cant go into wot and boost

[JCell]

so this started today. the car drives ok, vacuum holds at about 23, but whenever I try to full boost the car jerks violently and wont hold. but i can half boost 5 psi fine.


wideband reads usual until the jerkiness starts, then goes full lean.


any ideas? i havent started messing with the car yet but i have tomorrow off so i plan on taking things apart until i find the problem

 

[Ep3 Tom]

I have no clue what your mods are but it could be a few things. I would first check to make sure all its getting correct spark. Spark plugs, coil packs etc. Sounds like a bad injector or a fuel pump. Are you using anything to datalog?

 

[JCell]

no, i dont have any data log available, only reading is the wideband.


ill check the spark plugs tomorrow

 

[TWISFM]

oh noes

 

[DubbyDoo]

around what rpm does it happen 4kish? could be fuel cut

 

[JCell]

yes, it does happen at around that rpm.

then again, i havent tried boosting in the last couple of days because of the never ending rain, once it stops a lil bit ill check things out

 

[DubbyDoo]

seemed like when ever i had that problem it was cause it was wet or humid out

 

[DubbyDoo]

i just bought a joep fuel cut defender problem solved

 

[JCell]

it could be weather related since it started during a pretty big storm

ive never experience fuel cut in my car b4 so im not really sure if thats what im feeling

 

[DubbyDoo]

well fuel cut feels like when you hit around 4k the power die and then kicks back then die and kicks back usually around ever 500 in the rpm range

 

[JCell]

thats exactly what happens

thanks man, i guess it was time for this to finally start happening. been pushing the car more and more with no ems or boost control for a while

 

[TWISFM]

j- what happened with this?

 

[JCell]

ive been out of boost, my best friend is coming for the weekend so we'll take a look at it then


no boost sucks...

 

[JCell]

well, i checked a bunch of stuff, cleaned sensors, and redid some vac lines

problem solved, holding boost and the AFR is a little bit richer, which is good

it was probably the maf

 

[TWISFM]

...nice


its never a big problem

 

[mp3-79bronco]

yep definitely the maf...i know from experience!

 

[JCell]

yeah, figured as much

my filter is right behind the radiator, and its been raining pretty hard these couple of weeks

 

[mp3-79bronco]

same here mine actually sits like right between the rad and the tranny in that big hole....i took in a lot of water though

 

[Outlawstar98]

Glad to hear its fixed