gas smell
I have p30 chassis with a 454 tbi.Is it normal to smell gas when pushing the motorhome up hill with it in cruise.What could be causing this.I don't smell it any other time only when going up a mountai...
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There might be a leak at the presure regulator, or depending on the amount of miles on the engine some of the intake valve stems are worn and are creating a back preure under severe load, this will allow fuel to blow back yust enough to create the small, you need to find that as soon as posible, there is a fire danger.
Also check all the fuel lines giong to the thrtle body to see that none is loose or that there are no cracks where the lines are attached to the body, some times when mechanics overtighten the fitting they crack the tube inside and you do not see it until the unit is disconected and examined carfully, check that the throtle body is not loose or the it has not warped, it only takes a small opening for fuel to leak.
Have the mechanic perform a leak down presure test on the engine it will indicate if the rings are good, the valve seals on the exhaust or the intake valve guides are leaking.
It has been a number of years since I have done any vacum or fuel leak traicing on vehicles.
Hope it helps a little.
navegator
Also check all the fuel lines giong to the thrtle body to see that none is loose or that there are no cracks where the lines are attached to the body, some times when mechanics overtighten the fitting they crack the tube inside and you do not see it until the unit is disconected and examined carfully, check that the throtle body is not loose or the it has not warped, it only takes a small opening for fuel to leak.
Have the mechanic perform a leak down presure test on the engine it will indicate if the rings are good, the valve seals on the exhaust or the intake valve guides are leaking.
It has been a number of years since I have done any vacum or fuel leak traicing on vehicles.
Hope it helps a little.
navegator
