Lost Power, No Fuel, Help! |
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Lost Power, No Fuel, Help! |
Nogoodwithusernames |
Sep 28 2016, 01:57 PM
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#1
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Member Group: Members Posts: 239 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
So I got all the fuel lines replaced and it's been running splendidly, decided to take it to work today. Just a minute away from work it would die at idle after the 30minute fwy run, but I got it re-started and got to work just keeping the throttle open a bit when stopped.
I had to run an errand and started to get onto the freeway again and lost all power. Pulled over, opened the decklid and much to my dismay one of the fuel lines had popped off the right side fuel rail. I attached and tightened all the lines/clamps outside the car so it wasn't loose but it's back on and nice and tight again. Tried to start it and nothing, cycle the pump a few times and crank. Nothing. It tried to start a few times but wouldn't run. Got it towed back to work and I've checked a few things when I've had time. There is fuel in the lines still, but I don't seem to be getting anything from the injectors. At least on the driver side where I pulled them out of the manifold. I did play with the connector on the distributor and it seems to be well seated, as do the connections on the injectors. I can't imagine that all four injectors would get clogged at the exact same time either, just seems a bit implausible. I don't see how losing fuel pressure would then keep the injectors from firing but anyone have any ideas? |
Nogoodwithusernames |
Sep 28 2016, 06:22 PM
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#2
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Member Group: Members Posts: 239 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
Okay figured it out. Somehow it started running fuel backwards through the loop. So fuel started coming out of the stainless return line that comes into the engine compartment.
(disconnected lines to see if there was fuel flow, and there was! Just not the right way...) How could this have happened because it wasn't running this was previously. I had swapped each line one at a time and triple checked that it was setup the right way. And of course it ran before this. Is the pump running backwards somehow and how would that have happened? |
ChrisFoley |
Sep 29 2016, 10:13 AM
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#3
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I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
Okay figured it out. Somehow it started running fuel backwards through the loop. So fuel started coming out of the stainless return line that comes into the engine compartment. (disconnected lines to see if there was fuel flow, and there was! Just not the right way...) How could this have happened because it wasn't running this was previously. I had swapped each line one at a time and triple checked that it was setup the right way. And of course it ran before this. Is the pump running backwards somehow and how would that have happened? With the return hose disconnected in the engine compartment, when you run the pump you will get fuel coming up thru the return hard line, particularly if you have plenty of fuel in the tank. The reason for this is the overflow fitting on the pump which routes excess fuel to the return line thru the tee fitting. The path of least resistance will be the open line. There should also be fuel coming out of the rubber hose from the regulator. Go back and carefully check your fuel circuit. Also check your fuel pressure with a mechanical gauge added to the circuit, usually connected in place of the cold start valve on a 2.0L. The pump may be failing, or have a faulty check valve. |
Nogoodwithusernames |
Sep 30 2016, 01:00 PM
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#4
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Member Group: Members Posts: 239 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
Okay figured it out. Somehow it started running fuel backwards through the loop. So fuel started coming out of the stainless return line that comes into the engine compartment. (disconnected lines to see if there was fuel flow, and there was! Just not the right way...) How could this have happened because it wasn't running this was previously. I had swapped each line one at a time and triple checked that it was setup the right way. And of course it ran before this. Is the pump running backwards somehow and how would that have happened? With the return hose disconnected in the engine compartment, when you run the pump you will get fuel coming up thru the return hard line, particularly if you have plenty of fuel in the tank. The reason for this is the overflow fitting on the pump which routes excess fuel to the return line thru the tee fitting. The path of least resistance will be the open line. There should also be fuel coming out of the rubber hose from the regulator. Go back and carefully check your fuel circuit. Also check your fuel pressure with a mechanical gauge added to the circuit, usually connected in place of the cold start valve on a 2.0L. The pump may be failing, or have a faulty check valve. Chris, Thanks for the detailed explanation of that. I'll put the fuel loop back the way it should be and check for flow from the pressure/inlet side this time. Of course I forgot my pressure gauge again today (IMG:style_emoticons/default/headbang.gif) maybe I'll pick up a cheap one at lowes after lunch. |
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