ok my car has a bogging problem as the title says. usually (99% of the time) it happens when i powershift 3rd, directly after shifting it will bog. if i stay in it it will stay bogging, if i get out of it and back into it it goes back to normal. it has happened in 2nd gear twice and 3rd gear too many times to count. datamaster shows that it IS NOT seeing any knock so that isnt it (though i did de sensitize the knock sensor as a precaution). i was also talking to a friend and he suggested playing with the timing up top, so i changed the timing around a little and that didnt effect it at all. does anyone have any ideas what it could be, im totally lost to what it may be. its a fms 234/241 cam, svo 30# injectors, most other bolt ons minus a throttlebody.

david

 

Did you change the ecm for those injectors? Have you had it tuned for that cam??

 

yes, all of that has been taken care of. madz28 did the tune then it was tweaked on the dyno to get the most power

 

Does it just bog or is missing, cutting out, backfiring? If it does any of those I'd be checking the ignition system.

Just thought of this too, does it bog only after you've ran it up to a high rpm or does it do it during normal driving too? This is just a guess but it could be yer running out of fuel at the top of the rpm due to the fuel pump not being able to keep up (or even a stopped up fuel filter) and it takes you getting out of it for a few seconds for the pump to catch back up. Just guessing here.

 

it only does it when powershifting (i shift at 6700) i can speed shift and it doesnt bog. when it "bogs" it just doesnt pull, its not missing or backfiring or anything, it just feels like its at like 50% throttle, but the tps reads 100%, i do need to get around to checking the fuel pressure, that idea did pop into my head

 

Same thing is happening to my Z.
When I flooring the car , shifting into third ... . Immediatelly after
the car feels like it bogs.... Looses power for a min , then
continues.. ( Does'nt feel like its missing)