For the last weeks there has been a reoccurring, intermittent problem with the 1HZ.
Its been getting harder to start, all the time hot or cold, and when sitting at lights at idle it drops 2-3 hundred RPM and when accelerating away it won’t. The RPM goes up to around 2000 and stays there, the car starts blowing smoke and surges its way along the road for 3 to 4 hundred meters until it comes right. Embarrassing to say the least.
SO I thought it was a blocked fuel filter, changed it and it seemed to come right for 450 kms and then went silly again. Changed the filter again and it was ok for 30kms, until the lagging effect happened again at some lights. I tried to accelerate not much happened, got 300 meters and it became obvious the RPM was dropping slowly even though I was holding the accelerator in a fixed position.
Pulled over, not much choice and started cranking. It was trying to start, took three to four long cranks to get it to fire. I had to throttle the pedal to get it to keep going but it slowly died in a cloud of smoke.
Did this a number of times but it would not start and the smoke was getting embarrassing. Called wifey, went home and got tools and returned.
I disconnected the fuel line between the fuel pump and the filter and there was a fair bit of pressure in the line ??? this is not normal. So it seemed too much fuel was getting into the cylinders and drowning the combustion process. At the back of the fuel pump next to the dash pot is a lockable screw, I took a guess that it was a fuel adjusting screw and started to wind it out, the motor got progressively harder to start – but I got it to a position that I could hold an idle. Got Wifey to keep her foot on the accelerator and I started to wind the screw in – the motor responded to this and I could at least rev it up. It would not idle so I had to wind the idle adjustment screw in a far way to keep the RPM at around 1100 as it wanted to slowly die at around 750 rpm, normal idle speed.
Ok got home, but the motors not right. I have to re set the fuel pump, and I’m really not sure why this happened in the first place.
1 – Has anyone experienced this type of problem ? What was the out come.
And assuming there is nothing wrong with the fuel pump; and the fuel return lines are not blocked.
2 – I need to know what the procedure is for setting the fuel pump back to normal. My Gregorys workshop manual tells me stuff all about the fuel pump.