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Post by northernfarmer on Jul 24, 2024 19:10:25 GMT -6
I have to wonder if the fuel pump is worn internally or resistance in the electrical system to the pump lowering the voltage, either way just not capable of delivering enough fuel at that high a demand. If it was an ignition issue I doubt it would have the ability of running that good, then falling on its face and recovering and running strong again. Same with faulty fuel injectors or its electrical system, I would be surprised if it could react that way. My guess would be lack of fuel pressure/volume. You changed an inline fuel filter ( is it possible someone put something else inline that is not factory although I would doubt it ). Is there some sort of fuel pressure regulator at the engine or just a max pressure that the pump puts out. No doubt there is some minimum pressure that is desired for the system under max demand, that is where having a pressure gauge able to tie into the system would tell a story. Also not sure with its system if its possible for a vacuum to be created in the tank causing it to struggle to get fuel although I would think that would take longer than the distance your talking about.
So here's a question, what happens if you drive more easy, easing up to highway speed for example .. will it behave then or will it still act up just like this ?
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Post by cptusa on Jul 24, 2024 19:39:27 GMT -6
New air filter. Pulled fuel pump, tank looks clean.
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Post by northernfarmer on Jul 24, 2024 19:42:03 GMT -6
New air filter. Pulled fuel pump, tank looks clean. But it is the same fuel pump, correct ? |
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Post by cptusa on Jul 24, 2024 19:46:01 GMT -6
I have to wonder if the fuel pump is worn internally or resistance in the electrical system to the pump lowering the voltage, either way just not capable of delivering enough fuel at that high a demand. If it was an ignition issue I doubt it would have the ability of running that good, then falling on its face and recovering and running strong again. Same with faulty fuel injectors or its electrical system, I would be surprised if it could react that way. My guess would be lack of fuel pressure/volume. You changed an inline fuel filter ( is it possible someone put something else inline that is not factory although I would doubt it ). Is there some sort of fuel pressure regulator at the engine or just a max pressure that the pump puts out. No doubt there is some minimum pressure that is desired for the system under max demand, that is where having a pressure gauge able to tie into the system would tell a story. Also not sure with its system if its possible for a vacuum to be created in the tank causing it to struggle to get fuel although I would think that would take longer than the distance your talking about.
So here's a question, what happens if you drive more easy, easing up to highway speed for example .. will it behave then or will it still act up just like this ?
There is a fuel pressure regulator I have not replaced. Doubt there is a vacuum in tank, I suspected this too and tried it with fuel cap off yielding same results. You asked about easing up to speed... I tried this too, maybe made it last slightly longer. Now if I drive it like I stole it and am running from the law hot on my tail I can get her to hang in there pretty good. By this I mean you're hammering the bitch and coming to a stop sign keep the engine around 1500-2000 rpm and smoke the brakes, power slide around corners, basically have a blast driving it. |
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Post by northernfarmer on Jul 24, 2024 19:59:23 GMT -6
There is a fuel pressure regulator I have not replaced. Doubt there is a vacuum in tank, I suspected this too and tried it with fuel cap off yielding same results. You asked about easing up to speed... I tried this too, maybe made it last slightly longer. Now if I drive it like I stole it and am running from the law hot on my tail I can get her to hang in there pretty good. By this I mean you're hammering the bitch and coming to a stop sign keep the engine around 1500-2000 rpm and smoke the brakes, power slide around corners, basically have a blast driving it. I still have the suspicion its a fuel delivery issue to the injectors or fuel delivery period. I've not had anything to do with test equipment for checking fuel pressure but I suspect that probably should be done before continuing to fire the parts cannon !.
By the way had you checked the voltage output of the alternator with some load on it to make sure its putting out a decent amount of voltage.
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Post by cptusa on Jul 24, 2024 21:36:35 GMT -6
Have not checked alternator output. That's a quick stab too.
I'm with you though, thinking it has to be fuel related.
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Post by OptimallyDismal on Jul 24, 2024 22:46:22 GMT -6
Could it be heat related to the crankshaft position sensor?
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Post by northernfarmer on Nov 26, 2024 12:51:46 GMT -6
This is something that sounds interesting, now if it actually works or instead creates problems and just empties your pocket book, that is a question I don't know. However based on their claims and a rep from Rislone has been interviewed on a diesel podcast and where I even heard about the products, they of course claim big things. Two items that were bring talked about was additives for the diesel exhaust fluid tank to help with clearing up crystallization of the existing fluid and the def injector etc as well as helping some with cleaning the dpf, and the other being a diesel fuel additive which they also claim can clean out the dpf system as long as the engine is able to run ok yet. Is it all smoke and mirrors, I don't know but thought some of you might be interested or know of someone that has been using it and has some feedback on the results. Go to products in the upper left and it drops down a main list and then goes into sub lists of the relating products. Maybe get your local Hutt Colony to try it first, they always like trying new things 
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