Everytime I stop at a traffic light, my Focus surges and it feels like
it wants to stall....even when I am in park with the car running! My
engine light came on and when I took it to the mechanic, he said that it
is a problem with the gas cap not being tightened enough. I asked if that
would make the car surge and he said that my car is fine. It now has
worsened and the light came back on in 2 days. If anyone has any info on
this problem...please share!!!
If your mechanic did not run it for codes, go to someone who will. This
requires a diagnostic machine. Most likely your problem is a sensor, and
will be fairly cheap and easy to fix, but it requires a competent diagnosis.
I agree with Dave.
If the engine warning light has come on there should be a fault code
logged, which a Ford dealer or other competent mechanic with Ford
diagnostic equipment wil be able to read. From that they should be able
to identify the problem.
I have a 2001 Focus as well and had a similar problem. It ended up
being a vaccum leak at the EGR Valve, but I also ended up replacing
the PDFE sensor, which is a common failure for the focus.
Me recommendation is to check for a vaccum leak. Other potential
troublespots could be the PDFE sensor, EGR Valve, Mass Air flow
Do you have the engine light code?
I think he meant does your computer contain a problem code. You need a
service technician with the right diagnostic equipment and decode
information to access it. All this is a trivial operation for a shop with
the right equipment.
I think you can get to it from the dashboard.
There's a description of entering test mode on the instrument cluster
I recall reading a similar procedure here and did it once or twice
when my Focus was new.
I don't think the dashboard diag mode will give you all the OBD-II codes,
just stuff involving the dashboard instruments diagnostics.
But I could be wrong.
There's an easy way to tell, disconnect and plug the vacuum line to the
EGR valve and drive around until the check engine light comes on, put
the LCD into diag mode, and see if there's a code. I can't remember
for sure now, but I believe I tried this exact experiment, and there
were no codes, despite the MIL being lit.
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