why does my 2000 tundra cut out while accelerating

it only does it during the day time not during the night.

 

I laughed at first. Then I thought, maybe it has something to do with your charging system or battery. Because at night your headlights are on, taxing the system. Start off by checking the voltage of the truck at idle. Hopefully it’s somewhere between 13.5 and 14 V. Then maybe try it with your headlights on. How old is your battery?

 

Vampire truck?

 

You’re right, I miss read that. I thought it was only doing it at night. Vampire truck for sure

 

when reving to about 3-4 thousand rpms and let off the gas it acts like it wants to die but doesnt.

 

Maybe time for a little tuneup. Clean your mass airflow sensor and throttlebody, Check your spark plugs, they may be due. And maybe think about a fuel system cleaning. There are write ups around here.

 

brand new fuel pump and fuel filter

 

Does it do it when you first leave or after it's warmed up?

 

Day vs night - temp difference? Vacuum hose leak? Faulty plug wires?

 

sometimes it does it and sometimes it doesnt when im driving.

 

Did you get those CPS wires crimped back in good? Solid connections?

 

yes.

 

still acts like it wants to die at reving 3-4k rpms

 

Any problems starting the truck?

 

nope

 

fires right up.

 

Any CEL or codes?

 

nope.

 

Sounds like either fuel or evap system, possibly both. Like it's not getting enough fuel to run up high.

 

has brand new fuel pump and fuel filter .

 

i dont have any cats because they were clogged. so i cut them out.

 

I'm thinking more along the lines of the heat of the day causing a pressure build up in the fuel system. I could be way off as I have been before, but that's all I can think for the night/day issue.

 

how do i fix that ?

 

Let somebody smarter than me chime in and see what they say.

 

Sounds like there's a lot going on here. No cats, Cam sensor wire splicing, fuel pump has already been replaced etc. I would retrace all prior work and look for any problems you may have missed. Was the truck giving you these issues prior to the fuel pump replacement? Prior to the Cam sensor issue? When you say it acts like it wants to die but doesn't at 3000 rpm, what do you mean exactly? Could be any number of issues, you'll have to eliminate them one by one. No CEL with a truck that isn't running right is odd. Spark plugs, MAF sensor, TPMS sensor, injectors, evap system, charging system and battery, the list goes on and on.

 

it never acted like this b4 cats got plugged after i took the cats out it started having issues.

 

like the truck goes down below 1000 rpms . like super low then jumps back up to normal idling rpm.

 

Are you getting CEL ‘s?

 

no the only to lights that are on is the engine light and then the a/t temp light but as soon as the truck is running they go away.

 

it also has new spark plugs and coil packs.