Heres my problem:

From a stand still, if I hit the pedal for a fast takeoff, the engine dives a second or so then gets up to speed. This issue just started after my fuel tank, Fuel pump, and sending unit replacement and im not sure why.

Heres what I tried:

I know that Traction control can slow down the engine if slippage occurs, so I tried to replicate the problem with the traction control off and I cant seem to get it to dive again.

Has anyone else experienced this?

Today when I get out of work, im going to try taking the traction control off first, then try it and see what happens, then try again with traction control on.

Fuel Pressure was tested at Bills and was around EDIT: 39-40 or so lbs

All of the replacement parts mentioned above were aftermarket.

i would suggest checking your fuel pressure like i did.

Extend the hose, and run it inside the car, have someone hold it and make sure you get all "all" of the air out of the line.

Next go drive around, Full throttle and what not and idle at stop light and half throttle and stuff.

then see what its running at.
because when i first did mine sitting in the driveway it was WAY different from when i took it out driving.

I remember testing it at Bills and I thought it was 45 but it was lower than that I guess.

Someone hinted it to be a possible FPR. :?: :?:

I never tested pressure before replacment, and the pump is an aftermarket one which I do not know the name.

Carter

Do you run a K&N air filter? Or a very dirty/torn paper filter? If yes to either, then you may want to remove and look at the tiny little wires on the MAF sensor and make sure they are clean. Any large amounts of dirt or debris on these wires will make the engine lack performance. You can clean the wires with rubbing alcohol and a Q-tip, but be very gentle with the wires as they are fragile.

I had the MAF screen out not too long ago and just put it in about 2 weeks ago and all was clear. I am running a K&N filter in stock airbox, but I tried something today after work.

When leaving the parking lot where I park, I took the Traction Control off and mashed it. No loss of power or diving at all and the power was there. Im now leading to believe that the Traction control is the culprit. Not that theres anything wrong with it, it was just merely doing its job I guess. No issues with traction off.

I didn't know you had the MAF screen out. That screen serves a purpose! Most people (including the folks on here from what I've read) have no idea what that screen is for! It is actually very important for the engine computer to function properly.

Most enthusiasts believe that removing the screen will increase engine air flow and result in more horsepower. The truth about that screen that MOST enthusiasts don't know is its actual FUNCTION.

That screen was put there by GM engineers for a reason. The screen converts turbulent air into a straight flow pattern so the MAF sensor can "read" the air volume entering the engine ACCURATLY.

Turbulent air (swirling around) can not be measured accurately by the MAF sensor...the MAF sensor was designed to measure air volume with a straight flow pattern. When you remove the screen, you take away that straight flow pattern and create a turbulent, or "wash" air flow pattern that the MAF can not measure accurately. This results in false intake air volume measurements that the computer receives. The computer believes what it sees so it adjusts fuel and ignition according to its input values.

The input values are incorrect, but the computer doesn’t know this because the MAF sensor says it IS correct….and the computer believes ANYTHING the MAF tells it!

The MAF is one of the MOST important inputs the computer looks at. Altering the MAF by removing the screen is one of the MOST detrimental mods you can do.

i disagree completely.....