Boosts up, but RPMs stay the same.

[Froyd79]

93 FWD Automatic (w/ 92 6bolt engine)
Stock
14b, M/T cams, M/T ecu, 450cc
Fresh rebuilt head
Fresh Bottom end rebuild 150 across
About 1k on engine
New plugs
New Knock sensor
Vac line elimination
Fixed all boost leaks


@ 1/2 throttle turbo spools up, but RPMs stay @ 3k
almost like the motor wants to go but something is holding it back.
Even @ part throttle it feels the same.

WOT it stutters and hesitates a tad bit but the RPMs go but not very fast.


@ idle low trim is 139 (maybe stock the ecu does this?)
Knock is irradic, sometimes Zero other times 43
Is there anything I am missing as to what could make it run rich/lean in stock trim?
Its not dumping any black smoke or any smoke for that matter.
I know the knock is pulling timing, but this feels worse than just some pulled timing.
Been so long since I had a bone stock car. Any thoughts ideas?

I should mention that other than this the car runs perfect off boost. No noises, runs through the gears fine, even has a low end pep, but as soon as you start to flog on it, it seems hesitant.

Also seems to run better when the car is cold.

 

[Apeximprt2nr]

Have you done a compression check on the motor?
Did you torque the knock sensor to 17 ft/lbs? Over tightening will give you false readings. Are the spark plugs gapped to spec, and have you checked your ignition coil?
A faulty fuel pump or injector wire harness connectors could also result in stumbling.

Good luck.

 

[Froyd79]

Yes sir comp test 150 across.
I am not gonna guess I will say I definately tightened it to more than 17ft/lbs so I willl check that
plugs are 32 and brand new 7es
did not check ignition coil will go over that
I have already checked but I think I am gonna double check the injector wiring.
Thanks for some ideas!

 

[burnnxs]

let the car iddle then start taking the spark plug wires out one at a time see if it makes a difference then put them right back just making sure that all your cylinders are working. just a thought

 

[roni-wan]

does it throw any CEL?

 

[Froyd79]

No CELs
I pulled the plugs and it ran like poop

I bottomed out the CAS and it ran gret for a sec then back to its old ways.
So at least I know it has the potential to run good I just got to find out what it is!
So weekend plans are
Set base timing
change fuel filter and basic fuel system check
Boost leak test
more thourogh injector wiring diagnostics!
go over knock sensor
then go from there!
Thanks fellas I will post back up my results!