Oil Pressure guage

[yankeebronco]

i jus had the oil changed and the oil pressure guage at a idle is none and the engine light comes on, if i rev it up it go's up and the light go's off. it is running great with no ticking .. Do you think its just the sending unit or what ,, 1989 351w c6 89 bronco 351w c6

[alanscott]

What was it like before the oil change?

[yankeebronco]

it was moving just a little with the gauge ,but was ok also i added flush to it befor the oil change..



89 bronco 351w c6

[galaxiefiveohoh]

My highly uneducated guess is that the flush you used broke up all the sludge inside your engine and now it is plugging up your oil intake screen. For as long as I can remember I was told to Never Never use an oil flush unless you were prepared to drop the pan to remove the crap built up around the screen.

[alanscott]

I am assuming the oil level is at the full line. I also don't know what you mean by a flush, an additive to clean out the engine? If so, galaxiefiveohoh might right on the money about the sludge, it also might have just plugged the little hole at the sending unit.

Since this happened right after the oil change though, it might be the filter is bad or they used the wrong viscosity of oil. If it was mine, I think I would install another quality oil filter, napa or wix etc. and see what happens and also ask about what oil was used. Then I would install a mechanical oil pressure gauge, the electrical sending units are famous for being unreliable. A general rule of thumb for oil pressure while hot is at least 10 psi at an idle and another 10 psi for every 1000 rpm.
If none of this helps, get back and we'll discuss the joys of dropping the oil pan.

[yankeebronco]

if it was the oil filter or the screen i would think it would be ticking ? no tick at all run's fine ,,??? im hopeing its the sending unit


89 bronco 351w c6

[fordtrucksforever]