Check engine codes P1071, P1074

[Gonein60]

The next day after installing JLT CAI, 82mm pulley, and VMP 91 octane tune my car tripped a check engine light with BANK 1 and 2 running lean. I called VMP, and Bobby said Justin will have to send me another tune that will fix Check engine light problem.

The thing that sucks is now i gotta pay my Dyno tuner another $125 to load the tune and dyno car again to make sure the new tune Justin sent me is producing the correct power, and to check the Air/Fuel, timing, and so forth.

Since this wasn't my fault, I think it would be good business for Justin to reimburse me for the second dyno session. Justin should of sent me correct tune to begin with.

I checked all connections at Throttle Body and Air filter clamps, and everything is good and snug.

Have any of you other guys run into this problem.

Steve

[XTRM5XR]

seeing this makes me want to stay around the magical 550 rwhp range....so what its not as much as a GT500 but still 55 rwhp more than the LT1 Camaro.......and its almost 100 more RWHP more than i had with my 5xr...

[walker2t]

you don't have to re-dyno just load the tune yourself and data Log files to Justin he will then know if correct or not...

[Capt Nemo]

You bought a mail order tune and want dyno run reimbursement? Good luck with that

[cmg427]

Justin is not going to pay your dyno fees. As Walker said you should datalog first and got everything right. Then hop on the dyno if you want. And $125 to check your tune is a ripoff.

[Pentalab]

The next day after installing JLT CAI, 82mm pulley, and VMP 91 octane tune my car tripped a check engine light with BANK 1 and 2 running lean. I called VMP, and Bobby said Justin will have to send me another tune that will fix Check engine light problem.

The thing that sucks is now i gotta pay my Dyno tuner another $125 to load the tune and dyno car again to make sure the new tune Justin sent me is producing the correct power, and to check the Air/Fuel, timing, and so forth.

Since this wasn't my fault, I think it would be good business for Justin to reimburse me for the second dyno session. Justin should of sent me correct tune to begin with.

I checked all connections at Throttle Body and Air filter clamps, and everything is good and snug.

Have any of you other guys run into this problem.

Steve

Yeah, I did just last week. I ordered a VMP custom 94 octane tune + new SCT-X3 tuner from the VMP site. (for my 2010 GT + M90 blower)
The new tune was already in the SCT-X3 ! (under "custom tune"). I just plugged the SCT-X3 into the OBD jack, pressed a few buttons, brought up "custom tune"... then "load" then sat back and drank coffee and smoked a butt...while watching the 0-100% bar on the X3 slowly progress from 0-100%. It 1st uploads the existing Roush tune into the X3....which takes 3 mins. Then it reconfigures the memory on the car's ECU (another 20 secs). Then it begins to download the new custom tune into the car's ECU. (3 mins) Entire process start to finish was 7 mins.

When all done, unplug the X3. Then start the car..and go for a test drive. Yikes, the increased throttle response and hp was something else.
OK, one minor bug. My AC doesn't crank out cold air, just recirculates cabin air. Walker2T went through the same issue with his 2010 GT + VMP-500 tune. Walker2T had his Ford dealer trying to fix the AC problem..which of course they couldn't. Walker2T then re-installs his old JDM tune back into the car.. and presto, his AC now works ! Since I was aware of his AC issue, I simply e-mailed Justin...who promptly sent me a new revised tune, with the AC fix. New revised tune that came via e-mail was then downloaded onto the X3. X3 plugged into car's OBD jack...and new revised tune fed into the ECU. Ok, my AC now works. Next up, I data log with the X3..and send the data log to Justin, who reviews it..and if required, makes minor tweaks.....and if tweaks are done... he then e-mails me yet another revised tune. I load that into the ECU. Then data log again. He usually nails it the 1st time around.

You folks with the 2011-2013 cars are lucky ! You already have TWO wide band AFR O2 sensors built in... one per each exhaust (one per bank).
You can read your AFR right from the X3. You can also see your AFR at a glance, at all times, with a single aeroforce gauge. The left-right bank AFR info is on the car's ECU at all times. ..(plus a ton of other stuff). For us 05-10 owner's.... we have to get a bung welded (pre-cat) into one of the two exhausts. Then the Bocsh LSU4.9 sensor is screwed into the threaded bung..and ultimately cabled into one of the two aux input's on the aeroforce gauge.

