Need help, I have a 90 Si with B16A swaps OBD1, just recently I change the fuel pump coz it throws Code 43. After I done change the fuel pum the car runs great until I stops at stop sign, then the car died, wont back on right away need time. The only CEL is Code 23 knock sensor, but it been on before the fuel pump change. Anybody know what happen ?? Thank you

 

When is the last time you set your idle? If the idle is set correctly then it could be either your main relay or your ignition module.

 

im kinda having same prob. replaced my fuel pump with a walbro 255 when i went boost in the summer, not everytime i push clutch in and brakes at same time to stop rpms drop below 1grand. and sometimes even stalls. in for answer or ideas!

 

i have a similar problem.. b16a obd0. i hear it could a combination of things. anithing than can cause a rought iddle. but i need ansewres too!!

 

Idle ok, maybe I'll try the relay...

 

bump...

 

You try the main relay yet?

 

Found something, maybe it's the problem. My Friend check the car for me, and he almost give up. And then I told him that the cylinder number 2 sparkplug thread it's soo short unlike the others, just take 4 turn and it's tight up, then he told me that the problem. When I upgrade the fuel pump, the fuel delivery getting better, means more hot in the cylinder, easier to leak more for the cylinder #2, then I change new sparkplug, car getting better = hotter ignition, but leaking even more, then sparkplug wire upgrade, the car can stand long run no more. I need to rethreaded the cylinder# spark plug thread then see if it's the problem. BTW the main relay was OK.

 

Replace the main relay, fix the spark plug thread problem, now the car wont start at all....

 

bump... anybody ??

 

ignition timing could be wrong, use a timing gun to adjust timing, without a timing gun, try play around with the distributor, detonation can cause by incorrect timing, knock sensor was there to detect detonation

 

I cannot check the timing now since the car wont start at all, I dont think is the timing coz the car was running before all this commotion, and one more thing I found that the ignition switch getting hot and it melted. More confuse now. Is there maybe something wrong with the engine harness, Inlinefour made the harness for me. Any other suggestion?

 

bump

 

you have adequete fuel pressure?

 

I don't know If I have adequate fuel pressure, But I think I have enough since I upgrade the fuel pump. Do I really need to upgrade the Fuel Pressure Regulator too ? And maybe the fuel rail too ? Kinda short on money now

 

no i meant do you know if those things are working?

 

Yes it's working, as I say on top, the car can run normally it even pull hard, except when it's stop it dies. Gonna check the wiring now maybe there is short circuit, since the ignition switch too hot, any idea if there specific location should I check ?