fjh Posted December 4, 2021 Share Posted December 4, 2021 21 hours ago, Vmac3 said: Does this vehicle have a primary fuel filter (fuel water separator) Davco or Racor type brand? If the primary side (suction side of the fuel system has a breach, then the symptoms will be identical as bad injector cups. I am not saying that the cups are a wrong diagnostic, I am just saying that there are other issues that will cause the same issue. Just make sure you get the correct diagnostics done as mentioned above. V Another cheap look at is the tank vent filter make sure its not plugged! And Vmac made the right call here check the cheap and easy stuff first ! Its very easy to make a bad call/ jump to conclusion when you see things happen three or four times in a row in short succession! another semi common issue with these is the fuel filter pedestal and the dollarstore hand primer supplied with the engine! just saying! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/68861-rapid-fuel-system-pressure-loss-after-shutdown/page/2/#findComment-484063 Share on other sites More sharing options...
Roadpower Posted December 4, 2021 Author Share Posted December 4, 2021 20 hours ago, Joey Mack said: a 'jug cant handle the volume of fuel that will be pumped... Ahh, okay that makes sense. Quote Link to comment https://www.bigmacktrucks.com/topic/68861-rapid-fuel-system-pressure-loss-after-shutdown/page/2/#findComment-484079 Share on other sites More sharing options...
Joey Mack Posted December 4, 2021 Share Posted December 4, 2021 the hand primers suck!!! MP-7 is not replaceable, gotta do a whole pad.. MP-8 can be replaced... 'F' n 'V', are on a good path... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68861-rapid-fuel-system-pressure-loss-after-shutdown/page/2/#findComment-484087 Share on other sites More sharing options...
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