[Jimmy]

Is it a automatic
I had a car that sometimes stalls when stopping
the reason of this was that the transmission was broke and when I stopt it couldn’t get is in neutral. It like you put you menual in 3 gear en you step on the brake. At one point the car will stall if you don’t use the clutch

I hope you understand what I mean

[Jimmy]

Oow yeah I forgot

It’s a Ford f150 1999
4.2l

[Jimmy]

OK I’ll try that and I will post tomorrow

[Jimmy]

Yes it did. it shaks a bit but it works

[Jimmy]

Yes I changed the relay and it had the same problem but I will check if I can find a broken cable

[Jimmy]

Yes I checkt and there was no voltage

[Jimmy]

oke so when I use my phone its not posting my comments

So I dont now whats happening right now
the fuel pressure holds but it will still drop when i turn of the key the pressure will drop 20 psi and then it will hold on to 30 psi

now then I driving down the road and I let of the gas somtime it will stall the rps will drop to around 500 rpm and then its just stalls while driving.
then I turn the key and it will start right up

I have no idea what it is

[Jimmy]

Ow I forgat the pressure is beter it still drop about 20 psi but it holds around 30 psi for a while

[Jimmy]

yes I did and there was no leaking

now i checkt the FPR and I pulled the FPR out it was real durty but its doing his job
because when I unplug the vaccum line and looked at the fuel trims there was no change
i was driving around for a while and suddenly the engine stalls. but it started right up again when i turned the key.

Im now thinking of the o2 sensor can that be durty ?

[Jimmy]

Yess I will check that and no its not changed

[Jimmy]

Yes I did and it wasn’t leaking

[Jimmy]

On a new fuel pump ? There is no other explanation for this problem ? I’ll go check on this problem but that’s not explaining the stft of -20

[Jimmy]

https://www.youtube.com/watch?v=zfR-b6W52VM

I know have the intake maniflod removed and clean up the the injectors
still the pressure drops what can it be now ?

[Jimmy]

fuel pressure ? or fuel pressure regulator. when the engine idles its not getting enough fuel pressure to the injectors ? look for that

[Jimmy]

Issnt your radiator clogged ?

https://www.youtube.com/watch?v=zUpXgAJ1gjU and watch this maybe you did somthing wrong

[Author]

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