good day again members, please help. i have a 95 civic vx with a b18b1 engine in it. the thing is the car stalls , sputter and looses power with the non vtec ecu in it (p75) i already tried 3 ecu and is all the same but with the vtech ecu the car runs fine but burns lot of gas and gives me vtec and o2 sensor cell. did full tune up new dizzy, timing is fine, but i cant figure out whats the problem. please help!!!!

 

Fuel pump, fuel filter, injectors? Have u check for spark or if u getting gas?

If u put a new fuel pump in make sure u got the fuel strainer on the pump the right way. My bro car had this problem too. It would idle good but when we gave it gas it would bogg and almost die like it's not pumping enough fuel, later we figure out he had the strainer turned wrong.

Or might b some sensors.

 

thankx for the reply man... i will get on it tonight, but i dont know if thats the problem cause with the vtec ecu it runs fine but with the non vtec it stalls like crazy. but i will try the fuel pump. i just dont want to keep putting parts and money in it and try to narrow it down. i already put new dizzy, full tune up with new plugs, rotors cap, alternation all of that. im just gonna end up selling it and i really dont want to

 

Have u changed ur o2 sensor? So are u getting any codes with the p75 ecu?

 

i did changed 02 sensor and with the p75 i dont have any codes, with the vtec ecu i get the vtec codes cause i dont have vtec any more.

 

Is it stock motor? What bolt ons do u have?

 

I believe the gsr ecu supplies more fuel than the ls ecu. So it seems to me ur having fuel issues. Check on that fuel pump and fuel filter and check ur injector with a tester, then if nothing changes then we can rule out fuel problems but it does seem like ur havin fuel issues.

 

ok i will check on fuel pump, relay and filter and see if that makes any difference and the engine is stock , all i have is headers, 2 inch pipes and air intake....

 

Borrow or rent a fuel pressure gauge and see what pressure youre getting at the fuel rail.

Thats better than just throwing money at parts.

Did it stall and run like crap before you did the tune-up?

 

Yeah before I did the full tune up it did stall and didn't run well at all so I did the tune up and hope that would be the problem but it wasn't. Today I install a new fuel pump and fuel filter. Ran good for about 20 minutes with the p75 then stalls again and almost die. I put the vtec ecu back on there and it runs ok but the rpm is always idles high about 1500 or so... I took the fuel pump off and returned it to the store . I really don't want to keep wasting money in parts like you say , but this is frustrating .... I'm gonna end up selling the car :-(

 

Oh and fuels pressure is very steady

 

Ok Guys so i kept Messing with The car and chanced The Main relay and The fuel filter, now The car runs great.... Even Took it to Nyc and gave me no problems .... Thank everybody.

 

Awesome.