Stage II TT CEL Help!

VQStryker · 04-26-2012, 09:16 PM

Quote:

Originally Posted by elliotty

Well it happened again. Car bogged down and cut off. No CEL this time. I looked at the data log and one Bank 1 sensor is a 1.xx volts while Bank 2 is 4.xx. Seems like the MAF is acting up.

bad sensor like what Sam said. Replace bank 2 (driver side) MAF sensor and you'll be gtg

Or replace them both with these MAF sensors:

UpRev MAF GT

^^^not nessesary, you can get your OEM MAF sensor at Nissan but just another option if you want to do both sensors.

elliotty · 04-26-2012, 09:28 PM

At idle, both MAF sensors are reading .82. Once I get on the throttle and start to build boost is when the engine hits a wall and cuts out. At this point on the data log, the two sensors are reading very different from each other. Could it be that I have a big boost leak? I have included a screenshot of the two MAF Volt charts (you can see the difference). At one point, Bank 1 is reading 3.96v while Bank 2 is reading 1.27v. It is hard to see in the picture, but the Red and Green lines are the two MAF Volt plots.

VQStryker · 04-26-2012, 10:27 PM

Quote:

Originally Posted by elliotty

At idle, both MAF sensors are reading .82. Once I get on the throttle and start to build boost is when the engine hits a wall and cuts out. At this point on the data log, the two sensors are reading very different from each other. Could it be that I have a big boost leak? I have included a screenshot of the two MAF Volt charts (you can see the difference). At one point, Bank 1 is reading 3.96v while Bank 2 is reading 1.27v. It is hard to see in the picture, but the Red and Green lines are the two MAF Volt plots.

ill go check for you

VQStryker · 04-26-2012, 10:41 PM

so im in my driveway and did some quick, easy accelerations and you may have a boost leak or a vacuum leak. do you have a boost gauge or controller and have you tried the throttle body cleaner trick I told you? Also, do you have the MAF cleaner?

Im getting almost even voltage to each MAF in both banks and a lot of wheel spin

. I need new rear tires

elliotty · 04-27-2012, 08:22 AM

Quote:

Originally Posted by VQStryker

so im in my driveway and did some quick, easy accelerations and you may have a boost leak or a vacuum leak. do you have a boost gauge or controller and have you tried the throttle body cleaner trick I told you? Also, do you have the MAF cleaner?

Im getting almost even voltage to each MAF in both banks and a lot of wheel spin

. I need new rear tires

Thanks for doing your testing! I do have a boost gauge and boost controller tapped into the vacuum lines going to the waste gates. I have not tried the throttle body cleaner trick, but I did do a boost leak test a couple weeks ago and didn't find any. I will have to pick up some MAF cleaner and throttle body cleaner and poke around a bit.

How high do you see your MAF voltages when you are accelerating? Do they ever get as high as 4 volts? It seems like the one sensor could just be acting up.

Thanks again!

VQStryker · 04-27-2012, 08:34 AM

I stopped a little before 4,000rpm and was seeing 3.xx volts so im not really sure.

Also:

check your waste gate lines, BOV line, and all fitting to make sure they are still connected and no holes or anything of that nature are present in the lines.

This is one of those things where I wish the person was closer so I could just have them come over and help them finnd the problem. I really hope you find whats causing this and lmk if you need to know where the fittings are that you sould check.

elliotty · 04-27-2012, 08:53 AM

Quote:

Originally Posted by VQStryker

I stopped a little before 4,000rpm and was seeing 3.xx volts so im not really sure.

Also:

check your waste gate lines, BOV line, and all fitting to make sure they are still connected and no holes or anything of that nature are present in the lines.

This is one of those things where I wish the person was closer so I could just have them come over and help them finnd the problem. I really hope you find whats causing this and lmk if you need to know where the fittings are that you sould check.

Thanks for the input. I will check all the lines and fittings. Luckily I know where they are from the install haha. Otherwise, I'd be searching forever. I'll keep the thread updated!

elliotty · 04-27-2012, 05:38 PM

Well I took the MAF sensor out and it was wet. Guess water got in the system somehow. Any suggestions on getting everything dry? I guess I will pull the bumper and intercooler and check things out. I am guessing there is water in the intercooler.

SAM@GTM · 04-27-2012, 05:49 PM

Quote:

Originally Posted by SAM@GTM

P0103 Mass or Volume Air Flow Circuit High Input

I think your MAF sensor got wet especially if it was raining hard like you said in the email, clear the codes and look at both MAF voltages to see if they are even voltage wise. you Should see around.8 to .9 volt at idle . Rev the engine and see if the voltage is increasing smoothly. If all that is good then i think you got lucky and the sensor did not get damaged.

If the sensor got wet then there is a possibility that you might have still some water left in the intercooler, You should check and clean as needed .

Hope this help .

Sam

Quote:

Originally Posted by elliotty

Well I took the MAF sensor out and it was wet. Guess water got in the system somehow. Any suggestions on getting everything dry? I guess I will pull the bumper and intercooler and check things out. I am guessing there is water in the intercooler.

Just remove the intercooler and make sure it is dry and you should be good to go. Hopefully you got lucky with the sensor .

