Slow acceleration after intake and exhaust

Footloose301 · 11-10-2011, 07:31 PM

I removed both of those pieces of plastic on both of my 370's and never had issues with the MAF.

Methodical4u · 11-10-2011, 09:44 PM

Don't forget to check all those dumb little things like that the MAF is plugged back in and such... any other wire you see, follow it, check it for breaks, burns, obviously being unplugged, etc etc.

Will@Logic · 11-11-2011, 01:45 PM

Shouldn't happen. If anything you should feel a difference after putting the intakes in.

henry0844 · 11-11-2011, 08:56 PM

Quote:

Originally Posted by Will@Logic

Shouldn't happen. If anything you should feel a difference after putting the intakes in.

you think a tune is what I need? I'm going to look over everything tonight and try to find anything that could b out of the norm. I just want my z running tip top, I love my car.

Methodical4u · 11-11-2011, 09:53 PM

Quote:

Originally Posted by henry0844

you think a tune is what I need? I'm going to look over everything tonight and try to find anything that could b out of the norm. I just want my z running tip top, I love my car.

The tune would be needed after a while, but there is no reason why the car would not run much better with an intake and exhaust even without a tune.

henry0844 · 11-11-2011, 11:49 PM

Quote:

Originally Posted by Methodical4u

The tune would be needed after a while, but there is no reason why the car would not run much better with an intake and exhaust even without a tune.

agreed

henry0844 · 11-14-2011, 05:30 PM

well, I fiddled with the intake clamps and found a couple that didn't look like they were tight enough around the throttle body. so I tightened them up and moved them to get a better seal around the piping. car seems to b driving quite a bit better. I will reserve judgment until I put a few more miles on her but this may have been the problem all along. so anyone having similar issues this may b your problem.

Methodical4u · 11-14-2011, 06:06 PM

Quote:

Originally Posted by henry0844

well, I fiddled with the intake clamps and found a couple that didn't look like they were tight enough around the throttle body. so I tightened them up and moved them to get a better seal around the piping. car seems to b driving quite a bit better. I will reserve judgment until I put a few more miles on her but this may have been the problem all along. so anyone having similar issues this may b your problem.

I thought you had tightened them more already?

henry0844 · 11-14-2011, 06:32 PM

Quote:

Originally Posted by Methodical4u

I thought you had tightened them more already?

I tightened the other clamps near the maf sensor. I was waiting til the weekend to mess with the other clamps and replace them with the spare tbolts I had.

wstar · 11-14-2011, 07:04 PM

Another way you can check for vacuum leaks in the intake tract (PCV hoses, etc, aside from the main intake tubes and throttle bodies) is to spray something volatile like starting fluid nearby the suspected connection with the engine running. If there's a vacuum leak the engine will suck in a bit of the aerosol starting fluid and you'll hear the idle speed change from the mixture change. Just be careful about how much you spray, hot metal surfaces, etc. You should have a fire extinguisher on hand in your garage anyways

henry0844 · 11-14-2011, 08:25 PM

Quote:

Originally Posted by wstar

Another way you can check for vacuum leaks in the intake tract (PCV hoses, etc, aside from the main intake tubes and throttle bodies) is to spray something volatile like starting fluid nearby the suspected connection with the engine running. If there's a vacuum leak the engine will suck in a bit of the aerosol starting fluid and you'll hear the idle speed change from the mixture change. Just be careful about how much you spray, hot metal surfaces, etc. You should have a fire extinguisher on hand in your garage anyways

^^ the next step if the car keeps running strange. thanks for the heads up

Methodical4u · 11-14-2011, 08:47 PM

Quote:

Originally Posted by wstar

Another way you can check for vacuum leaks in the intake tract (PCV hoses, etc, aside from the main intake tubes and throttle bodies) is to spray something volatile like starting fluid nearby the suspected connection with the engine running. If there's a vacuum leak the engine will suck in a bit of the aerosol starting fluid and you'll hear the idle speed change from the mixture change. Just be careful about how much you spray, hot metal surfaces, etc. You should have a fire extinguisher on hand in your garage anyways

