JLSACESUP

The car runs great when the outside air temp. is cool. Now that summer
has arrived, temps here are above 100. Starts and runs fine for about
30-40 miles depending on the temperature. All of a sudden the car
lacks power when accelerating, the engine seems to surge while
speeding up. Pull over and shut the the car off. I heard a low whistle
sound coming from the fuel tank, it was the fuel tank vent hose. I
opened the fuel cap and alot of air pressure escaped as well as being
sprayed with fuel.

Attempts to fix the problem are as follows:
Checked all fuel lines for blockage including the return line from the
fuel rail to the tank. No problems
Replaced the fuel cap, no change.
Replaced the fuel pump, no change.
Replaced the fuel pressure regulator, no change.
I am not sure what else to check. Please can someone help me with this
problem. I drive this car 145 miles a day round trip to work. Only
source of transportation.
Thanks for any replies!

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82Mustang

"JLSACESUP" wrote:
> The car runs great when the outside air temp. is cool. Now
> that summer has arrived, temps here are above 100. Starts and
> runs fine for about 30-40 miles depending on the temperature.
> All of a sudden the car lacks power when accelerating, the
> engine seems to surge while speeding up. Pull over and shut
> the the car off. I heard a low whistle sound coming from the
> fuel tank, it was the fuel tank vent hose. I opened the fuel
> cap and alot of air pressure escaped as well as being sprayed
> with fuel.
>
> Attempts to fix the problem are as follows:
> Checked all fuel lines for blockage including the return line
> from the fuel rail to the tank. No problems
> Replaced the fuel cap, no change.
> Replaced the fuel pump, no change.
> Replaced the fuel pressure regulator, no change.
> I am not sure what else to check. Please can someone help me
> with this problem. I drive this car 145 miles a day round trip
> to work. Only source of transportation.
> Thanks for any replies!

i know this sounds too simplistic but could your vent be clogged. If
its whistling that means theres alot of pressure and not big enough
hole. I would say just drive around with the gas cap loose or off to
see if that the problem but on car equipped with EFI that throws off
the O2 sensor and turns your engine check light on. not a big deal but
the computer has to be reset by your dealership.

Jeff

"82Mustang" <DoNotEmail@AutoForumz.com> wrote in message
news:1_620984_bd7e0f61da969d9ba6725a809e122de7@autoforumz.com...
> "JLSACESUP" wrote:
> > The car runs great when the outside air temp. is cool. Now
> > that summer has arrived, temps here are above 100. Starts and
> > runs fine for about 30-40 miles depending on the temperature.
> > All of a sudden the car lacks power when accelerating, the
> > engine seems to surge while speeding up. Pull over and shut
> > the the car off. I heard a low whistle sound coming from the
> > fuel tank, it was the fuel tank vent hose. I opened the fuel
> > cap and alot of air pressure escaped as well as being sprayed
> > with fuel.
> >
> > Attempts to fix the problem are as follows:
> > Checked all fuel lines for blockage including the return line
> > from the fuel rail to the tank. No problems
> > Replaced the fuel cap, no change.
> > Replaced the fuel pump, no change.
> > Replaced the fuel pressure regulator, no change.
> > I am not sure what else to check. Please can someone help me
> > with this problem. I drive this car 145 miles a day round trip
> > to work. Only source of transportation.
> > Thanks for any replies!
>
> i know this sounds too simplistic but could your vent be clogged. If
> its whistling that means theres alot of pressure and not big enough
> hole. I would say just drive around with the gas cap loose or off to
> see if that the problem but on car equipped with EFI that throws off
> the O2 sensor and turns your engine check light on. not a big deal but
> the computer has to be reset by your dealership.

This will decrease your fuel mileage and harm the environment. The unburned
gasoline that you will be putting into the atmosphere and increase smog and
ozone.

It is a big deal if you like fresh air.

Jeff

Andrew Rossmann

In article <1_620981_0b89ff9efce6ac04c057e3e0adb1b453@autoforumz.com>,
UseLinkToEmail@AutoForumz.com says...
> The car runs great when the outside air temp. is cool. Now that summer
> has arrived, temps here are above 100. Starts and runs fine for about
> 30-40 miles depending on the temperature. All of a sudden the car
> lacks power when accelerating, the engine seems to surge while
> speeding up. Pull over and shut the the car off. I heard a low whistle
> sound coming from the fuel tank, it was the fuel tank vent hose. I
> opened the fuel cap and alot of air pressure escaped as well as being
> sprayed with fuel.
>
> Attempts to fix the problem are as follows:
> Checked all fuel lines for blockage including the return line from the
> fuel rail to the tank. No problems
> Replaced the fuel cap, no change.
> Replaced the fuel pump, no change.
> Replaced the fuel pressure regulator, no change.
> I am not sure what else to check. Please can someone help me with this
> problem. I drive this car 145 miles a day round trip to work. Only
> source of transportation.

I believe fuel vapors are supposed to be collected in a special
cannister, then slowly fed into the engine to be burned. Maybe that
system is clogged up or non-functional.

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sleepdog@optonline.net

Sounds like the evap system is not functioning. Check the canister
purge solenoid for correct operation and maybe you have a bad charcoal
canister or line to the solenoid? Maybe one of the evap lines to/from
the fuel tank are broken, crimped, etc. hard to say

GMACK24

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