Ok guys im new here but have been looking at threads here for quite some time now with no luck on my specific problem.

Well heres my problem i got a 90 crx hf with a b18a1, it runs fine until it warms up, when i hop on the highway it takes about a mile and my check engine light pops on. It feels like im losing power, once the light is on and i start from a stop it feels like it is lagging, when i get off the gas a little bit around 3k it has a little more power but still not what it is when i first start driving. Its like once something (what im trying to figure out) kicks in it starts acting up. So ive changed my o2 sensor 2 times, replaced fuel pump, checked my iacv valve, checked my vacuum lines, replaced the coil in my distibutor, got a new ecu, checked my map sensor.

Only thing i can think of yet is my fpr. Or maybe i dont have enough vacuum pressure or something. What do you guys think?

Any help would be great, thanks

 

How about the fuel filter? They can go bad. Also make sure that your car has the correct fuel pressure. Did you use a high pressure pump?

 

Filter is good, i got a 90 ls pump. I want to check my fuel pressure but i dont want to spend a bunch of money on a gauge for one use, but might end up doing that anyway.

 

I did a search and a lot of people say to check your gas cap.

You've replaced just about everything else, so try that

 

when i got this code i changed my o2 sensor same swap and everything

 

what ecu are you running pr-4??

 

does a high pressure pump make it not run right?

 

I know the gas cap would throw the code but would it make it run like ****? Anyway i took out the crx pump and put a ls pump in. I actually have 2 pr4 ecus, one is the automatic version which I got with the car which also gave me egr codes, and I have a manual pr4 (currently in) which only gives me code 43. It feels like a cylinder isnt firing once my cel comes on.

 

bump

 

Are you still having the same problem?

 

yep, i might just sell the bitch but it would be nice to figure it out so i can get a decent amount for it