - leaking fuel system or injector > > Your probably better off buying a good scantool and learning how > to use it. Most of the stuff is monitored by the compooter these > days. > > -- > -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors > Banks Header - and BEER, in the fridge! Have a Scantool OBD-II scanner (http://www.scantool.net/products/ product_info.php?cPath=8_6&products_id=32) and written some software programs to get all my Jeep parameters logged realtime to my laptop while I am driving - a wealth of information, but incomplete. One of this days, I will post this information here. However, the scanner provides no fuel pressure information. Love the scanner, though. |
Re: Adding a fuel-pressure check port
On Jun 3, 8:13 pm, "DougW" <post.repl...@invalid.address> wrote:
> stilllearning wrote: > > I do not have any problems; I was thinking of putting in a fuel port > > as a pro-active measure. I would like to study the pressure patterns > > at idle, during winter, while accelerating and such, so that when a > > problem occurs, I am somewhat prepared. The problem could be fuel > > pump, fuel regulator, leaks and such. Moreover, when the car stalls, > > the problem could or could not be fuel pressure related. > > Ok.. this is what your going to see. > > ign on -- idealy a few psi from the last shutdown > followed by a run up to operating psi > start/idle -- basic static pressure > running -- basic static pressure > wide open -- a couple more psi (depends on the year) > shutdown -- a slow but steady build as fuel in the > rail expands due to heat. Followed by > a return to normal and a very slow decrease > > Nothing apart from a very sensitive electronic sensor > and scope could detect injector firing. > > About the only things of interest are > 1) lower fuel pressure on acceleration > - clogged fuel filter > - bad pressure regulator (which for your model is in the pump) > - worn pump > 2) slow decrease in pressure with engine off > - leaking fuel system or injector > > Your probably better off buying a good scantool and learning how > to use it. Most of the stuff is monitored by the compooter these > days. > > -- > -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors > Banks Header - and BEER, in the fridge! Have a Scantool OBD-II scanner (http://www.scantool.net/products/ product_info.php?cPath=8_6&products_id=32) and written some software programs to get all my Jeep parameters logged realtime to my laptop while I am driving - a wealth of information, but incomplete. One of this days, I will post this information here. However, the scanner provides no fuel pressure information. Love the scanner, though. |
Re: Adding a fuel-pressure check port
On Jun 3, 8:13 pm, "DougW" <post.repl...@invalid.address> wrote:
> stilllearning wrote: > > I do not have any problems; I was thinking of putting in a fuel port > > as a pro-active measure. I would like to study the pressure patterns > > at idle, during winter, while accelerating and such, so that when a > > problem occurs, I am somewhat prepared. The problem could be fuel > > pump, fuel regulator, leaks and such. Moreover, when the car stalls, > > the problem could or could not be fuel pressure related. > > Ok.. this is what your going to see. > > ign on -- idealy a few psi from the last shutdown > followed by a run up to operating psi > start/idle -- basic static pressure > running -- basic static pressure > wide open -- a couple more psi (depends on the year) > shutdown -- a slow but steady build as fuel in the > rail expands due to heat. Followed by > a return to normal and a very slow decrease > > Nothing apart from a very sensitive electronic sensor > and scope could detect injector firing. > > About the only things of interest are > 1) lower fuel pressure on acceleration > - clogged fuel filter > - bad pressure regulator (which for your model is in the pump) > - worn pump > 2) slow decrease in pressure with engine off > - leaking fuel system or injector > > Your probably better off buying a good scantool and learning how > to use it. Most of the stuff is monitored by the compooter these > days. > > -- > -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors > Banks Header - and BEER, in the fridge! Have a Scantool OBD-II scanner (http://www.scantool.net/products/ product_info.php?cPath=8_6&products_id=32) and written some software programs to get all my Jeep parameters logged realtime to my laptop while I am driving - a wealth of information, but incomplete. One of this days, I will post this information here. However, the scanner provides no fuel pressure information. Love the scanner, though. |
Re: Adding a fuel-pressure check port
Yeah but the OP said he has an 04.
"DougW" <post.replies@invalid.address> wrote in message news:E6J8i.165126$mJ1.140553@newsfe22.lga... > Matt Macchiarolo wrote: >> Are you certain there is no test port? Maybe they did away with them, >> but there is one on my '00 Wrangler with the same engine. It's on the >> fuel rail. > > Yea.. they ditched the check port sometime in 05 I think. > > -- > DougW > |
Re: Adding a fuel-pressure check port
Yeah but the OP said he has an 04.
"DougW" <post.replies@invalid.address> wrote in message news:E6J8i.165126$mJ1.140553@newsfe22.lga... > Matt Macchiarolo wrote: >> Are you certain there is no test port? Maybe they did away with them, >> but there is one on my '00 Wrangler with the same engine. It's on the >> fuel rail. > > Yea.. they ditched the check port sometime in 05 I think. > > -- > DougW > |
Re: Adding a fuel-pressure check port
Yeah but the OP said he has an 04.
"DougW" <post.replies@invalid.address> wrote in message news:E6J8i.165126$mJ1.140553@newsfe22.lga... > Matt Macchiarolo wrote: >> Are you certain there is no test port? Maybe they did away with them, >> but there is one on my '00 Wrangler with the same engine. It's on the >> fuel rail. > > Yea.. they ditched the check port sometime in 05 I think. > > -- > DougW > |
Re: Adding a fuel-pressure check port
Yeah but the OP said he has an 04.
"DougW" <post.replies@invalid.address> wrote in message news:E6J8i.165126$mJ1.140553@newsfe22.lga... > Matt Macchiarolo wrote: >> Are you certain there is no test port? Maybe they did away with them, >> but there is one on my '00 Wrangler with the same engine. It's on the >> fuel rail. > > Yea.. they ditched the check port sometime in 05 I think. > > -- > DougW > |
Re: Adding a fuel-pressure check port
On Jun 3, 8:19 pm, "Matt Macchiarolo" <m...@nospamplease.com> wrote:
> Yeah but the OP said he has an 04. > > "DougW" <post.repl...@invalid.address> wrote in message > > news:E6J8i.165126$mJ1.140553@newsfe22.lga... > > > > > Matt Macchiarolo wrote: > >> Are you certain there is no test port? Maybe they did away with them, > >> but there is one on my '00 Wrangler with the same engine. It's on the > >> fuel rail. > > > Yea.. they ditched the check port sometime in 05 I think. > > > -- > > DougW- Hide quoted text - > > - Show quoted text - FYI: for a hassle-free installation, you're better off using a crimped connection if you're splicing into a nylon fuel line -- the connectors I've used were specifically tailored to that purpose -- as regular barbs won't cut it. Crimpers vary from the high-dollar, dedicated purpose devices to the [aforementioned] CV-boot variety, depending on the products selected. Try googling "nylon fuel line repair" or something to that effect. Overkill on pieces, CV-style clamping: http://www.etoolcart.com/index.asp?P...OD&ProdID=8126 It might be easier to have a local well-equipped garage crimp it up for you. While working on fitting a supercharger, I found an absolute dearth of information and materials for this exact scenario....even the manufacturers show a cobbled-up pile of fittings in their literature.....the performance aftermarket supplies an an-to-male quick-connect fitting for "Mustang" applications, but their female portion is on the rail or something, so it only gets you halfway there.... |
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