Saturday, November 20, 2010

87 suzuki samurai has lost alot of power.?

I have a SPOA samurai with 31 in tires, at first it was turnin the tires pretty good in 4th gear down the highway at 55mph and 3100 RPMs. Then the samurai wouldnt start, so i swapped the fuel pump with one of my xtras, it turns out that the PCV valve was clogged and so was the tube for it. Once i cleaned the tube and replaced the valve the samurai started but now it has lost alot of power. What could have caused this to happen. Only the PCV valve and fuel pump have changed. Afterwards i changed the fuel filter and drained the tank because it had sat for a year before i got it. Now i have to hold it wide open in 3rd gear at 4000 RPM to even make 45 mph most of the time on flat ground. The compression was checked and all cylinders were within 5lbs of each other. I need to know how many pounds of compression it should have to run good and any other suggestions as to why it could be lagging so badly all of a sudden. Im thinking maybe timing belt or ignition timing? Any sensors i should check? It seems to run ok, doesnt really sputter. just no power. Please help.87 suzuki samurai has lost alot of power.?
The cylinders psi should be around 170.

Air is getting through by the inlet manifold,most of it is avoiding the carb,re-check on pvc valve.

Check for a clogged air filter,add gas cleaning to tank or remove and clean carb.

Fitted nissan a12 Hitachi carbs on them the oe are troubles.