check engine light.

LANDY

LANDY

Regulate Racing
well i took the car home today, its all legal now.
on the way home i was cruising @ 70mph, got a little excited punched it and it hit 100mph real quick, as soon after i let off light came on:(, i stopped and plugged in my OBD II.
code says: fuel line press sensor.
i cleared the code drove home normal (worried). never came on again.
i think is leaning out at high rpms.
WHAT DO YOU GUYS THINK?
 
What pump is in it? Does it have a boost a pump? Definitely change the filter for a peace of mind.



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Several possible problems. Changing the fuel filter may help. If it has a BAP, turn it all the way up. If not, you need to get on a dyno where it can be datalogged to determine whether it's a problem with the pump, sensor, or tune.
 
Focus pump with BAP should have adequate capacity.

How much gas was in the car? Never go WOT with less than 1/4 tank.
 
FordNut said:
Several possible problems. Changing the fuel filter may help. If it has a BAP, turn it all the way up. If not, you need to get on a dyno where it can be datalogged to determine whether it's a problem with the pump, sensor, or tune.
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thae first thing i did when i got home was look for the BAP sensor, didnt see one. i think reimhart installs them on the left side of the trunk.
 
Focus pump without BAP may be marginal. Most people install the controls close to the subwoofer box.
 
I had a similiar experience after my fuel pump was changed to a high performance GT model, as part of the NOVI S/C kit.

It seems, someone told me, that the computer senses the increased pressure as an out of tolerance condition and activates the CEL, Fuel rail pressure sensor. I was getting a CEL often. I changed the fuel rail sensor, no help.

Turns out this parameter can be altered in the tune. I asked my tuner, Dennis Reinhart, for help and he sent me a revised file for my XCal 2. Now the CEL, fuel rail pressure sensor, comes on very infrequently. FWIW

But in case you actually have a bad fuel rail sensor, you can test it my pulling off the vacumn line and smell the sensor for gasoline. Should not be present.
 
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Unless you datalog you can't tell if it's too much pressure or too little pressure because they both set off the light with the same code. Too much is not a big deal, too little and you can blow the motor.
 
pat said:
I had a similiar experience after my fuel pump was changed to a high performance GT model, as part of the NOVI S/C kit.

It seems, someone told me, that the computer senses the increased pressure as an out of tolerance condition and activates the CEL, Fuel rail pressure sensor. I was getting a CEL often. I changed the fuel rail sensor, no help.

Turns out this parameter can be altered in the tune. I asked my tuner, Dennis Reinhart, for help and he sent me a revised file for my XCal 2. Now the CEL, fuel rail pressure sensor, comes on very infrequently. FWIW

But in case you actually have a bad fuel rail sensor, you can test it my pulling off the vacumn line and smell the sensor for gasoline. Should not be present.
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Pat, that all makes sense, i spoke with the gentleman who sold me the car, he said as soon as he picked up the car from Dennis when he S/C it, on the way home the same code came on, he called Dennis and he told him it was not a problem, to pass by his place and he could get the code not to come on as often, but the gentleman never did.:shake:
thanks for your input.
 
FordNut said:
Unless you datalog you can't tell if it's too much pressure or too little pressure because they both set off the light with the same code. Too much is not a big deal, too little and you can blow the motor.
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agreed. lean at WOT= BOOM.
 
I did have my fuel system pressure checked when I replaced the sensor and my pressures were good. 45lbs at low RPM I believe. The tech tested the pump with the full 12V from the battery (motor off, ignition on) and it registered properly, 90lbs(?) I seem to recall.
 
Kenne bell makes the little disks to go just before the frps that avoids spikes and the cel. But best to log and check your pressure.
 
If you don't have a log file for your SCT tuner let me know. I tried with mine and it told me I needed some log file installed. Not sure if that is normal or not for the SCTs.

You can borrow my Diablo tuner to run some data logs until I get the ride back together and need to get it tuned. Staying with the Predator as I like the user friendlessness of it vs the X-cal 2.

Todd said:
Kenne bell makes the little disks to go just before the frps that avoids spikes and the cel. But best to log and check your pressure.
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Good call Todd, they did an article about these not that long ago in one of the Mustang mags.
 
well, i datalogged the car. it seems to drop at fuel rails to 25psi at wot, while voltage at pump is 11.6 vdc. awaiting on spare time to install a 10 gauge wire with a 30amp relay to see what happens.
 
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