89 civic problems HELP!

[89civicLS]

I bought a 89 civic with a 90 ls swap
cant figure out whats wrong with it

It backfires and runs like ass. wont rev past 3000 er so
almost like the ecu is in limp mode but i tried a new ecu any suggestions?
also changed spark plugs and wires cap and coil ive checked the timing and it seems okay

 

[AHHVTEC]

what codes is the ecu flashing

 

[89civicLS]

4 8 9

 

[89civicLS]

im almost to the point where im gunna rip it all out and re do everything

 

[AHHVTEC]

fix those codes and it should be fine

 

[89civicLS]

Crankshaft Position Sensor
Top Dead Center
CYP Sensor

the car ran fine when i got it then after a week all three sensor just went out

it seems like a bigger prob to me

 

[AHHVTEC]

well if it was me i would try a new distributor. it has things in it that can go out and put it in limp mode

 

[89civicLS]

alright thats what i was thinking too
maybe ill try a crank sensor too i did some reading and it said that would make it rev bounce and limp mode

also cleaning the iac could be clogged and the 02 sensor

 

[89civicLS]

any other people wanna help
got the timing perfect today car starts runs like ass
also put the new o2 in

 

[thirteen_20]

Crankshaft Position Sensor
Top Dead Center
CYP Sensor

all of these are integrated onto the distributor. the entire casing has te be replaced in order to change the sensors. if you change the dizzy to a known-good one, it will probably fix your problem...