A single Aeroforce gauge will read 2 lines of text. (any 2 of 34 items from the ecu). On any 2011-2013 car, a single gauge will read, and display BOTH of your AFR sensors..simultaneously. The aeroforce just plugs into the cars OBD jack. You don't even need to mount the aeroforce gauge into a pod either. just leave it in the box it comes in... and plug the provided 9' long cable into the back of the gauge. Other end of same cable plugs into OBD jack. OBD jack powers the gauge. ( I have 3 x aeroforce gauges plugged into my OBD jack).

Your tuner doesn't need to be involved with any of this process.....start to finish. (except maybe install the JLT CAI + smaller SC pulley and new belt).

It sounds more complicated than it actually is. You don't need a tuner to read your AFR... that info is already there. You don't need the tuner to load the initial tune, nor data log and send results to VMP, nor load any revised tunes.

The only thing you might need the tuner for is to dyno the car.... after you have gone the requisite .... "go arounds" with VMP via e-mail. IE: get it all sorted out 1st...then dyno...dead last. If you added header's or any other tweaks, Justin would have to tune for that as well.

Even with this new tune he just sent you, you will have to load it into the ecu...and you will still have to data log this new revised tune. Let Justin review the logs..make any tweaks, then reload a 2nd revised tune if required. He will probably nail it in the tune you have coming soon via e-mail. He will want you to datalog it 1st though.

BTW... do you get the lean condition in NA mode, just cruising around town...or did it trip when in blower mode. The X3 can be used to read the DTC (diagnostic trbl codes) and so can the aeroforce gauge. And both the X3 and gauge can also be used to clear any DTC's.

Hope this helps.

Jimbo

[Pentalab]

seeing this makes me want to stay around the magical 550 rwhp range....so what its not as much as a GT500 but still 55 rwhp more than the LT1 Camaro.......and its almost 100 more RWHP more than i had with my 5xr...

See my other post. I'm the only one here in town with a SCT-X3..and mine just arrived last week. Justin will have his afr issue fixed in 1 day flat.
JDM would do the exact same procedure as VMP. You folks are really making a mountain out of a mole hill. You don't need to take the car to the local dyno shop to read afr. You can read afr while driving to the grocery store. There is 2 x afrs to worry about.... the NA one..and the blower one. Aprx 14.3 for NA...and 11.7-11.9 for blower mode is ideal. So just floor it in 2nd gear..and glance over at the aeroforce gauge when taking the wife to the mall. When she yells at you.... just tell her you are taking... "some measurements". (tell the cops the same thing when they pull you over) BTW, I see both the aeroforce gauge and the X3 will also display HP on any 05-13 car. The aeroforce gauge will also allow you to calibrate the HP readings it puts out on the digital display. It works too. You can also program the aeroforce gauge to set off its red leds if AFR goes too high, too low. You can also record with it...and ditto with the X3.

Jimbo

[Gonein60]

Well, Justin never told me to Data Log it. I took it to my Dyno tuner to check if it was producing the power it was supposed to, plus make sure Air/Fuel and timing was ok.

My tuner didn't see anything wrong with the tune after he dyno'd it. He said to Data log it and then send it back to Justin, which is what I will do.

How do you Data Log it? Just go to Data log on SCT device and go from there?

Hopefully he dialed my second tune in.

[Gonein60]

Once Data logged, How do I transfer Data Log back to Justin. Do I just download Data Log info to computer and email it back to Justin?

[cmg427]

Sct hooked to car and laptop. Yes email back to Justin

[Gonein60]

Loaded revised and updated tune from Justin. 5.0 is fine now, and no more DTC's. Idles and drives perfect. I will get a couple dyno runs in, just to make sure timing and Air/Fuel are good, plus I wanna make sure it's still making the 580wheel.

Justin seems like a good guy. Still don't know why it was throwing lean codes on his 1st tune. Just asked him, so hopefully he will tell me.

Steve

582wheel, 505 TORQUE, all on California 91 Octane is incredible. Justin knows what he's doing. Plus coolant and head temps runs cooler now. He must of lowered fan temps and made engine more efficient by changing cam timing. Still only makes 10psi boost, even with smaller 82mm pulley.

Car is sick fast. Thinking I could run a 10.20 with slicks. I have 373 gears and manual trans.

[Pentalab]

Loaded revised and updated tune from Justin. 5.0 is fine now, and no more DTC's. Idles and drives perfect. I will get a couple dyno runs in, just to make sure timing and Air/Fuel are good, plus I wanna make sure it's still making the 580wheel.

