All ActivityMost RecentMost LikesSolutionsRe: Difficulty timing a 1995 Chevy 454ciA comparison- I have had Chevy 1/2 ton 350 cuin PU's with Carburetor and throttle body. Carb's averaged 10-12 MPG. Throttle body averaged 18-20 MPG.Re: Difficulty timing a 1995 Chevy 454ciThe 4L has overdrive, the 400 does not.Re: Fuel pumpMr Gasket makes a line of fuel pumps that are sold at Auto Parts stores. They even make one for diesel that I am using on my farm tractor.Re: Won’t startPossibly fuel shutoff solenoid. They get weak over time and back pressure will keep them from opening until pressure is relieved. (over time/cool down) I had a CAT that would do it on a Boom Truck. If I came in from a run and shut it off it would not start after a short time. If I loosened a fuel line and the pressure then it would start right up. I was too poor at the time to buy the solenoid so I would just shut it off, then turn the key back on to keep the solenoid open so it would restart.Re: Almost disasterMechanic (?) probably got a text on their phone and forgot what they were doing. Everywhere I go I see people on the clock looking at their phone or on it.Re: Brake IssueCould be a defective relay valve not releasing or operating slowly. ?? Maybe a kinked air hose. ?? With MH stopped, press hard on brake peddle then release and listen for the air to exhaust. Is it instant or time release? I've worked on hundreds of air brakes on semi's but got out of it before disc came out so I'm guessing a lot. It should have standard generic air brake parts available at large truck parts stores.Re: Difficulty timing a 1995 Chevy 454ciHere is one kit that I found on google- https://www.summitracing.com/parts/smp-pr131t?seid=srese1&gclid=CjwKCAiAu5agBhBzEiwAdiR5tCYx3zV6Y93elFiMk0_QcCX3LwfZN_A5TmNh2G_6kDkYmG0ieaNZEBoC0xgQAvD_BwE I had a 1989 Chevy PU and replaced the tbi regulator back in about 1995 and it was a common problem back then.Re: Difficulty timing a 1995 Chevy 454ciRunning rough, backfiring, TBI's are known for having pressure regulator in them get weak. They are cheap and easy to change.Re: GMC Class AI see them for sale on FB Marketplace here in Florida often. Usually in poor condition or salvage. I have wondered what kind of gas mileage the get? I have had 2 Winnebago's 1974 and 1983 and lived with 6-8 mpg and wondered how they compare?Re: 1991 P30 454 intermittent surging, power lossI don't think it has been mentioned but, next time it is warmed up and acting up try removing the gas cap and listen for a vacuum sound. That would point to an emissions problem not venting. Another wild shot, possible muffler partially blocked. If it was a Ford you would be spending money on suspension corrections.
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