Engine Performance problem
1993 Mazda b2200 4 cyl Two Wheel Drive Automatic 200000 miles
Have cleaned carb, replaced needle & seat, and all gaskets and " O" rings, checked float to be sure that it floats, Checked fuel pump pressure and it was only 1 to 3 lbs. Tried a new after market fuel pump just to see if it made any difference and it did not. Did not think it would. Engine runs for short time only until the flooding kills the eng. Then you have to wait for a while the fuel evap. Replaced the ox sen. Took the computer out and looked at the board inside for damage, none shows. The fuel in the sight glass on the carb. Seems to stay at the right level. Is something in the carb. Or is it the computer? Or is it something else that I have not thought of? I am 70 years old and can not afford to wast money on wild guesses. My SS check will not go that far.
If its flooding out the fuel will rise above the sight glass line-No pin hole on the float and needle seating properly-still points to internal problem with the carb-
What do you have an electric fuel pump or mechanical pump?
July, 17, 2008 AT 7:31 AM
Thank you, for your fast response to my question. The fuel pump is in the fuel tank. The fuel in the sight glass is at the right level. The float is a solid foam type and does float. There are 5 solenoids on the carburetor. One of the solenoids is inside the carburetor. It is a long tub type that runs from the top of the carburetor to the bottom of the fuel bowl with a "O" ring on each end (which I have replaced both). It seals over the top of a hole in the bottom of the fuel bowl. Which indicates to me that this some how might regulate the fuel flow to the engine. If that is correct then the computer that controls all of the solenoids could be at fault. My question is how do I test them to find out which one is not working properly?
Thank You Jerry
July, 27, 2008 AT 8:30 PM
now are u sure its the crab and fuel issue
did u check for spark after it stalls on u
I would do so
u can use an ohm meter to test the solenoids
thinks to check
Ã Ensure correct choke adjustment and operation.
Ã Check ignition system for intermittent operation.
Ã Ensure idle mixture adjustment is correct.
Ã Check vacuum hoses for leakage and correct routing.
Ã Check PCV operation by clamping hose shut. If problem goes away, replace PCV valve.
Ã Check A/C cut-off system.
Ã Check altitude compensator valve operation.
Ã Check EGR valve condition and operation.