Justin seems like a good guy. Still don't know why it was throwing lean codes on his 1st tune. Just asked him, so hopefully he will tell me.

Steve

582wheel, 505 TORQUE, all on California 91 Octane is incredible. Justin knows what he's doing. Plus coolant and head temps runs cooler now. He must of lowered fan temps and made engine more efficient by changing cam timing. Still only makes 10psi boost, even with smaller 82mm pulley.

Car is sick fast. Thinking I could run a 10.20 with slicks. I have 373 gears and manual trans.

Just cuz the car is not throwing codes and AF is good, doesn't mean you are out of the woods yet. Data log it anyway..and e-mail it to him... so he can verify and analyze his latest tune. He might not be 100% happy with it and want to tweak it a bit more. NOT thowing codes and a good AF is only part of the story. He will review data logs as part of the service..and encourages it. Then he has something to help him further refine his tunes. Its an ongoing process. You can bet that the next guy who orders the same kit as you did..will probably get a tune that is dead on the 1st time around. Congrats on the revised tune. 582rwhp on 91 octane is crazy power.

Jimbo

[DiMora]

There are instructions on how to datalog on VMP's website.

In short, you hook up your laptop and your SCT handheld tuner (you need a printer cable to hook the laptop to your X3).

Then you need to load a file that tells the software (which you need to download and install from SCT) which parameters you wish to log.

Then it is simply a matter of selecting "record", doing the driving Justin has requested, then e-mailing him the results, and he can tweak as appropriate.

I run a local custom dyno tune...$500 initial, and tweaks for added mods (longtubes) are ~$300 - $350. Justin's tunes are inexpensive by comparison.

[Gonein60]

Just cuz the car is not throwing codes and AF is good, doesn't mean you are out of the woods yet. Data log it anyway..and e-mail it to him... so he can verify and analyze his latest tune. He might not be 100% happy with it and want to tweak it a bit more. NOT thowing codes and a good AF is only part of the story. He will review data logs as part of the service..and encourages it. Then he has something to help him further refine his tunes. Its an ongoing process. You can bet that the next guy who orders the same kit as you did..will probably get a tune that is dead on the 1st time around. Congrats on the revised tune. 582rwhp on 91 octane is crazy power.

Jimbo

Thanks for advice, but I will have my Dyno Tech run the car a couple times again tomorrow to verify data.

[Gonein60]

Just cuz the car is not throwing codes and AF is good, doesn't mean you are out of the woods yet. Data log it anyway..and e-mail it to him... so he can verify and analyze his latest tune. He might not be 100% happy with it and want to tweak it a bit more. NOT thowing codes and a good AF is only part of the story. He will review data logs as part of the service..and encourages it. Then he has something to help him further refine his tunes. Its an ongoing process. You can bet that the next guy who orders the same kit as you did..will probably get a tune that is dead on the 1st time around. Congrats on the revised tune. 582rwhp on 91 octane is crazy power.

Jimbo

Wrong, I was never in the WOODS Jimbo. Justin never told me to data log anything. And he said this new tune is updated and took care of problem. Car drives perfect now, and makes 580wheel on 91 octane. Justin said most likely the Check engine light was tripped cause car may have been running slightly lean at IDLE, and computer had to add more fuel, and that's what tripped light.

First dyno with VMP initial tune showed perfect 12:1 air/fuel all the way to 7200rpm. Car still only makes 10lbs boost with smaller 82mm pulley.

I'm getting it dyno'd this week so I will verify power, timing, and Air/Fuel, which is probably still perfect.

I may have justin send me a 93 Octane tune also, and use that when I race. Probably make 610wheel with 93octane tune, or more.

[Gonein60]

Just cuz the car is not throwing codes and AF is good, doesn't mean you are out of the woods yet. Data log it anyway..and e-mail it to him... so he can verify and analyze his latest tune. He might not be 100% happy with it and want to tweak it a bit more. NOT thowing codes and a good AF is only part of the story. He will review data logs as part of the service..and encourages it. Then he has something to help him further refine his tunes. Its an ongoing process. You can bet that the next guy who orders the same kit as you did..will probably get a tune that is dead on the 1st time around. Congrats on the revised tune. 582rwhp on 91 octane is crazy power.

Jimbo

Jim, you're right man. After a week of running Justin's second revised tune, it's throwing a P0174 CODE(Bank 2 running lean). Justin requested DATALOG runs, so I sent them to him. Dyon showed 11.9-11.5 all the way to 7200rpm. Must be running lean down low at idle or part throttle.