Sam

VQStryker · 04-27-2012, 06:00 PM

Quote:

Originally Posted by elliotty

Well I took the MAF sensor out and it was wet. Guess water got in the system somehow. Any suggestions on getting everything dry? I guess I will pull the bumper and intercooler and check things out. I am guessing there is water in the intercooler.

You should have pulled that a long time ago when I mentioned dirty MAF but I hope it won't need replaced. Carefull with the MAF when cleaning/drying it, very sensative. I would just let it air try in a clean area. After it's dry, use MAF cleaner on it.

Im surprised water go into the system, I have driven in some bad wheather and I havent had that yet.... :/

elliotty · 04-27-2012, 06:23 PM

Quote:

Originally Posted by VQStryker

You should have pulled that a long time ago when I mentioned dirty MAF but I hope it won't need replaced. Carefull with the MAF when cleaning/drying it, very sensative. I would just let it air try in a clean area. After it's dry, use MAF cleaner on it.

Im surprised water go into the system, I have driven in some bad wheather and I havent had that yet.... :/

Yeah I should have checked sooner, but haven't had time. I haven't been driving the car. I'll pull the intercooler and make sure everything is dry. I'm pretty surprised water got in as well. I've driven in the rain on other occasions without issue. Thanks again for the help.

Sam - thank you as well. Helpful as always!

VQStryker · 04-27-2012, 06:32 PM

Good luck fitting it in the dryer

Get that thing back on the road!!

elliotty · 04-28-2012, 02:40 PM

Well I pulled the intercooler and it was full of water. Probably close to a gallon. It looks like the water was dripping in through the passenger side air filter and collecting in the charge piping. I really don't want this to happen every time the car sits in the rain. I am thinking about fabricating some sort of drip shield for that filter. Any thoughts?

Dembflyr · 04-28-2012, 03:36 PM

Quote:

Originally Posted by elliotty

Well I pulled the intercooler and it was full of water. Probably close to a gallon. It looks like the water was dripping in through the passenger side air filter and collecting in the charge piping. I really don't want this to happen every time the car sits in the rain. I am thinking about fabricating some sort of drip shield for that filter. Any thoughts?

A GALLON?!!??

elliotty · 04-28-2012, 03:43 PM

Quote:

Originally Posted by Dembflyr

A GALLON?!!??

It was A LOT. I can't believe I didn't hydro lock. When I unbolted the clamps on the charge pipes and pulled them off the lower sides of the intercooler, water poured out. I took a bunch of the pipes off and ran air through the system to dry it.

I really don't want this to happen again!

04-26-2012, 10:41 PM	#19 (permalink)
VQStryker Track Member Join Date: Jul 2011 Location: Texas Age: 36 Posts: 659 Drives: :( Rep Power: 15	so im in my driveway and did some quick, easy accelerations and you may have a boost leak or a vacuum leak. do you have a boost gauge or controller and have you tried the throttle body cleaner trick I told you? Also, do you have the MAF cleaner? Im getting almost even voltage to each MAF in both banks and a lot of wheel spin . I need new rear tires __________________ SOLD- Stryker TT super sleeper (12.35 @ 121mph) no gripZ Chance build http://www.the370z.com/members-370z-...ml#post3001583 No Z Last edited by VQStryker; 04-26-2012 at 10:49 PM.

04-27-2012, 08:34 AM	#21 (permalink)
VQStryker Track Member Join Date: Jul 2011 Location: Texas Age: 36 Posts: 659 Drives: :( Rep Power: 15	I stopped a little before 4,000rpm and was seeing 3.xx volts so im not really sure. Also: check your waste gate lines, BOV line, and all fitting to make sure they are still connected and no holes or anything of that nature are present in the lines. This is one of those things where I wish the person was closer so I could just have them come over and help them finnd the problem. I really hope you find whats causing this and lmk if you need to know where the fittings are that you sould check. __________________ SOLD- Stryker TT super sleeper (12.35 @ 121mph) no gripZ Chance build http://www.the370z.com/members-370z-...ml#post3001583 No Z

04-27-2012, 06:32 PM	#27 (permalink)
VQStryker Track Member Join Date: Jul 2011 Location: Texas Age: 36 Posts: 659 Drives: :( Rep Power: 15	Good luck fitting it in the dryer Get that thing back on the road!! __________________ SOLD- Stryker TT super sleeper (12.35 @ 121mph) no gripZ Chance build http://www.the370z.com/members-370z-...ml#post3001583 No Z

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04-27-2012, 05:38 PM	#23 (permalink)
elliotty Enthusiast Member Join Date: Sep 2010 Location: Charlotte, NC Posts: 355 Drives: '10 PG Nismo TT Rep Power: 15	Well I took the MAF sensor out and it was wet. Guess water got in the system somehow. Any suggestions on getting everything dry? I guess I will pull the bumper and intercooler and check things out. I am guessing there is water in the intercooler.

04-28-2012, 02:40 PM	#28 (permalink)
elliotty Enthusiast Member Join Date: Sep 2010 Location: Charlotte, NC Posts: 355 Drives: '10 PG Nismo TT Rep Power: 15	Well I pulled the intercooler and it was full of water. Probably close to a gallon. It looks like the water was dripping in through the passenger side air filter and collecting in the charge piping. I really don't want this to happen every time the car sits in the rain. I am thinking about fabricating some sort of drip shield for that filter. Any thoughts?