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I installed an edelbrock universal wet nitrous kit (#71820), using a 40 shot. First time spraying, I started misfiring (DTC's P0301, P0303, P0300). I had forgotten to change my spark plugs . Next I put in Denso Iridium IK22's. Sprayed again and got MIL (P0132 voltage high primary HO2S). Ok, so it started running rich. Sprayed again and started misfiring again (DTC's P0301, P0303, P0300) . Maybe fuel pressure is too low?

Any1 have experience w/ this kit, or similar problems?

I'm going to try to get some pics of my setup.

Thanks for any help/suggestions.

 
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If its misfiring and running rich, the running rich is your problem. I forgot to retune my VAFC before I started to spray a 75, and dumped wayyyyyy too much fuel and burpped out some black smoke and bogged a bit, after I leaned out a lil pulls like a raped ape...

 
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Yeah, my guess would be as good as his^ You are running too rich.

 
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Ok, finally got some time to try to tune. I put a smaller jet in for the n20.
supposed to be: .026 n20, .024 fuel. I'm using .025 n20 and .024 fuel.
I have an automatic. Tried spraying again...tranny was in 3rd...sprayed from 3000 rpm to 6000 rpm...turned off arming switch, kept foot on gas...tranny shifted into 4th...rpm's were ~5000...armed and sprayed again...misfire (MIL P300, 301, 303, 304) .
My kit came w/ a 5/16" fuel T and some 5/16" rubber fuel line. I couldn't get the T to fit in the stock fuel line, so I disconnected it (stock fuel line) and used the 5/16" line instead (w/ hose clamps). Do u think this 5/16" line could be causing fuel pressure problems? The stock line is plastic lined w/ rubber. My car runs fine when I'm not spraying, no MIL even when I drive it hard.

 
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26/24??? I know my NX 35 shot was a 31/18....hmmm you may be dumping too much fuel...try a 31/18(nx calls as 35 shot, or 35/20-50 shot)....either your running too rich or not the right plugs...

 
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must be the wrong jets becuase I was running a 50 shot on a stock ex with just intake and exhaust for a year. I had no vafc to tune but it ran find and no cel's

 
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thats what Im thinking, he's running almost the same size fuel jet I had on a 75 shot for a 40....def gotta be wrong jets bro....

 
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The Edelbrock kit instructions say:

_n20 | fuel | ~HP gain
.026 | .024 | 40 hp
.028 | .025 | 60 hp
.030 | .026 | 80 hp

These are the only jets it came with. I don't think they are compatible (have the same meaning) with NX kits.
Now I'm thinking it might be the location or the way I mounted the nozzle. I have a aem sri. I drilled a hole in the rubber reducer that connects the sri to the throttle body and mounted it there. The nozzle sticks all the way thru but not by much. I wonder if the fuel spray is hitting the lip of the throttle body and not mixing well.
BTW I haven't gotten any more running rich MIL's, only misfires.
I finally got a digital camera, so I'll take some pics tonight.
-thanks 4 your help guys.

 
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Here are some pics of the installation and nozzle.

 
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thats exactly how I have my shark nozzle...hmm I'll email edelbrock and ask them about jetting comparison... I believe all jets are essentially the same, the number is the opening size. I'll just contact them direct and get back @ ya...no worries between the two of us we'll figure it out...

Johnny G

 
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maybe your gap on the spark plugs is too far apart. Try closing the gap up a bit. I know on a lot of turbo cars guys are setting them up to like .030" or .032". If the gap is too far, it will make it hell to fire the plugs.

 
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the install looks fine.

 
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I'm a little uneasy about changing the gap on the IK22's, afraid of ruing them. Do u think such a small shot (40hp) would need a smaller gap? If I can't figure out anything else, I'll give it a try.

 
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Troubleshooting checklist:
-using 93 octane fuel
-changed spark plugs to Denso Iridium IK22's
-checked for any plumbing leaks
-checked that fuel solenoid is opening (pressed microswitch when system was armed)
-using bottle heater to pressurize bottle to 900-950 psi
-only spraying from 3000->6000 rpm

 
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dont be afraid of changing the gap. They survive the combustion, so im sure if your careful you couldnt do much worse.

 
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yeah I had atleast 5 people in 1 month(when I used to work @ autozone) try to swap out their busted iridium plugs because they tried to gap them.... try it if you want, but be seriously careful...

 
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I use the edelbrock wet nitrous system. It is adjustable to 40-60-80 shot. I just got around installing it this morning. The kit itself is awersome. Its a complete kit. It even comes with a pressure gauge.
I like this kit because it goes to the throttle body which makes using nitrous wayyy easier! I usually have the master switch on all the time from first to usually 4th.
The nirtrous doesnt activate until "WOT" which means when your pedal to the floor. Also, you wont have to click the switch off when u want to turn off the nitrous because it knows when u let go of the gas. Only time when you should turn it off is when going 0-100 etc. and are on 5th gear. You really dont need 5th gear.

I'm running 80 shots of nitrous. I set the jets to 80 shots from begining with no problems.

