Can anyone tell me what the pressure regulator, the hose that attaches to it and the ASV do. It looks like my connection between the hose and the pressure regulator is bad. The engine boggs down at about 1500 rpm down to 1000 then comes back to life. Once the engine is warm there is no problem. Pressure regulator seems to be very brittle and the nipple to attach the hose has broken down. Any pics and advice would be great. Thanks
88 FJ62 Pressure regulator????
- Thread starter NoiseyH2O
- Start date
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The vacuum line allows the fuel pressure to be increased during warmup (controlled by the coolant temp switch) by applying vacuum to the backside of of the regulator valve, which enriches the mix. If the nipple is broken or cracked that would mean you would possibly be running lean during warmup and have a vacuum leak as well until the engine gets up to temp and the vacuum valve closes.
Bill
Bill
Hi Noisey,
Bear with me since I don't have a 3FE or the FSM in front of me, so I'm going from memory. What do you mean by check valve? If I were in your shoes I'd put a vacuum gauge right before the FPR and see what it looks like at cold startup.
Bill
Bear with me since I don't have a 3FE or the FSM in front of me, so I'm going from memory. What do you mean by check valve? If I were in your shoes I'd put a vacuum gauge right before the FPR and see what it looks like at cold startup.
Bill
- Thread starter
- #5
This is the valve i replaced. What is happening is when I drive the cruiser before it is warmed up it will start bogging down about 1500 rpm and then start to work fine as I get up to about 30mph. Oncethe engine warms up I don't have any trouble at all during acceleration. Seam to me there is a check valve that is out of wack.any idea which one to start with?
- Thread starter
- #7
Link to the valve I replaced. Didn't fix the problem so I'm looking for some advice on other resolutions.
VALVE, CHECK(FOR AIR INJECTION SYSTEM). MANIFOLD AIR INJECTION SYSTEM for TOYOTA LAND CRUISER (1988, 1989, 1990, 1991, 1992, 1993) (9091710076)
VALVE, CHECK(FOR AIR INJECTION SYSTEM). MANIFOLD AIR INJECTION SYSTEM for TOYOTA LAND CRUISER (1988, 1989, 1990, 1991, 1992, 1993) (9091710076)
Function of the fuel pressure regulator and the vacuum switching valve.
"Fuel Pressure Control. The ECU sends signals to the fuel pressure regulator VSV to increase fuel pressure based on intake air temperature, coolant temperature and starting signal. By this system, engine restartability is maintained when the engine is hot. When restarting a hot engine, the ECU increases the fuel pressure above the normal level to reduce the fuel tendency to percolate. This helps restarting and also maintains the engine idle stability. The controlled fuel pressure is 21.2lb/in2."
"Operation. When the coolant temperature switch is ON (above 221*F) or higher, if the engine is cranked, the ECU turns on the VSV. As the VSV goes on, atmospheric air is introduced into the diagram [sic] chamber of the pressure regulator and the valve closes the passage. The fuel pressure becomes higher than the fuel pressure under normal driving condition by the amount of the intake manifold vacuum only. Even after the engine is started, the VSV remains on for several seconds."
"Fuel Pressure Control. The ECU sends signals to the fuel pressure regulator VSV to increase fuel pressure based on intake air temperature, coolant temperature and starting signal. By this system, engine restartability is maintained when the engine is hot. When restarting a hot engine, the ECU increases the fuel pressure above the normal level to reduce the fuel tendency to percolate. This helps restarting and also maintains the engine idle stability. The controlled fuel pressure is 21.2lb/in2."
"Operation. When the coolant temperature switch is ON (above 221*F) or higher, if the engine is cranked, the ECU turns on the VSV. As the VSV goes on, atmospheric air is introduced into the diagram [sic] chamber of the pressure regulator and the valve closes the passage. The fuel pressure becomes higher than the fuel pressure under normal driving condition by the amount of the intake manifold vacuum only. Even after the engine is started, the VSV remains on for several seconds."
- Thread starter
- #10
I have replaced all my vacuum lines. As I was doing this I had noticed that the wire going to the water temperature switch was almost disconnected. I reattached it but there was no change in the performance when the engine was not warmed up. Is there a way to check if this switch is working? Should I change the BSVS Valve (also a check for this as well). This seams to be the next step. The problems is'nt that bad as it makes me warm the cruiser up before driving, could be worse problems. Any Idea on cost? You guys have lead me in the right direction I think. There is a link below that shows the parts.
https://forum.ih8mud.com/60-series-wagons/467858-fj62-water-temp-sensor-replacement.html
https://forum.ih8mud.com/60-series-wagons/467858-fj62-water-temp-sensor-replacement.html