Lean Spot At ~2400 RPM...What the?
#381
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Hey guys, I'm having a issue where I have a lean spot. We were getting ready to tune and while on the dyno at 2500rpm bank 2 is very lean, bank 1 is fine. While idle or driving under normal load it's fine. It only does it under load. I have sent injectors to DW to have a flow check and all was good.
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
#383
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Hey guys, I'm having a issue where I have a lean spot. We were getting ready to tune and while on the dyno at 2500rpm bank 2 is very lean, bank 1 is fine. While idle or driving under normal load it's fine. It only does it under load. I have sent injectors to DW to have a flow check and all was good.
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
i posted in your thread. Your condition isn't anything close to what the damper problem we all have is. I think the first pages here you can read and everyone has the exact same problems and it's nothing like yours.
dampers won't cause bank to bank differences either....the banks are linked with the fuel system.
i'm telling you IT'S AN EXHAUST LEAK. I'd put money on it. You have a lean reading with a car that doesn't drive like it's lean. It's a false a/f reading caused by exhaust leak. No way will a car run smooth at 18:1 actual a/f.
#384
Vendor - Former Vendor
iTrader: (7)
^^^^ We will be checking everything. I brought up the fuel dampers specifically cause of the RPM range and the fact they are removed. They don't 100% match his condition, but then again we haven't seen the car yet. An exhaust leak would have to be pretty big to cause the condition he is having, like audibly big. If it is indeed an exhaust leak and that is the cause, I would be a little disappointed that a shop had it for months and didn't find it....
#385
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^^^^ We will be checking everything. I brought up the fuel dampers specifically cause of the RPM range and the fact they are removed. They don't 100% match his condition, but then again we haven't seen the car yet. An exhaust leak would have to be pretty big to cause the condition he is having, like audibly big. If it is indeed an exhaust leak and that is the cause, I would be a little disappointed that a shop had it for months and didn't find it....
And ya, you'd be disappointed that a shop missed that but would you honestly be surprised? I could probably count on 1 hand the amount of shops i would let touch my car. It's not just for our cars either. I have a lot of domestic friends that have tons of trouble with ******** shops that cut corners.
#386
I also do not think it is a damper problem, simply because it happens under load which is a very very different scenario than what I was experiencing.
I never had any problems under moderate to high loads.
I never had any problems under moderate to high loads.
Hey guys, I'm having a issue where I have a lean spot. We were getting ready to tune and while on the dyno at 2500rpm bank 2 is very lean, bank 1 is fine. While idle or driving under normal load it's fine. It only does it under load. I have sent injectors to DW to have a flow check and all was good.
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
I have started a thread to see if I could get some help and some guys have been helpful with there suggesstions. We will be doing a smoke test to test for exhaust leak. I was told by a shop today that the greddy manifolds are known to crack. ( there new 1700 mile on them) so I'm kinda like hmmm idk.
I'm lost!!!! I'm tuning in up-rev. Everything seems to be running ok until under load and thats when bank 2 goes lean. We used a new w/b sensor fro the dyno and even swaped them so we would know it's not a bad sensor. Everthing kept reading the same. I talked to Vince at RT Tuning today and he asked me if i were running a return with aftermarket rail and I told him yes. When I explained this to him he said it's a good chance it'sthe dampners. The aftermarket one eliminate the dampners. Does anyone have any ideas or suggesstion? If I have left anything out or you need more info let me know. I'm sure I left somthings out. My brain is so rattled with whats going on!!! thanks guys!!!!!
#387
But in this case yes, I agree with you that it is not likely a damper problem, or at least not the same problem I had.
#388
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Not necessarily true. Recall that I fixed the problem on only bank 2 at first, and had to add a third damper (on the bank 1 rail) to fix the problem on bank 1.
But in this case yes, I agree with you that it is not likely a damper problem, or at least not the same problem I had.
But in this case yes, I agree with you that it is not likely a damper problem, or at least not the same problem I had.
but he has zero dampers not just a damper in 1 rail and not the other.
#390
CJ Motorsports
iTrader: (21)
we havent been shipping them lately, waiting for a backorder on the washers to clear. one of these days.
unfortunately our suppliers are unable to keep up on even the most simple and cheap components. we have tried about a dozen alternatives to these washers but none of them fit well enough for our liking, so for now we are waiting it out and focusing our attention on other things.
unfortunately our suppliers are unable to keep up on even the most simple and cheap components. we have tried about a dozen alternatives to these washers but none of them fit well enough for our liking, so for now we are waiting it out and focusing our attention on other things.
#391
CJ Motorsports
iTrader: (21)
i just sent a rude email to get me at least 50 before the end of the week and another 500 next week. ill let you know if that works out lol, cause now you reminded me and its getting me all worked up about it... i cant stand when they fail to get me the stupidest thing
#393
we havent been shipping them lately, waiting for a backorder on the washers to clear. one of these days.
unfortunately our suppliers are unable to keep up on even the most simple and cheap components. we have tried about a dozen alternatives to these washers but none of them fit well enough for our liking, so for now we are waiting it out and focusing our attention on other things.
unfortunately our suppliers are unable to keep up on even the most simple and cheap components. we have tried about a dozen alternatives to these washers but none of them fit well enough for our liking, so for now we are waiting it out and focusing our attention on other things.
Have you tried Thompkins? Or are they the ones letting you down?
#398
CJ Motorsports
iTrader: (21)
Two full batches of the damper port rails sold out... more in the machines. Only sold 3 sets of the standard rails ever since they came out.
Stage 0 kits have been updated to reintroduce the OEM damper as MX had done.
Better late than never. We have been updating the programming on all of our parts in their most recent batches so its was this parts turn from an update. This fitting would now also be a really good way to tap in to the stock fuel lines for nitrous fuel supply, but nitrous isnt very popular in the VQ world anyway.
Ignore the extra long bolts, I grabbed 10mm longer than needed, proper ones on the way... also ignore the quick disconnect outlet port on the damper, I added that for another project and its the only damper I had laying around for a picture.
Stage 0 kits have been updated to reintroduce the OEM damper as MX had done.
Better late than never. We have been updating the programming on all of our parts in their most recent batches so its was this parts turn from an update. This fitting would now also be a really good way to tap in to the stock fuel lines for nitrous fuel supply, but nitrous isnt very popular in the VQ world anyway.
Ignore the extra long bolts, I grabbed 10mm longer than needed, proper ones on the way... also ignore the quick disconnect outlet port on the damper, I added that for another project and its the only damper I had laying around for a picture.