Mike S

Just curious if this would be a symptom, at 60lbs of boost with my foot to the floor the truck pulls really hard and then loads up or seems like it loads up, but as soon as I back off the throttle maybe a 1/8 to a 1/4" it takes off again; it is still accellerating strong but when you let off that little bit boy it takes off. I need some aftermarket springs anyway and am curious if this may be the reason. Thanks, Mike

Don M

Hi Mike,

I think it is fuel pressure related Man. Rail valve or maybe the CP pump is freakin.

Don~

Mike S

Hello Don long time no talk to; you should move your operation up here to Colorado so I can give you all kinds of business.. A flaking cp3 would be more my luck I do not get any codes so wouldnt that eliminate the rail valve? Mike

Don M

Sometimes that goofy valve will not cause a code to pop up and they will run wacky.

Grab a rail pressure gage, it will allow some tuning on the dyno and road too!

5300 PSI at idle and about 21-23K at WOT is what you will see with with a stock pump. Around 13k or so on the freeway at 70 MPH. Im not sure what yours will be, but maybe close at low speeds to my numbers above.

Don~

BCarmicle

Mike,

I may be experiencing something similar to what you are describing. I have my blow-off valves set at 65lbs. When I hit 65lbs. and activate the BOVs, the truck acts like it gets flooded with too much air and doesn't accelerate as well, it acts like the air can't get out quick enough. Then as boost drops below 65lbs. it accelerates quicker. I have set the BOVs at a higher boost, but that resulted in a blown head gasket. Don't know if this helped any but just something to consider if you have BOVs.

Brandon