Car shuts off

Asked by GuruBHXS8 Jan 02, 2019 at 08:41 PM about the 2003 Ford Focus ZX3

Question type: Maintenance & Repair

When driving and start to slowdown car starts to
pulsate the longer I am at a stop light it pulsate
heavier and on occasion it shuts off, while driving
at a normal speed do not have the heavy pulsation
nor shutting off, what could it be, motor mounts,
serpentine belt, front and back brakes was
replaced, the problem is still there, engine light is
on the dashboard code refer to an evap control
system, large leak, please I will appreciate if
someone could come up with an answer, so far
different mechanic cannot hit with the problem,
and I keep spending and the problem is not getting
solve.

2 Answers
9,720

Mike answered 5 years ago

Has it ever been tuned ie. plugs, wires, fuel filter and check the fuel pressure regulator to see if it's leaking at idle, just disconnect the vacuum line to the regulator and start the engine if you see gas replace the regulator.

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7,605

Brian answered 5 years ago

I have a few ideas. Check the condition of the seal ring on gas cap. Have a look at your evap lines from front to rear, might just be a cracked or loose hose. Clean air idle control valve. See if one of those helps. Good Luck!

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