 Fuel pump help, Please |
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| gster |
 May 19 2018, 02:55 PM
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#1
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Newbie  Group: Members Posts: 11 Joined: 15-April 17 From: canada Member No.: 21,021 Region Association: Canada  |
I've installed an Airtex pump on the car as recommended by many.
The car does run but terribly.... I hope I've installed correctly and put the "T" adapter in the right place.  The fuel line from the tank goes to the filter then to the pump. The pump output line is then T-eed to the other 2 lines....  Have I got this wrong? Is the filter restricting flow? The car has been sitting awhile and I've put fresh gas in. Otherwise nothing has changed. Any help is appreciated. |
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| jcd914 |
May 19 2018, 08:14 PM
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#2
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
The Fuel pressure regulator in the engine compartment dumps fuel to the fuel return line back to the tank. The 3 port fuel pump also has a pressure relief valve that can dump fuel to the return line to the tank. The return line from the fuel pressure regulator and the pressure relief valve on the pump are "T"d together near the pump.
If you replace the 3 port pump with a 2 port pump you eliminate the "T" fitting and the old line from the pump to the "T". The return line from the pressure regulator goes straight to the fuel tank. You should also be sure you are using fuel line rated for Fuel Inject pressure and the ethanol our gas has these days, J30R9 rating I believe. I have not seen any cloth braided fuel line that is rated for I pressure. Jim |
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| gster |
May 20 2018, 07:18 AM
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#3
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Newbie Group: Members Posts: 11 Joined: 15-April 17 From: canada Member No.: 21,021 Region Association: Canada |
QUOTE(jcd914 @ May 19 2018, 08:14 PM)  The Fuel pressure regulator in the engine compartment dumps fuel to the fuel return line back to the tank. The 3 port fuel pump also has a pressure relief valve that can dump fuel to the return line to the tank. The return line from the fuel pressure regulator and the pressure relief valve on the pump are "T"d together near the pump. If you replace the 3 port pump with a 2 port pump you eliminate the "T" fitting and the old line from the pump to the "T". The return line from the pressure regulator goes straight to the fuel tank. You should also be sure you are using fuel line rated for Fuel Inject pressure and the ethanol our gas has these days, J30R9 rating I believe. I have not seen any cloth braided fuel line that is rated for I pressure. Jim Thanks to all for the advice. I thought about it last night ... I've re routed the fuel return line (from engine) back to the pump input ahead of the filter. Seems to run good and no leaks! Took it out for some fresh gas and air in the tires and all seems good.  |
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| SirAndy |
May 20 2018, 11:26 AM
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#4
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Resident German Group: Admin Posts: 41,634 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(gster @ May 20 2018, 06:18 AM) I've re routed the fuel return line (from engine) back to the pump input ahead of the filter. No! Do you still have fuel injection or do you have carbs? If you still have FI and you switched to a 2-port pump, the return line will go from your pressure regulator (the last part in the fuel system on your engine) straight back to the second nipple on the tank. That way the system can bleed off excess pressure and pump the not needed fuel back into the tank. Again, if this is still FI, you are also using the wrong hose and hose clamps, the whole system after the pump is under a lot of pressure and using the wrong components is a good way to burn your car to the ground. (IMG:style_emoticons/default/shades.gif) |
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Posts in this topic
gster Fuel pump help, Please May 19 2018, 02:55 PM
ClayPerrine There should NOT be a T fitting when using the air... May 19 2018, 03:02 PM
gster
There should NOT be a T fitting when using the ai... May 19 2018, 03:22 PM ClayPerrine
[quote name='ClayPerrine' post='2610862' date='Ma... May 19 2018, 03:27 PM gster
[quote name='ClayPerrine' post='2610862' date='M... May 19 2018, 04:08 PM ndfrigi
[quote name='ClayPerrine' post='2610875' date='Ma... May 19 2018, 06:41 PM ClayPerrine Where does the other end of the orphaned line go? May 19 2018, 06:21 PM gster
Where does the other end of the orphaned line go?... May 19 2018, 07:44 PM ndfrigi i also suggest to add fuel pressure gauge or borro... May 19 2018, 06:29 PM Mark Henry I can't remember what the 3rd line does, but I... May 19 2018, 08:00 PM Mark Henry
You should also be sure you are using fuel line ... May 20 2018, 05:30 AM Mark Henry
[quote name='gster' post='2611060' date='May 20 2... May 20 2018, 11:40 AM Mark Henry I look at this pic and say get rid of the braided ... May 20 2018, 11:00 AM The Cabinetmaker I second dumping the braided hose. Bad news. Not e... May 20 2018, 11:23 AM brownaar I switched to the two-port pump several months ago... May 20 2018, 11:40 AM Dave_Darling Let's summarize things a little bit here.
- T... May 20 2018, 12:25 PM gster
Let's summarize things a little bit here.
- ... May 20 2018, 03:07 PM ndfrigi
Let's summarize things a little bit here.
-... May 20 2018, 04:13 PM rhodyguy After the FP reg the fuel SHOULD flow unrestricted... May 20 2018, 04:12 PM The Cabinetmaker Why do you need to "find the T" when you... May 20 2018, 04:36 PM porschetub Surprised it ran @ all with that contra flow ,I ag... May 20 2018, 05:02 PM |
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