Ok so i just put new motor in its a 355 with a com cam 501, edelbrock air gap intake gmmp rods bee hive springs srp pistons here is what going on when i get in to the throttle it feels like its holding back like it has a miss i did put in a lt4 knock sensor could that make it do this or is it not getting enough gas or what thanks need help asap

 

Have you had it tuned yet?

 

Second the tune...also might be a crossed plug wire. Very easy to do and very easy to check.

 

Scan it for codes,check the fuel pressure,double check the plug wires,make sure they are on the correct terminal..Are you sure the valves are adjusted correctly?

 

when we put the scanner on it wont read ....

what should the fuel pressure be set at .... ill check wires tomorrow
valves dont know lol .....

 

With the key on,engine off it should be 41-47 psi.

 

even with the stuff done to car do you think i need to put it up a lil or any thing

 

It was the O2 sensors we unplugged them and now it runs perfect thanks guys for the help

 

What scanner did you use? A lot of people see the 16-pin OBD-II style ALDL connector, and assume they are reading an OBD-II PCM. But the 95 is an OBD-I PCM, and you need to use an OBD-I scanner, with the correct adapter plug, or use jumper wires, as Shoebox shows:

http://shbox.com/1/xraycable.jpg

 

I was using a OBD2

 

That would explain why it didn't "read".