Major Problems: Car shuts off DURING nitrous run!!!! - Honda Prelude Forum

dvp95 · 05-30-2003, 10:21 AM

The scariest thing happened 2 days ago. I just installed a NX direct port kit on my h22 accord. I was told by some people online to use the 22N/16F jets for an 80hp shot. I was also told by someone at NX to use a 22N/18F @ 10psi for a 75hp shot. The direct port kit does not come with #16 jets, so I used the #18 fuel jets(waiting for #16 to come in), thinking that it will run rich because the stock fuel pressure is at ~42psi, and WOT im guessing a lot more. So quite a bit richer.

So I went to the track, turned on my NX controller, sprayed through 4 gears, then when I let go of the gas and step on the clutch to coast after the 1/4 track, the car turns off. Luckily I had enough speed to coast to a safe place. I tried to start the car but it wouldnt start. So I turned the key and gave it gas and it started. Everything seemed fine at that point so I took another run about 45min-1hr later. The same thing happened when I let go of the nitrous and stepped on the clutch....engine dies and starts when i give it gas. WHAT THE HECK IS GOING ON???? Could the engine die because there is too much fuel?

My setup:

98 jdm h22a, NX direct port, MSD digi6+ and SS coil, NGK bkr7e, 91 octane gas, and your basic intake, exhaust, pullies, action 2md clutch, fidanza flywheel.

How do you read my plugs? Some have told me that they are lean because of the electrode, but others have said that it is running rich because of the ring around it.

Please help me read my plugs, but also help me in terms of why my car turns off right after i stop the flow of nitrous. I also noticed that during the second and last nitrous run, that my nitrous didnt turn on in 4th gear. I checked the fuse to see that it was blown (20A).

Please help me guys

dvp95 · 05-30-2003, 10:58 AM

By the way, it seems to run just fine during normal driving. Starting up everytime with ease. I will be doing a compression test later today and will post the results.

CTPRELUDE · 05-30-2003, 01:14 PM

I am not really sure why it would die on you like that. I think thats its possible for the engine to die if its getting WAY too much fuel but I would think it would need to be flooding it. And that doesnt make since because of you have to give it gas for it to start up after it shuts off. Hopefully someone else here will have an idea.

dvp95 · 05-30-2003, 03:36 PM

I just did a compression test:

First test: from cyl 1-4: 190, 197, 200, 207
Second test: from cyl 1-4: 192, 202, 205, 202

dvp95 · 05-30-2003, 03:37 PM

Any reason to worry about the engine itself from those numbers?

laughin2.2 · 05-30-2003, 04:09 PM

You're just running way too rich, I can almost guarantee it. The 22 and 16 jet combo is for an NOS direct port kit not an NX one. You need to call NX again and tell them your exact setup and fuel pressure. Different solenoids flow different amounts of fuel and nitrous, so jets that work for one setup won't work for a different setup. Im sure that your motor is fine, but you need to get the right jet combo before you run again.

NXLude · 05-30-2003, 10:58 PM

To answer your other question, your Compression numbers look good....strong enough to hold the juice. Well, what were your numbers on the shot, you never said?

Padge · 05-31-2003, 05:35 PM

I would suggest using 93 octane or better

axion68 · 05-31-2003, 08:16 PM

Quote:

Originally posted by CTPRELUDE
I am not really sure why it would die on you like that. I think thats its possible for the engine to die if its getting WAY too much fuel but I would think it would need to be flooding it. And that doesnt make since because of you have to give it gas for it to start up after it shuts off. Hopefully someone else here will have an idea.

he probably has to give it gas to start it up to let more air flow into the motor. when something is flooded you have to give it gas to start it up, since there isn't enough air coming in at an idle to burn off the fuel.

MJShelgosh · 06-01-2003, 01:04 AM

Quote:

Originally posted by axion68

he probably has to give it gas to start it up to let more air flow into the motor. when something is flooded you have to give it gas to start it up, since there isn't enough air coming in at an idle to burn off the fuel.

I thought this problem was alleviated with fuel injected engines ??

axion68 · 06-01-2003, 02:41 PM

Quote:

Originally posted by MJShelgosh

I thought this problem was alleviated with fuel injected engines ??

hmm.. that could be true because I haven't ever tried starting a flooded fuel injected motor. I still think this would be the case though since at an idle you aren't pulling in much air.

laughin2.2 · 06-02-2003, 04:42 PM

I've flooded my motor several times and it is just like when you flood a carbed car. You just have to keep cranking it over and over and hitting the gas.

ScottH23 · 06-08-2003, 11:36 AM

Stock fuel pressure should be 24-31psi at idle and 33-40psi at WOT. You should be using the JDM FPR if you're not already. EDIT: didn't notice you have a 98 engine, dunno what difference that makes on correct fuel pressure numbers. Numbers I gave are for a 93.

NXLude · 06-08-2003, 11:01 PM

24 psi? Thats a little low....I have a 99 and stock fpr at idle is 38.....that can be verified in the service manual also....I find it hard to believe there would be that much difference between the 2