Nearly blew her up... thank goodness for wideband A/F sensors

Reply Subscribe

Thread Tools

Search this Thread

09-28-2006, 04:23 PM

StupidTodd

2nd Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 408

Nearly blew her up... thank goodness for wideband A/F sensors

Went for another dyno session to complete my nitrous tune.

Hit the juice and pulled a 302 tq/240 hp with a 75 shot. Something was wrong.

Checked the dyno chart, and my A/F was F####D up. It was bouncing from like 14:1-16:1.

The fuel solenoid was firing, but something is clogged, or maybe it's a bad solenoid, or who knows.

Thank goodness this all happened on a dyno, and we were able to stop before it damaged anything.

Now, I have to find time to fix it and schedule another dyno session. fun fun

09-28-2006, 05:24 PM

StupidTodd

2nd Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 408

RE: Nearly blew her up... thank goodness for wideband A/F sensors

Well, at least it was a quick fix.

Originally, I had 100 shot jets installed. My tuner didn't want to start with 100's, so I bought a set of 75s at Jegs and swapped them out really quick.

The fuel jet was clogged.

A quick shot of break cleaner, put the jet back in and the fuel fires just fine now.

Always remember to check your jets and make sure they're not clogged.

09-28-2006, 06:41 PM

scrming

5th Gear Member

Join Date: Sep 2005

Location:

Posts: 2,750

RE: Nearly blew her up... thank goodness for wideband A/F sensors

That is one of the scary things about N20.. you are at the mercy of the nozzle... Glad you caught in time! We had that happen once on the dyno too...

09-28-2006, 09:53 PM

flapjack

I ♥ Acer

Join Date: Mar 2005

Location: Boston, MA

Posts: 614

RE: Nearly blew her up... thank goodness for wideband A/F sensors

Man... nitrous still scares the hell outta me.

@scrming

Remember the debate we had way back in the day? I'd be a liar if I said I never thought about adding a small shot to my FI setups, but it still scares me too much...

09-28-2006, 10:01 PM

scrming

5th Gear Member

Join Date: Sep 2005

Location:

Posts: 2,750

RE: Nearly blew her up... thank goodness for wideband A/F sensors

Quote:

ORIGINAL: flapjack

Man... nitrous still scares the hell outta me.

@scrming

Remember the debate we had way back in the day? I'd be a liar if I said I never thought about adding a small shot to my FI setups, but it still scares me too much...

Yeah... I hear you... on that last run on April 15th when i broke the piston... well, the piston broke right off the line... you can see it in the video... (the nose drops like a ROCK!)... anyways when I got back to the pits the C&L was absolutely ICE COLD!!! Now I've have felt the intake after a run before and it has ALWAYS been warm... this just about had FROST on it it was so COLD!!! So that tells me the N20 Solenoid was stuck open! Now I realize it didn't cause the failure but dang it was enough to really put me off ever using Nitrous again... Just to much that can go wrong...

09-28-2006, 10:09 PM

flapjack

I ♥ Acer

Join Date: Mar 2005

Location: Boston, MA

Posts: 614

RE: Nearly blew her up... thank goodness for wideband A/F sensors

Well, it sucks that you had to bust something... but you still pushed N20 to it's limits on our stock engine. Those of us who still want to mess with it can learn a lot from your experiences... so your engine failure wasn't for naught.

Now that you're in the F/I fold.... we'll have to escalate the arms race.

Check your PM.