I re-built a B18a1 i had laying around with the following parts:

Hone job
B16 pistons with OEM piston rings
ACL bearings
B16 oil pump, and oil pan
Used all new OEM gaskets (except throttle body gasket, havent put it on yet)
Fresh valve adjustment, and timing check, both perfect
new OEM plug wires, and NGK plugs
odb2 LS distributor re-wired to ODB1.
unknown injectors

I am running the motor with a ODB1 DX ECU

Now...It runs ok.... but heres the problem

At low RPM (1000-2500) the engine runs fine, lightly stepping on the gas.

From about 2500-4000 the engine BOGS and wont move as fast as it would gradually stepping on the gas. You can hear what sounds like the throttle body giving a slight whistle while sucking in air. The engine sounds like its getting too much air, and not enough fuel, but i checked the plugs and they are black (which means its running rich)

Then, at about 4000+ the engine kicks back into running correctly and TAKES OFF.

I checked the cap and rotor, and they look fine. I havent checked to make sure all the wires in the distributor are all properly connnected... maybe i should

What i've tried to do to fix this:

Advance/retard the timing
Check the plugs (they are black... which means im burning rich)
New OEM plug wires
Changed the MAP sensor

nothing changed

The only things i can come up with are:

Shitty TPS or throttle body its-self
Need to put on that throttle body gasket
Get a propper LS ecu
Get a propper LS distributor



HELP




Modified by Simple at 9:15 PM 9/19/2004

 

sounds like tps
but i recommend u check it with a voltmeter

as 4 ur ecu chip it and run a uberdata chip

 

i fixed my o2 censor code. and nothing changed... could my MAP be reading incorrect pressure? i tried some different injectors, and it ran WORSE....

 

i got a TPS off a working throttle body. so i dont think its the TPS, but maybe the throttle body itself is fuckerd up.