 73 914 2.0 Fuel Pump, Ever hear of this one? |
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| avidfanjpl |
 Apr 23 2010, 03:22 PM
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#1
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914 Hemophiliac  Group: Members Posts: 720 Joined: 6-April 10 From: Bear, Delaware Member No.: 11,566 Region Association: MidAtlantic Region  |
I got the car tuned, but I had some hunting. So, I put a brand new fuel pressure gauge on the passenger side port. The fuel pressure "hunted" between 10 and 30lbs. YEOW!
I went to the clear fuel lines and saw with my own eyes that the fuel was not a steady flow, but was going full to empty on the left clear tube, which goes to the FPG over Cylinder #1. It is really easy to see the tube empty, then fill up again, and coincides with the hunt at about 1000 rpm. Checked the fuel pump in the front trunk and it sounded OK, but am I seeing a failing pump? I checked the new hoses from the pump to tank and pump to engine and back and the tee, and it is all routed correctly. TPS is absolutely set right, and the ECU is on click 11, with a small (1/2 turn) bleed setting on the throttle body screw. WTF? Is this how a fuel pump fails when it isn't a sudden thing? Slowly losing it by varying the actual fuel it can deliver? Or am I missing something obvious? I have 1/4 tank on the gauge, because I filled it myself. Steve Gaglione (my bud from the 70's in NJ and the main reason I am 57 and still messing with 914's) and I have been pulling our hair out on why this car won't take a load, and hunts at idle when points/timing/triggers are all great and set right. It looks like fuel flow. The FPG on the driver side seems to be correctly set. I actually have a bit more hair than Steve at this point, but after months of weekend work, duh, I found something no one suspected, I think! HELP! Am I close to being right? Thanks! John avidfanjpl |
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| qa1142 |
Apr 23 2010, 03:36 PM
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#2
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Whiplash Group: Members Posts: 1,514 Joined: 1-June 04 From: Lake Zurich, Illinois Member No.: 2,140 |
Check the screens in the fuel tank (IMG:style_emoticons/default/idea.gif)
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| avidfanjpl |
Apr 23 2010, 03:54 PM
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914 Hemophiliac Group: Members Posts: 720 Joined: 6-April 10 From: Bear, Delaware Member No.: 11,566 Region Association: MidAtlantic Region |
[quote name='qa1142' date='Apr 23 2010, 02:36 PM' post='1308232']
Check the screens in the fuel tank (IMG:style_emoticons/default/idea.gif) That means taking OUT the fuel tank, right? I had it empty when I changed all the hoses, and believe me, it ran out like gangbusters when I yanked all the old hoses and only had 2 gallons in the tank. New fuel filter too. THANKS! J |
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Posts in this topic
avidfanjpl 73 914 2.0 Fuel Pump Apr 23 2010, 03:22 PM
kg6dxn Sounds like it's not getting prime. Could be b... Apr 23 2010, 05:57 PM
smg914 His fuel pump is located up inside the front trunk... Apr 23 2010, 06:06 PM avidfanjpl
His fuel pump is located up inside the front trun... Apr 23 2010, 06:46 PM |
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