rotoboy20

well, i just changed and cleaned my grounds,but im still haveing the hesitation at 3800 rpm. anywho, my A/F guage shows me that it leans out really bad at that engine speed if im on the throttle hard, but if i just creep up to that engine speed(gaining 500 rpm in four seconds) and i surpass it slowly, it stays nice and stoich but close to rich.

could this be the 5/6 ports? i noticed this morning that the "dead band" that i sometimes dont even feel has widend it self, ofcourse the motor was cold when i noticed it. didnt matter what i did, there was a 400 rpm range between 3600 to 4000 where it just craps out.

it did decrease when it got to running temp but its still there non-the-less.

rotoboy20

PLEASE HELP ME!!!!! this dead band **** is driving me nuts!

SOIA

Have you checked your AFM connection?

rotoboy20

yes it works just fine. when it has its little poop out at 3800 it leans out untill its out of that rpm range. you can clearly see where the fuel starts to cut out and then back in again. strange isnt it.....

SOIA

extremly

SureShot

You have done the best fix.
Maybe check & clean the plug connections on the secondary injectors.

rotoboy20

ill try it...
sure it dont have n-e thing to do with the aux ports?

Bio-Weapon

It does have to do with the aux ports... since they open at ~3800rpm, so they add extra air, but thats also when your secondaries are supposed to come online, so youre losing fuel and gaining air. That's why you're going lean. I would definitely look at your secondaries.

HAILERS

Not auxillary ports. Is a secondary injector issue usually related to an ECU ground problem with pins 2C,3G,2R and 3A. Somewhere in the Archeives there is a thread by RXSTR on how to deal with that.

Kai

100% classic 3800 hesitation.

It looks pretty dramatic on a wideband dyno printout. I was suprised.