I drive a 5spd and always have the master switch on. This kit already knows when to spray and when not because the button it presses at the throttle body only when at wot.
Try leaving it on. All you have to do to release the nitrous is floor the pedal and when you want it off, just regularly press the pedal. It wont spray like that

If you have the edelbrock 71820 kit and remember if you havent received the pressure gauge. Go call up edelbrock and tell them you didnt receive it. They gave me pressure gauge and a longer nitrous line. You need to have your receipt though.

 
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My mods other than the edelbrock 80shot is V2 intake, stainless dc headers, aem pulleys, greddy evo-2 catback, dc short shift adapter, aem fuel rail(not out to public yet), Denso iridium spark plugs, hyper ground wire kit, and plenty of use of octane boosters and 91 octane 76 gas.

Car runs great with no internal modifications.

 
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Yea, that's the kit I have. It came with a pressure gauge on the bottle. Didn't know they would give u longer line if u asked for it. What kit # are you using?

My car is an automatic . I plan on installing a rpm window switch (to spray btwn 3000->6000 rpm), in the meantime I was just using the arming switch.

What size jets are u using? My kit says .030 n2o / .026 fuel for 80 shot.

 
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I was told our cars didnt like window switches.... I dunno might want to research it...

 
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Thanks for the heads up. I'll have to start another thread about this after my engine stops knock,knock,knocking on heavens door.

 
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Im using the 71820. Same kit as you. Remember that after you turn off your engine and if nitrous was used, you should wait 30 mins before restarting the vehicle to vaporize the excess gas which could be the problem you are getting engine knock. It happens to me, but if I let the engine rest for a lil it wont knock when its starting.
Edelbrock actually gave me the lines because the lines that came with the kit didnt fit the nozzle. So they gave me the only ones they have in stock, which was larger than normal.
Vic Edelbrock's headquarters is in Torrance near me, therefore, they let me pick up the items.
ANyways, just try to let your engine rest for 30 mins or so before restarting if you used the system

The kit should come with a master switch that wires through the throttle body. It already knows when to spray and only sprays at wot(wide open throttle).
THats the correct jet settings. Just make sure it goes into the right hole e.g. nitrous feed line or the fuel feed line.






Spraying in 1st gear isnt bad. Just know how your kit works and dont let the tires burnout.

 
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Civic_RedLine were u able to get the fuel T to fit into the stock fuel feed line? I couldn't so I took out the stock line and used the 5/16" rubber hose instead.

 
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Ok, after reading instructions for other kits (NOS, Zex, etc.), I'm thinking you called it right about the fuel jet being too big. Our vics have a fuel pressure of 40-47psi. The .026 n20/.024 fuel is probably for a much lower fuel pressure. I need a smaller fuel jet or need to use a larger n2o jet.

 
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I drilled holes to the fuel rail. I used teflon to keep it from leaking. Dont! use teflon if on your nozzles.
And you mean t as in TAP? TANK?
If you plan to take off the nitrous, get an aftermarket fuel rail like AEM and drill a hole to it.

My nitrous jetting:

Nitrous Fuel
.030 .026 80hp-----> my setting
.028 .025 60hp
.026 .024 40hp

.030

 
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actually my kit runs quite rich too. Make sure to open the bottle valve fully. Some people leave it a little closed.
make sure to mount your bottle in a 45 degree angle.
make sure the you have nitrous inside and keep it at 80 to 85 degrees. You got a pressure gauge.
make sure the lines going to your bottle in the trunk is facing downward.

 
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I meant the fuel hose barb tee, but I see that your not using it.

Do u know if/when aem will be releasing this fuel rail. How is the fitment?

That's an affirmative on all those. I'm pretty sure it's the jetting that's causing the misfiring. As an experiment last night, I kept the n2o bottle closed and sprayed (so only extra fuel was sprayed). The car sort of bogged and then misfired just like it did earlier. I'll have to get some smaller jets for fuel. I wish they weren't so dam expensive.

 
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Aem already made them. There right down here in hawthorne. I know some people around here that get the parts. AEM should be releasing it soon. Call your local performance shop. They should have it.

The jetting size I mentioned above are correct. Im running the 80 shot. Im running too much fuel for some reason. My car seems likes it dying then goes away when I pedal to the floor. Or when I start the engine, it wont start. This is because fuel left inside. Just press the gas while car is off.
Let me know if you have any of the same symptoms.
Basically Just call Edelbrock up because they'll tell you everything you need to know. If you also live close to torrance, you can go back to them and ask for correct jettings if your jettings didnt come complte.

Call: 1800 221-1666 Extension#2927
Ask for Chris Rowe (He is an Edelbrock professional and knows alot)
between 7am-6pm pacific time

 
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Update, I checked the gaps on the Denso IK22's. They are .028". I thought they were supposed to be shipped w/ a .044" gap (that's what sparkplugs.com has them listed as). Anyway, I doubt the plugs are the problem. Only thing I can think of are that there too cold (stock spec for civic is IK20, not IK22).
Guy from Edelbrock suggested changing plugs for NGK V-power (ZFR6F-11 I think) and gapping to .030. I might get these plugs since they're not expensive, but I still think fuel jet is too big.

 
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your plugs are only 1 step cold. That is fine for small shots of nitrous. It wont make it run like you say. You may have the fuel jet too big. Get the right nozzles before anything else.