Another chapter on on ongoing saga of my minor annoying S10 problems. I
was out on the road yesterday in 90 degree weather.
About 1 hour in the morning, and hour back during late hot afternoon.
I had just charged up the R134 and the air was cold.
On the way back, the temperature gauge was hitting 210. WHen it
stayed there too long, the truck would start to sputter like it was
starving for fuel. 210 seems hot, but its below the red line on
the gauge. Is 210 too hot for these conditions? I smell low fuel
pressure, but could overheated ignition also cause this? After a short
cool off, it seems to be fine when this happens. It also happened last
year when it was very hot. I asked this question last year and the
consensus was vapour lock could not happen due to the constant fuel
return to the tank. Could It boil in the fuel rail after the regulator?
Assuming its fuel, i have tried to find a shrader tap to hook a
fuel pressure gauge up to. So far, i have not. I have the shop manual,
but its not very clear on the 2.2. On the frame rail, there is a fuel
and the return line there seems to have a removable fitting. With
that fitting, you could tap it, but i would not think this would be
where to do it on the fuel return line. There does not seem to be one on
the fuel rail at the pressure regulator at the front of the engine.
There is a long hex head at the back of the fuel rail. Is this where the
fitting is? Is this removable? I did not want to put a wrench on it
until i was sure.
Any input appreciated.