OK..after a new distributer.and a moderate 7psi, my car started running like crap, and check engine was throwing a code 43. I replaced o2 sensors, and the a/f gague is reading decent (rich) at WOT..and my car seemed ok...but the boost gague was only reading 4psi, when i didnt touch it from 7psi before the o2 sensor..no vaccum leaks or anything, but now when I stomp it, the a/f goes from rich down towards lean, and my car starts hesitiating...the FMU is installed properly. the fuel pump is running right. I dont know what to do. Im stuck...Ive been boosted for about 2 months, and my car has run right for about 1 month. I have no idea what to check..could i have fouled my plugs..Im hoping that it is something stupid--

 

up

 

ttt

 

what kind of fuel pump, FMU rise rate, and injectors do you have? Do you have a fuel pressure guage?

 

I was going to say check to see that the fmu isn't hooked up backwards, but you said it's fine. Check your plugs to see what they look like. You said no vac leaks, make sure the back of the gauge has no leaks either. Make sure your boost gauge tube isn't pnched so you get correct readings. HHHmmmm, I can't think of what your problem may be.

 

Do a compression test just to be safe.

 

the fmu is fine..i think it is 12:1 thats what comes with the drag kit rite?..the plugs were kinda grey when i took them out..but didnt look too bad...stock injectors..dunno the distributor that i got was "remanned" do you think that maybe that pos is messing up...I am getting the FPR gague tomorrow..


[Modified by blkDOHCsol, 9:37 PM 2/12/2002]

 

Check your timing! Make sure it isn't to retarded or advanced. Just a thought.

 

My car has hesitated since i got my motor put in. It only hesitates when it is warming up anytime between cold and just before fully warm it hesitates and will jump at about 4.5k i dont know what it is either but my car throws code 7. Dont know if that helps you at all but might give a little more insite.

 

Dunno guys, i may disconnect the intake piping from my tb, so i wont be boosting, to see if the problem is boost related, im pretty sure it isnt..but what the hell, ill try anything..