Ran the spray today...

[Shodown]

Good news and bad news.

Good news = everything wired up just fine and had no install problems. First run went great, sprayed fine and took off like a rocket!

Bad news = Second run was fine until I hit about 60 mph and the SES light started flashing. I went to an autoparts store and ran a scanner, P0300 which is "random cylinder misfire".

I have new wires and TR6 plugs gapped at .035 and are brand new. It was running rich a few days ago, but I took them out, cleaned them and regapped them so they arent the issue.

Whats up with that? Should I try new coil packs? New ICM? Have the timing retared?

FYI, I'm only running a 50 hp shot, N20 pressure was 950psi and fuel press was 80psi. I had 1/4 tank of 91 and 3/4 tank of 92 octane fuel with octane booster fuel additive.

[97rs4life]

Re: Ran the spray today...

1.) do not use octane booster additives with nitrous. Ruins solenoids in the long run

2.) it might be just a spark plug or wire that needs changing, otherwise try switching the coil packs around and see if the misfire goes to another cylinder. If it does, then you need a coil pack.

3.) Good to hear the nitrous is working good and everything was wired up good.

[Shodown]

Re: Ran the spray today...

Only problem with swithcing around the coil packs is that its random multiple misfire and doesnt say which cylinder it is. I may put new ones on anyhow.

Thanks for the info on the octane booster, but does it really matter on a dry kit? I dont think I will use anymore, but I am just curious.

Thanks man.

[Kidcamaro98]

Re: Ran the spray today...

well are u happy with everything besides the misfire??? i had a 55 shot wired up in mine but i ended up selling it before i used it :( because i went to a turbo...everything was wired too so i never got to get the feel of nitrous

[97rs4life]

Re: Ran the spray today...

oh yea, duh! you don't have a fuel soleniod running fuel to the nozzle.

I use a scanner of my dads and it tells me what cyl. it is when there is a misfire. Maybe ask around if someone around you has one you can borrow

[lvemy3100]

Re: Ran the spray today...

no need to get the scanner.. random misfires means just what it says .... its just a side effect from running the juice


same thing happens when you throw in a cam..

maybe retard a little timing or add fuel in the rpm/tp range where your no2 is activated (if you have the means to) or run a smaller shot

imo everything is fine if you can do either one of the above and you should be running straight 92 or 93 not a mix of 91 and 92 and also no additive (the stuff is junk when used with No2 )

hth

[Shodown]

Re: Ran the spray today...

Cool, thanks guys. I will give it a try again and see if maybe it was just a fluke and if it happens again I will wait until I get it dyno tuned and see what the tuner says. I am having it tuned next week.

[Shodown]

Re: Ran the spray today...

Just ran it again. It sprayed and ran much better than the last run. It still misfired at topend but didnt throw any codes. I am going to pull the plugs tomorrow and clean them...again (I'm gettin good at that) then try it out again and she what she does.

[ssms5411]

Re: Ran the spray today...

Nice, how was hard was the wiring? I'm going to do mine tomorrow, if I can ever figure out the msd window switch.

[Shirl]

Re: Ran the spray today...

Good news and bad news.

FYI, I'm only running a 50 hp shot, N20 pressure was 950psi and fuel press was 80psi. I had 1/4 tank of 91 and 3/4 tank of 92 octane fuel with octane booster fuel additive.

Running RICH. Check the plugs and see if they're black. 80psi is too high for such a small shot.

[Shodown]

Re: Ran the spray today...

Thanks Shirl. I am pulling all the plugs tomorrow and cleaning them. I wont spray again until I get it dyno tuned and everything adjusted.

Now all I have to do is be patient...this is going to be tough. :cry:

[andrew.brandon]

Re: Ran the spray today...

I was gonna say, 80 PSI is double the fuel pressure of stock. correct me if I am wrong but if you double the pressure its like you go from 17 pound injectors to 34 pound injectors.

[andrew.brandon]

Re: Ran the spray today...

Thanks Shirl. I am pulling all the plugs tomorrow and cleaning them. I wont spray again until I get it dyno tuned and everything adjusted.

Now all I have to do is be patient...this is going to be tough. :cry:

and up the shot. witha good tune and the fuel pressure regulator you should be able to run a 85-100 shot.

[lvemy3100]

Re: Ran the spray today...

and up the shot. witha good tune and the fuel pressure regulator you should be able to run a 85-100 shot.

agreed with a good tune, regulator, and pump 75-100 shot should be very easy to do

[Shodown]

Re: Ran the spray today...

and up the shot. witha good tune and the fuel pressure regulator you should be able to run a 85-100 shot.

Ya know, I was thinking the exact same thing, but I figured I was just daydreaming! I will clean up the plugs, but I am still not sure I want to run it until it has a good tune.

I think the fuel pressure is spiking so high because of the Walbro fuel pump. I didnt think it would go that high though, I figured the MAF would calibrate it to the computer better than that.