Whats wrong?
#1
Whats wrong?
Hey yotatech, I'm having a problem starting my 90 4runner I thought that maybe it was the battery so I got a new battery, hooked it up Nd turned the key, it just won't turn over on the first try. Then I turn key again and it starts right up. Fuel pump? Or something else? Help!
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#9

The engine has to suck some air thru the AFM to switch on the pump, it's not activated by the key turned to ON.
What happens if you crank for a little bit longer or depress the gas pedal while starting?
There are three places the fuel pressure could be leaving the rail while sitting the pump it's self, the pressure regulator, or thru the injectors.
#13
I've been corrected for saying that before, your turn

The engine has to suck some air thru the AFM to switch on the pump, it's not activated by the key turned to ON.
What happens if you crank for a little bit longer or depress the gas pedal while starting?
There are three places the fuel pressure could be leaving the rail while sitting the pump it's self, the pressure regulator, or thru the injectors.
#14
I've been corrected for saying that before, your turn

The engine has to suck some air thru the AFM to switch on the pump, it's not activated by the key turned to ON.
What happens if you crank for a little bit longer or depress the gas pedal while starting?
There are three places the fuel pressure could be leaving the rail while sitting the pump it's self, the pressure regulator, or thru the injectors.
I've been corrected for saying that before, your turn

The engine has to suck some air thru the AFM to switch on the pump, it's not activated by the key turned to ON.
What happens if you crank for a little bit longer or depress the gas pedal while starting?
There are three places the fuel pressure could be leaving the rail while sitting the pump it's self, the pressure regulator, or thru the injectors.
#19
So you could possibly be getting too much fuel. Does it start any better when it has been sitting for a long time? ie. First start, after school/work etc. If so, it may be the Cold Start Injector being stuck open, or the CSI time switch or Engine coolant temp sensor. They all in a way, decide how much fuel the engine needs and if they are faulty, you can flood your engine. Check those.
It could also. possibly, be the Fuel Pressure regulator. . Does it ever stall at stop lights or when you turn the AC on?
The sputter, to me, suggests a fuel related issue. HOWEVER, something you should do that I have not read yet is check for codes!
It could also. possibly, be the Fuel Pressure regulator. . Does it ever stall at stop lights or when you turn the AC on?
The sputter, to me, suggests a fuel related issue. HOWEVER, something you should do that I have not read yet is check for codes!


