f0de

75 shot of nos.. with a 2.2 '97.. no engine work, but after a few runs with nos the car kinda screws up around 5 grand without nos afterwards.. its either its running to rich, or the engine's breaking.. well i know that.. or is it the fuel pump giving it too much fuel? is there some type of safety feature that turns the rev limit down after the engine runs really fast or something? it feels like the rev limiter hits at 5 grand.. i run the car at idle for a few minutes to get the nos out of the engine, and turn it off a few times, and it runs fine again.. any one experiencing the same probs? or is my engine just slowly blowing up

23

What exactly is the car doing. I dont completely understand what you mean by "screwing up"

niedejb

75 shot is pretty big. May be "blowing out" your plug arc. Is it a stock ignition? At higher rpms the coil has less time to "charge" between fires so the intensity of the arc drops. The amount of nitrous youre flowing may be enough to overwhelm the spark.

You can either upgrade the ignition or drop your gap on your plugs.

Im guessing. The only reason I think its this is because you only have the problem while on the bottle. You dont have any probs above 5000rpm without the bottle do you?

RidinLow

Sounds like you're running way lean. Do you have an EGT or A/F meter? If it feels like you're hitting the rev limiter way before redline, that means that the ECU is cutting spark/fuel to the motor because it's detected a problem (most likely a lean run condition), which means that spraying NOS when this happens is very very very bad!

Letting the car idle to clear everything out doesn't do anything because the contents of the cylinder are ejected with every other piston stroke anyway.

I'd lay off the NOS until you determine (via a gauge) what the problem is. I doubt it's too much fuel because that wouldn't cause the engine to cut spark; it would just stall it & you'd see smoke coming out the exhaust beforehand.

f0de

its after i use the nos.. and only for a short time.. i'm guessing its the plugs as well.. it feels like its running too lean.. i'll get after market plugs, and would you recommend a new ignition?

RidinLow

All this tuning without some way of monitoring (gauges) engine health is a 100% guarantee that you're going to blow something up.

f0de

i have an a/f and a v-afc, my a/f popped off the o2 sensor tho.. need to reconnect it.. nothing strange on the pressure or anything on the v-afc

niedejb

My opinion....Spend $20 on four new plugs (NGK, HKS, etc). Gap em at ~.038" (stock is .044"). Try running off the bottle then. It may or may not help but all your out is 20 bucks and maybe lose an hour of your life. On the other hand if the problem gets better at all you may be on the right track and look into an ignition upgrade.

RidinLow is right running lean wont help you either. Any idea where you fuel pressures running? Need a fuel filter change? Fuel pressure regulator maybe.

RidinLow

Are you monitoring your O2 sensor on the AFC? What's the voltage at WOT while spraying?

niedejb

Any luck? Would like to know if you figure it out in case I venture into the bottle realm.

f0de

i haven't done anything to fix it.. it started doing it at random now without use of the bottle for a few days.. seems like fuel still.. friend said to get a fuel regulator thingy for my fuel rail.. 40 bucks or so.. and new sparks.. is a def, but new ignition wouldn't be necessary

RidinLow

If it's doing it without the bottle, do an ECU reset. While you're waiting for it to reset, visually inspect the plugs for fouling.

niedejb

While your at it, you may want to look at replacing your fuel filter. Night and day difference when I had mine changed. Dont know how often your supposed to....~every 30K miles?

RidinLow

Yep, 30k mi on the fuel filter.

Kiljaedoen

Hmmmm mabey its time to replace this, only got 45K on my car but who knows how it was taken care of b4.
Are any fule filters better that others preformance wise?

niedejb

IMO that filters are filters. The one AEM makes uses a replaceable filter (fram i think) and is more for show than anything. The only thing it could do is bump up your pressure w/o a regulator.

niedejb

f0de

Last I heard you were talking about track times (with mushy cluth). You still having probs with this? What was it?

f0de

yah 14.9 i ran at atco.. clutch is shot now hence the post about an accord clutch.. i still have probs with the bogging, i'm going to upgrade the fuel rail, and get some needed plugs.. need new brakes now too.. everything goes with a lil nos