90 crx with a b16a2 nd an LS and B16 cable tranny will not go past 70mph in 4th nd will accelerate ridicuously slow in 5th, RPM's are just as slow. ive swaped diff ecu nd still getting same results. please help, thanks.

 

Do you have any CEL's? What condition is the clutch in that is currently in the car?
Also, what transmission is in the car?

 

well i started with a S1 tranny with the stock b14 clutch nd pressure plate and now i have the Y1 with an ACT 6 puck clutch nd pressure plate. im usin a p72 nd ive swapped in chipped p28's nd chipped p72's nd still wont go past 70 in 4th. In 5th it will climb to like 85mph but at like grandma speed.

 

CEL= code 22, 7 (i think), and 41

 

22 is vtec, If its 7 that is your tps sensor. And 41 o2 heater

 

yea my dc headers dnt have a place to put an O2 but whats holdin back my top speed

 

Your tps is more than likely what is making hold back. Make sure yo u dont have the map sensor plug and the tps senor plug backwards.

 

go to a junkyard and find a 92-95 downpipe that has a o2 sensor housing...and what tranny do u have? cuz u just said in ur ad " a b16a2 nd an LS and B16 cable tranny "
which makes no sense to me, all i got outta that was that u have a b16a2 with i think a b16 cable tranny? and get a voltmeter and check the voltage on the tps and map sensors. sounds like one of the 2 is the culprit on your slow b16 issue lol sounds like my z6 would have a field day with it, in the current shape ur running, of course...but check those and get back to us