Hey whats going on, Iv been tuning the car and had everything pretty good, with out the nitrious, I put the tune in for the 42.5 injectors and scaled the maf .94 which helped alot, I got my tank filled and hit the button and car misfires like a bitch and kicks out, the only thing that i noticed is when im on the nos, the 02mv go way low like 45-65, what is causing this mishap. I posted the scan and my tune, thanks for any help.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
Do you think I have a vac leak somewhere causing the extremely low 02mv.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
Did you spray every time you went WOT in that scan? Around frame 5778 was the only time it looked like you went way lean at 100% TP, the other times you were way rich (O2's in the 1000 mv range).
I wouldn't think a vacuum leak, that would show up more at idle than at WOT. Are you sure the tank is full and you're not getting air in the line (tank tilted right)? It almost looks like you're spraying air.
-Eddie
1998 GTP - 3.4 [3.2] [3.0] MPS - custom CAI - F.1 Ram Air hood - XP Cam - Ported Heads - 1.84/1.60 Si valves - 1.6 HS Roller Rockers - 72mm Ported TB - LQ4 MAF - 42.5# Lucas Injectors - Pacesetters
1/4 PB - 13.025 @ 106.81 MPH w/ 2.069 60'
2021 Chevrolet Colorado 2.8 Baby Duramax
I sprayed a few times, where the 02mv are at like 55mv, and when i didnt spray it was 1000 or so, when it goes that low is that lean, I have no idea why this is doing it all of sudden, iv had the nos in my car for a few months with no problems, would a cracked vacume line or leak have an issuse when using the nos. thanks for the help.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
I would check the N2O line and tank. I don't think it's actually getting any N2O, just air.
Did this just start the last time you had the tank filled?I got my tank filled and hit the button and car misfires like a bitch and kicks out
-Eddie
1998 GTP - 3.4 [3.2] [3.0] MPS - custom CAI - F.1 Ram Air hood - XP Cam - Ported Heads - 1.84/1.60 Si valves - 1.6 HS Roller Rockers - 72mm Ported TB - LQ4 MAF - 42.5# Lucas Injectors - Pacesetters
1/4 PB - 13.025 @ 106.81 MPH w/ 2.069 60'
2021 Chevrolet Colorado 2.8 Baby Duramax
Ya I had the problem after I got it filled, but the thing is when i hit the button, the T under the supercharger snout blew off, which i found out, is there a blockage somewhere.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
Shouldn't be, air/vacuum doesn't flow through this hose. By design I guess you could say there is a blockage, but there is suppose to be. That is a vac hose that goes to the MAP sensor, FPR, and boost bypass solenoid. Check the rubber part of the TEE to be sure it isn't split and fits the nipple tightly. It shouldn't have blown off unless it was loose or broken, or ther was too much pressure in the intake.
I just looked at your scan again and saw something very strange I didn't notice last night. The MAP sensor on your scan was showing 200 kpa, is this normal? With BARO at 94, that's almost 15 1/2 psi on a 3.2 pulley. Also noticed your BARO changes, sometimes it's 102 kPa which would put your boost closer to 14 psi.
Also, looking at the scan again it doesn't look like the hose being disconnected was an issue. If it were, the MAP sensor would read BARO all the time and not change.
You have a severe KR event at around frame 4230. After that every time you hit WOT with any RPM you were maxing the MAP sensor (200 kpa or very close) Before that you were maxing closer to 180-185. I think somthing might have happened then. Maybe the converter melted and caused an exhaust restriction. I have reservations about saying that based on the rst of the scan, but something happened.
Can you check the N2O tank pressure?
Hey! What are the chances you blew the orfice out of the N2O nozzel? That could explain everything as far as the cutting out, high manifold pressure and low O2's, and the bad KR event in the scan could have been the orfice passing through the engine (ouch!). That would be the first thing I would check.
-Eddie
1998 GTP - 3.4 [3.2] [3.0] MPS - custom CAI - F.1 Ram Air hood - XP Cam - Ported Heads - 1.84/1.60 Si valves - 1.6 HS Roller Rockers - 72mm Ported TB - LQ4 MAF - 42.5# Lucas Injectors - Pacesetters
1/4 PB - 13.025 @ 106.81 MPH w/ 2.069 60'
2021 Chevrolet Colorado 2.8 Baby Duramax
I did get a guage for the nos, its mounted on the tank around 6 on the guage. For the boost i was getting 11-12psi and when i hit the button it would go around 15psi which it has been doing for a while.and hasnt giving me any problems, But I have no idea what happened the other day why it surges like there is a fuel cut or something when i hit the nos, causing the low 02s, could i have a bad tank of nos, I checked for vac leaks with carb cleaner nothing, and ive heard of something called spark blow out, may i will check the gap on the plugs.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
I took it for a run to night real quick, nos was not on, car still feels as though it surging, its pissing me off not knowing what it is.
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
In first post ed, you said something about the tank being tilted?
PB... [email protected]'@1.807 no nos.
Zzp 1.9 rockers,42.5 lucus injectors,poly motor mounts 3.2", custom K/N FWI, Autolite 104s, 180*t-stat, DHP PCM, Pacesetter headers, 3" down pipe, highflow cat, 3'' exhaust to bullet mufflers. Zex dry kit with 75 shot, thrasher throttlebody spacer, Stage 2 dynotech race tranny, 3.29s, 15/16s chain, hardened imput shaft, 3000 pro torque converter.
Just asking if the tank is mounted backwards.
Let me know what the plugs look like, that is a definate possibility.
-Eddie
1998 GTP - 3.4 [3.2] [3.0] MPS - custom CAI - F.1 Ram Air hood - XP Cam - Ported Heads - 1.84/1.60 Si valves - 1.6 HS Roller Rockers - 72mm Ported TB - LQ4 MAF - 42.5# Lucas Injectors - Pacesetters
1/4 PB - 13.025 @ 106.81 MPH w/ 2.069 60'
2021 Chevrolet Colorado 2.8 Baby Duramax
http://www.zex.com/Base/Instructions/ZEX109.pdf
Scroll down to page 6. Will give you an idea as to what is going on in the tank itself.
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