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Ac weak at highway speeds
Restricted air flow will cause it to freeze, like dirty evap. Or leaves or mouse nest in front of it. Also a low charge can make them freeze up. But that doesn't happen very often.- Tiha
- Post #16
- Forum: 94-97 Tech
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Ac weak at highway speeds
Yes I mean block. Usually if there is water dripping it isn't freezing up too bad. No water, might be freezing. But seems like when they freeze up and ice over you shut the ac off for 20 minutes, it thaws out and works for 30 minutes again.- Tiha
- Post #14
- Forum: 94-97 Tech
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6.0 power steering pump upgrade
I found one on FB market place. Bracket, pump and pulley but the pump was shot. So keep an eye on marketplace. They still pop up from time to time.- Tiha
- Post #39
- Forum: 94-97 Tech
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Ac weak at highway speeds
Okay, sounds like the blower motor is not working? Could just be a bad blower motor. You can hit it with a hammer and see if it starts up. If the evap is freezing usually it will blow air flow. But if your blower motor is not working that won't matter. The ac low pressure cutout is kind of...- Tiha
- Post #12
- Forum: 94-97 Tech
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Ac weak at highway speeds
Easy to remember tip. The perfect freon charge on any ac system is when the inlet and outlet of the evaporator are the same temperature. Sometimes it is difficult to reach the evap, but a quick feel with your fingers is a great diagnostic tool. Needs to be past the expansion valve or...- Tiha
- Post #9
- Forum: 94-97 Tech
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Ac weak at highway speeds
So hard to troubleshoot over the internet. But it sounds like under charged. I would say over charged is possible but I don't think there is a high pressure cut out on these trucks. Going down the road there is plenty of air going across the condenser, that is not your problem. It would...- Tiha
- Post #7
- Forum: 94-97 Tech
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Extended cranking, fuel system tests.
For kicks here are the results from 3 of the injector tests. Good, marginal and fail. -
Extended cranking, fuel system tests.
I agree, doesn't make sense to just put 4 injectors in. as far as those bad injectors causing a no start. That is not the case, it is the reason I took them to a shop with a high dollar test stand. If they were bypassing flow the test stand would show it. The test I did running the return... -
Extended cranking, fuel system tests.
It has never thrown any codes until no start condition. It is low rail pressure while cranking. That is the only code that comes up. I am kind of at the point, am I going to waste time buying 4 injectors? Or put the failed used ones back in to do more testing? Seems kind of silly. But even... -
Extended cranking, fuel system tests.
Not sure what I am going to do yet. LPFP I have 62 psi while cranking. Hard to imagine there can be any issues there but who knows. Still trying to decide what direction to go next. Actually thinking more about the VCV, I never got a click or a buzz or anything. Seems dead to me. But there... -
Extended cranking, fuel system tests.
Okay, Injector test results. 1 failed miserably, IAQ test I think is what he called it. The computer cannot accurately control the injector. 3 more are what he called in the yellow, meaning they are not always responding accurately. Nothing that would cause a no start condition, so I need... -
Extended cranking, fuel system tests.
Great info, thank you. Now I don't have to go searching for it. I feel like I want to replace it. But then I also want to do glow plugs and valve cover gaskets and who knows what else, but really I don't need any of those things. Slight leak on the driver's valve cover gasket. Actually... -
Extended cranking, fuel system tests.
Injectors are out, look better than I expected. Off they go for testing this morning. I suppose the best I can hope for is to have 3-4 bad ones that bypass enough flow to prevent the rail pressure from climbing. Pulled the PCV, pressure control valve as well because I was there. Looks... -
Extended cranking, fuel system tests.
LOL true. I always have the weirdest stuff happen to me anyway. I mean most people pull the volume control valve and find rust or metal shavings. Nope, not me. Most people get a low fuel pressure warning. Nope not me. Most people get an injector code. Nope not me. Honestly should have just... -
Extended cranking, fuel system tests.
Hope it helps someone. Been quite a journey so far. Can't believe it is so hard to find info. Consistent info. or the typical follow ups. I hate that, no solution ever posted. Can only imagine it gets junked or sent to the dealer. I am back and forth on just buying injectors or having these... -
Door strikers = best $100 I've spent on this truck
No doubt, so what is the real problem? Body mounts? Weather stripping? I have a rattle or squeak that these would fix but that is not a very long term solution.- Tiha
- Post #153
- Forum: Aftermarket Super Duty 1999 - Current
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Extended cranking, fuel system tests.
After all that it would indicate the HPFP has failed. Whether it be an inlet suction valve stuck open and allowing fuel to just recirculate, or catastrophic failure, don't know yet. I am still going to pull the injectors and have them tested, but it looks like I am headed back to my original... -
Extended cranking, fuel system tests.
PCV testing, Pressure control valve. So the way this works, when you turn the KOEO it is open to allow the rails to fill with fuel, During cranking it shuts the flow off so the rail pressure can rise. If it is stuck open the rail pressure will come up slow, not rise, or rise but be too low... -
Extended cranking, fuel system tests.
Okay, to update and share what info I can. VCV, volume control valve, or valve on top of the pump. Seems like half these things go by different names. Anyway, KOEO I get no noise, rattle, vibrations, buzz, anything out of it like I read I should. So don't expect that. Did test that I have... -
Extended cranking, fuel system tests.
I never looked at the injectors that close, is it possible to get injection pressure back into the return line and blow the return lines off? Or is it just a mater of available fuel being diverted to the return? He said that an injector may not miss or act funny in anyway. May pass every...
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