the walbro feul pump

[joe3180]

if you get the walbro feul pump do you need to get a fuel pessure reg?

[GraySilvia]

no

[joe3180]

so even though it is high pessure and high flow its still ok?

[GraySilvia]

yes, you don't need to change anything. The only reason you upgrade the fuel pump is so it can cope with the increased consumption at full throttle, especially extended full throttle, like drag racing, etc. You can get away with a lot on a stock fuel pump, but after so long, it can't keep up with the demand for fuel and you wind up with a dangerously lean car real quick. The fuel pump is mostly a peace of mind kinda thing...

[joe3180]

well right now my car is idleing kinda bad and the person who put the motor in for me said it was cuz of the fuel pump and the car was starving for fuel and i had to upgrade it...can you think of anything else that could be wrong?

[GraySilvia]

All I know is I ran my SR for over 10,000 miles on the stock KA pump, and managed to run 13.1 with it, so I do have a lot of trust in the stock fuel pump...perhaps your plugs are dirty and old, did you replace them during the swap? Any leaks in the intake system will cause a silly idle. Clogged injectors will do the same. Have you set base timing since getting your car going?? (Hint: set it at 20 degrees BTDC, there's a few HP to be gained there) Lemme know if you want to know the timing procedure, or I think http://www.srswap.com has it on their FAQ. These are just a few possibilities I could think of off the top of my head.

[joe3180]

cool...thanx alot....what spark plugs did you use? whats the part number...thats the other thing i need to find out

[GraySilvia]

Ummm...just go to the parts store and ask for plugs for a '91 2.0L sentra. I'm using the NGK iridiums right now, if you prefer a more 'high performance' plug. Either should work fine. As far as heat ranges, get a 6 for a stock or mildly tuned motor, 7 for more extreme tuning.