So Ive got dtec installed and im getting a p1080 or leank bank 1 code. My wire taps are soldered and all good. My car runs fine and all the dtec corrections work like they should but I will lean out randomly. Just cruising and all of a sudden I will go off the charts lean and the back to normal on my wideband. Ive got stage 2 injectors on stage 0 ecu. Also when ever shifting into 4th gear at wide open throttle my car will start missing for a few seconds even with knock retard at only 2-3 degrees and a/f ratios in the 10's. But if i roll on the throttle slowly I get no problems. I hit another blowout spot in 5th geaR also, a/f's again in the safe zone. Comments...suggestions?
So Ive got dtec installed and im getting a p1080 or leank bank 1 code. My wire taps are soldered and all good. My car runs fine and all the dtec corrections work like they should but I will lean out randomly. Just cruising and all of a sudden I will go off the charts lean and the back to normal on my wideband. Ive got stage 2 injectors on stage 0 ecu. Also when ever shifting into 4th gear at wide open throttle my car will start missing for a few seconds even with knock retard at only 2-3 degrees and a/f ratios in the 10's. But if i roll on the throttle slowly I get no problems. I hit another blowout spot in 5th geaR also, a/f's again in the safe zone. Comments...suggestions?
To my knowledge there is no solution yet for this problem.
You are not the first to complain of suddenly going lean and having lean stumbles.
TJ
__________________
In Memory of Steven "Nightshade" Lorenz
May you rest in peace.
6/11/1987-4/4/2006
^yup. i have been having similar issues for a couple months now, except i have not gotten any codes. i have tried many different fixes, including: new walbro, new o ring on factory fpr, new upstream o2 sensor, removed dtec from vehicle completely, swapped tps for known good one, swapped map sensor for known good one, swapped iac valve for known good one, check valve inline with rrfpr, tried 58psi fp static(no vac/boost ref), countless boost leak tests and i'm sure there are a couple other things i am missing. all with no success. i have spoken with many knowledgeable people on this forum, including a couple vendors, and no one really has any idea. i am currently trying to find a good shop with an o scope to try and figure this thing out.
if you make any progress, please update this thread. good luck.
So Ive got dtec installed and im getting a p1080 or leank bank 1 code. My wire taps are soldered and all good. My car runs fine and all the dtec corrections work like they should but I will lean out randomly. Just cruising and all of a sudden I will go off the charts lean and the back to normal on my wideband. Ive got stage 2 injectors on stage 0 ecu. Also when ever shifting into 4th gear at wide open throttle my car will start missing for a few seconds even with knock retard at only 2-3 degrees and a/f ratios in the 10's. But if i roll on the throttle slowly I get no problems. I hit another blowout spot in 5th geaR also, a/f's again in the safe zone. Comments...suggestions?
A spuratic and sudden "off the chart" Lean spike, that happens more frequently under load, is almost always caused by an ignition misfire.
This is not very intuative, as you would think a misfire would cause a Rich reading. Remmeber the wideband reads O2 content not fuel content. A misfire causes excessive amount of O2 in the exhaust stream.
The cause of the misfire is not so straight forward. Check your plugs and ohm your wires by shaking them while the multi-meter is connected. Dont assume that if the parts are new or "not that old" that they're any good. Leaky spark plug tube seals will also cause misfires. Check Magna-cores website for that tip and others.
Dave
__________________
Quote: Originally Posted by Bell Intercoolers
Regardless of the [Thermal] efficiency, if too much pressure is lost, then the intercooler is either useless or can actually decrease performance...Corky Bell
Last edited by duster360 : 10-19-2006 at 05:19 PM.
hmmmm, i will try yalls suggestions. I think im just gonna go stage 1 ECU and hope that solves it.
ok... good way to fix a problem, just throw more mods at the car and hope it fixes itself.
LOL..That seems to be the most common advice on this forum. EI: "If it doesn't run right you obviously haven't bought enough MODS!"(btw:I hate that word)
So Ive got dtec installed and im getting a p1080 or leank bank 1 code. My wire taps are soldered and all good. My car runs fine and all the dtec corrections work like they should but I will lean out randomly. Just cruising and all of a sudden I will go off the charts lean and the back to normal on my wideband. Ive got stage 2 injectors on stage 0 ecu. Also when ever shifting into 4th gear at wide open throttle my car will start missing for a few seconds even with knock retard at only 2-3 degrees and a/f ratios in the 10's. But if i roll on the throttle slowly I get no problems. I hit another blowout spot in 5th geaR also, a/f's again in the safe zone. Comments...suggestions?
