hello martin,thank you,no it is the opposite way,when it is cold it starts right away,when it is hot sometimes it starts from the second time,sometimes from the first time,when it is warm it refuses to start,just cracking and crancking,i am deffinit it isn't electrical,starter motor sounds sane and good.leftlanetruckin said:Weird if all 8 injectors went bad at the same time.
So, just so I am clear. When it is cold you have a hard time starting it, but when it is hot it starts just fine?
If that's the case, when it is cold turn the ignition key to the "run" position but do not start. Leave it in the "run" position for @5-10 seconds, then try to start it. If it starts right up, then the check valve in the fuel pump has gone bad, allowing fuel to return to the tank instead of staying in the fuel lines.
So far as your fuel pressure regulator goes, what is the fuel pressure at the test port on the fuel rail? That is the way to test the regulator. If the pressure is low, then it is a bad regulator or fuel pump.
hi rich.autologic was put on the car,no faults are present,i wanna test the pressure,how much should it be while engine running?and when must i check the pressure at the start sequence?Rich998a said:Maybe the air temperature sensor, or one of the other temperature specific sensors?
Has the mechanic put the vehicle on diagnostics?
I doubt there is an injector problem. There is a pressure valve on the rail running around the plenum in the right hand side of the car. Just check the pressure there with a pressure gauge as you go through the start sequence.
Cheers martin will do that.by the way if there is a prob in the injector pulse wouldn't it register a fault like injector open circuit?and if i remove and cleaned them in case of a leak,wouldn't it cure it?leftlanetruckin said:Fuel pressure should be 34-37 psi at the fuel rail test port with the engine running.
If that tests ok, leave the gauge on the port and see what it reads in @5 minutes. It should leak no more than @5psi in 5-10 minutes.
Only way to test the injectors for leak down is to remove them. You can however use Noide lights to check for an injector pulse signal.
Remove the plug from on top of the injector and put the noide light on the end of the plug. Crank it and check for a flashing light. That means the injector is getting a signal to fire. Repeat on the other 7 injectors.