Man, I remember doing that for hours when I had a boost leak on my Evo... I sprayed a little and thought I found it and then do it again and it wouldn't work and on and on... SUCKED!

coolvans1988 · 06-17-2014, 01:47 PM

a little late there buddy. ^^

roplusbee · 11-05-2011, 05:23 AM

Quote:

Originally Posted by ddunk80

you get a cool, filtered air, if you add some cold air intake which provides the right to hold the throttle body and is ready to burn and give you the strength to.

WHAT? Is this translated? If not, you need to use one.

To the OP:

Black residue coming from the exhaust is normal if you are running an upgraded exhaust system. The inside of my TDX is pretty dark. If you are smelling unburned fuel and your eyes are irritated after idling in place, I would agree that it's rich. Put it up on the dyno and you will know for sure

henry0844 · 11-05-2011, 03:10 PM

Quote:

Originally Posted by roplusbee

WHAT? Is this translated? If not, you need to use one.

To the OP:

Black residue coming from the exhaust is normal if you are running an upgraded exhaust system. The inside of my TDX is pretty dark. If you are smelling unburned fuel and your eyes are irritated after idling in place, I would agree that it's rich. Put it up on the dyno and you will know for sure

I'm going to get a tune from Stillen soon so I'll keep everybody updated once it happens. Stillen also thought it was wierd that my car ran worse when ambient temps r cold. could my fuel pump be bad, and unable to provide enough fuel for cold weather?

11-10-2011, 07:31 PM	#1 (permalink)
Footloose301 A True Z Fanatic Join Date: Apr 2010 Location: Naples, FL Posts: 2,659 Drives: 40th Rep Power: 22	I removed both of those pieces of plastic on both of my 370's and never had issues with the MAF. __________________ 2010 40th Anniversary 370Z

11-14-2011, 07:04 PM	#10 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	Another way you can check for vacuum leaks in the intake tract (PCV hoses, etc, aside from the main intake tubes and throttle bodies) is to spray something volatile like starting fluid nearby the suspected connection with the engine running. If there's a vacuum leak the engine will suck in a bit of the aerosol starting fluid and you'll hear the idle speed change from the mixture change. Just be careful about how much you spray, hot metal surfaces, etc. You should have a fire extinguisher on hand in your garage anyways __________________ 7AT Track Car! Journal thread / Car setup details

06-17-2014, 01:47 PM	#13 (permalink)
coolvans1988 Enthusiast Member Join Date: Oct 2012 Location: NA Posts: 402 Drives: 2013 370z PW A/T Rep Power: 13	a little late there buddy. ^^ __________________ AAM S-line Midpipe / AAM CAI / Nismo Muffler / Swift

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11-10-2011, 09:44 PM	#2 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 17	Don't forget to check all those dumb little things like that the MAF is plugged back in and such... any other wire you see, follow it, check it for breaks, burns, obviously being unplugged, etc etc.

11-11-2011, 01:45 PM	#3 (permalink)
Will@Logic Enthusiast Member Join Date: Feb 2011 Location: Irvine, CA Posts: 291 Drives: 09 Infiniti G37S 6MT Rep Power: 15	Shouldn't happen. If anything you should feel a difference after putting the intakes in.

11-14-2011, 05:30 PM	#7 (permalink)
henry0844 Base Member Join Date: Oct 2010 Location: ventura Posts: 167 Drives: 10 370 base sprt pkg Rep Power: 15	well, I fiddled with the intake clamps and found a couple that didn't look like they were tight enough around the throttle body. so I tightened them up and moved them to get a better seal around the piping. car seems to b driving quite a bit better. I will reserve judgment until I put a few more miles on her but this may have been the problem all along. so anyone having similar issues this may b your problem.