A spuratic and sudden "off the chart" Lean spike, that happens more frequently under load, is almost always caused by an ignition misfire.
This is not very intuative, as you would think a misfire would cause a Rich reading. Remmeber the wideband reads O2 content not fuel content. A misfire causes excessive amount of O2 in the exhaust stream.
The cause of the misfire is not so straight forward. Check your plugs and ohm your wires by shaking them while the multi-meter is connected. Dont assume that if the parts are new or "not that old" that they're any good. Leaky spark plug tube seals will also cause misfires. Check Magna-cores website for that tip and others.
Dave
I would be very surprised if this was an ignition issue.
If it was, the car would go rich during the stumble, as the fuel would not be burning.
For more information, do a search on username TJ1376 for Lean stumble during closed loop operation.
This is a fuel delivery problem (to my best knowledge), and I still think its got something to do with the computer model in the NGC not causing injectors to fire. IE like a computer programming error inside the NGC. Stock cars have exhibited the same problems... I was just the first with a massive amount of diagnostic tools to figure out what was up.
So Ive got dtec installed and im getting a p1080 or leank bank 1 code. My wire taps are soldered and all good. My car runs fine and all the dtec corrections work like they should but I will lean out randomly. Just cruising and all of a sudden I will go off the charts lean and the back to normal on my wideband. Ive got stage 2 injectors on stage 0 ecu. Also when ever shifting into 4th gear at wide open throttle my car will start missing for a few seconds even with knock retard at only 2-3 degrees and a/f ratios in the 10's. But if i roll on the throttle slowly I get no problems. I hit another blowout spot in 5th geaR also, a/f's again in the safe zone. Comments...suggestions?
A spuratic and sudden "off the chart" Lean spike, that happens more frequently under load, is almost always caused by an ignition misfire.
This is not very intuative, as you would think a misfire would cause a Rich reading. Remmeber the wideband reads O2 content not fuel content. A misfire causes excessive amount of O2 in the exhaust stream.
The cause of the misfire is not so straight forward. Check your plugs and ohm your wires by shaking them while the multi-meter is connected. Dont assume that if the parts are new or "not that old" that they're any good. Leaky spark plug tube seals will also cause misfires. Check Magna-cores website for that tip and others.
Dave
I would be very surprised if this was an ignition issue.
If it was, the car would go rich during the stumble, as the fuel would not be burning.
For more information, do a search on username TJ1376 for Lean stumble during closed loop operation.
This is a fuel delivery problem (to my best knowledge), and I still think its got something to do with the computer model in the NGC not causing injectors to fire. IE like a computer programming error inside the NGC. Stock cars have exhibited the same problems... I was just the first with a massive amount of diagnostic tools to figure out what was up.
TJ
Misfire = LEAN spike NOT rich
Lets review what I already said
"A spuratic and sudden "off the chart" Lean spike, that happens more frequently under load, is almost always caused by an ignition misfire.
This is not very intuative, as you would think a misfire would cause a Rich reading. Remmember the wideband reads O2 content not fuel content. A misfire causes excessive amount of O2 in the exhaust stream."
The only proper way to test a fuel delivery is with a pressure guage. IF fuel pressure drops as RPM increases than its a delivery problem. If pressure is constant than there is NO possible way fuel volume is an issue.
Now if the injector's coil isn't energizing, thats a whole different deal. This would be nearly impossible without causing a few codes specifcally PO201-PO204. These codes only set if an inductance spike is seen by the pcm, ei:injector's coil fails to energize.
If you really wanted to be sure i'd put a scope on each injector circut and watch for a pulse to drop out. It should be very obvious,,but i seroius doubt its an injector problem.
Dave
Last edited by duster360 : 10-20-2006 at 03:29 PM.
"A spuratic and sudden "off the chart" Lean spike, that happens more frequently under load, is almost always caused by an ignition misfire.
This is not very intuative, as you would think a misfire would cause a Rich reading. Remmember the wideband reads O2 content not fuel content. A misfire causes excessive amount of O2 in the exhaust stream."
The only proper way to test a fuel delivery is with a pressure guage. IF fuel pressure drops as RPM increases than its a delivery problem. If pressure is constant than there is NO possible way fuel volume is an issue.
Now if the injector's coil isn't energizing, thats a whole different deal. This would be nearly impossible without causing a few codes specifcally PO201-PO204. These codes only set if an inductance spike is seen by the pcm, ei:injector's coil fails to energize.
If you really wanted to be sure i'd put a scope on each injector circut and watch for a pulse to drop out. It should be very obvious,,but i seroius doubt its an injector problem.
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strange problem, help me out...
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