Need y'all's help w/ my Evo problem please.....
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Springer, I have tried the PC bypass but I'm forgetting in what order, so i will give it another shot...... Thanks
Dr Hess... I checked the manual method of code reading..... In stead of the engine light flashing out the bombers of the codes saved in memory, mine remains on and I have no idea what that means and can't find it in the book as even a possibility. Which sucks!
I have been determining that there is no fuel line pressure by:
1---- The noticeable sound from the fuel pump as it pressurized the lines is not heard.
2---- The fuel pump does not cycle as it should
3---- I can remove a fuel line and there is no fuel or pressure
4 --- No fuel is evident at any time in the throttle body
I'm open to other suggestions.
I will go and try to bypass the PC III again to make sure I didn't screw something up there. I can see how it is possible I would...... It's about 101 degrees in the shop, and I was already bordering on the side of being pissed off..... If you know what I mean........
Mikey
Dr Hess... I checked the manual method of code reading..... In stead of the engine light flashing out the bombers of the codes saved in memory, mine remains on and I have no idea what that means and can't find it in the book as even a possibility. Which sucks!
I have been determining that there is no fuel line pressure by:
1---- The noticeable sound from the fuel pump as it pressurized the lines is not heard.
2---- The fuel pump does not cycle as it should
3---- I can remove a fuel line and there is no fuel or pressure
4 --- No fuel is evident at any time in the throttle body
I'm open to other suggestions.
I will go and try to bypass the PC III again to make sure I didn't screw something up there. I can see how it is possible I would...... It's about 101 degrees in the shop, and I was already bordering on the side of being pissed off..... If you know what I mean........
Mikey
Yes I know it's new but I have had some parts that were bad right out of the box.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,200
Likes: 3,089
From: NW AR
Measure the voltage at the fuel pump. When the ignition first turns on, the ECU should energize the fuel pump, at least momentarily. If it doesn't, the ECU is not turning on the fuel pump and I would suspect an ECU or wiring problem.
Note that I know EFI in general but I am not a HD EFI expert.
Note that I know EFI in general but I am not a HD EFI expert.
Thread Starter
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6th Gear
Joined: May 2016
Posts: 12
Likes: 0
From: Carlsbad, NM
Update
Ok y'all. Bypassed the PC III. It didn't help. Double checked continuity on all wiring on Fuel Pump. Again all was good. Ran a hot straight to pump. No work. Thought ground might be bad. Checked for continuity and it was good but ran a hot and ground to the pump. No good. Pump must be bad, but the pump is hot all the time and it stops due to a pressure switch when lines are pressurized. So ... Checked voltage along fuel pump wire. 0 found. So thought relay might be bad. It seems to work when checked, but no voltage or continuity from relay plug TO the fuel pump. WTF! Regardless of whether the pump is bad or not their should be constant voltage through that wire, or at least continuity!
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
Stellar HDF Member
Joined: Aug 2007
Posts: 2,052
Likes: 342
From: Virginia Beach
Ok y'all. Bypassed the PC III. It didn't help. Double checked continuity on all wiring on Fuel Pump. Again all was good. Ran a hot straight to pump. No work. Thought ground might be bad. Checked for continuity and it was good but ran a hot and ground to the pump. No good. Pump must be bad, but the pump is hot all the time and it stops due to a pressure switch when lines are pressurized. So ... Checked voltage along fuel pump wire. 0 found. So thought relay might be bad. It seems to work when checked, but no voltage or continuity from relay plug TO the fuel pump. WTF! Regardless of whether the pump is bad or not their should be constant voltage through that wire, or at least continuity!
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
Ok y'all. Bypassed the PC III. It didn't help. Double checked continuity on all wiring on Fuel Pump. Again all was good. Ran a hot straight to pump. No work. Thought ground might be bad. Checked for continuity and it was good but ran a hot and ground to the pump. No good. Pump must be bad, but the pump is hot all the time and it stops due to a pressure switch when lines are pressurized. So ... Checked voltage along fuel pump wire. 0 found. So thought relay might be bad. It seems to work when checked, but no voltage or continuity from relay plug TO the fuel pump. WTF! Regardless of whether the pump is bad or not their should be constant voltage through that wire, or at least continuity!
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
Does anyone know if there Are any fuses in that wire I don't know about, or a fuseable in line link? I doubt it but......
Still hoping it begging for insight please.
Mikey.
One other thing that I have done a good many times is to remove the air breather, spray some brake clean or B12 chemtool in the throat of the T body, crank engine and see if it fires up. I have kept an engine running for some time giving it little sprays at a time
WP
WP
Stellar HDF Member
Joined: Jul 2014
Posts: 2,721
Likes: 243
From: NC
Hey Mikey - Look under your dash on top of the tank for a black wire with a spade connector, see if that has come undone or is not a good connection. You will have to remove the top nut near the speedo and the screw down by the seat to get it off. While under there make sure all of the other connections are good.
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