Slow acceleration after intake and exhaust

Methodical4u · 11-10-2011, 10:42 PM

Quote:

Originally Posted by henry0844

thanks guys for all your input so far. as to the clamp question, I have worm type at the throttle body and t bolts for the rest. I have some extra t bolts that Im going to install at the throttle body just to make sure everything is clamped securely. I'm going to look at everything this weekend and see if I can find out if there is a leak somewhere. about the idle, it seems to idle smoothly but sometimes idles a little rough. the thing I notice the most is when the car is warmed up and idling the revs will drop a little then go back to normal. idle doesn't bounce around but drops slightly then goes back to normal. it's also not the fan kicking on either because the fan doesn't come on when the revs drop. hope this makes sense.

hmmmm.... I haven't been around my car while it was warmed up and idling to see if it does this, so i'm not sure about it.... i'm to cheap with gas lol. It's always possible though. How many miles are on the set-up since everything was installed?

There is also the chance the mechanic damaged the MAF sensor when doing the install. Not like most people are going to be honest and pay 200 or however much those things are to replace it.

Methodical4u · 11-10-2011, 10:44 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.

henry0844 · 11-10-2011, 11:53 PM

Quote:

Originally Posted by Methodical4u

hmmmm.... I haven't been around my car while it was warmed up and idling to see if it does this, so i'm not sure about it.... i'm to cheap with gas lol. It's always possible though. How many miles are on the set-up since everything was installed?

There is also the chance the mechanic damaged the MAF sensor when doing the install. Not like most people are going to be honest and pay 200 or however much those things are to replace it.

2000 miles on g3's, 500 with both g3's and exhaust. like I stated before, car ran great then overnight took a **** on me. hasn't run well since.

Methodical4u · 11-11-2011, 12:39 AM

Quote:

Originally Posted by henry0844

2000 miles on g3's, 500 with both g3's and exhaust. like I stated before, car ran great then overnight took a **** on me. hasn't run well since.

Yeah, that's so odd. I really think the issue will wind up being a MAF sensor going bad or something along that line, but hopefully not.

henry0844 · 11-11-2011, 02:39 AM

Quote:

Originally Posted by Methodical4u

Yeah, that's so odd. I really think the issue will wind up being a MAF sensor going bad or something along that line, but hopefully not.

that would be ok with me. I just don't want my problem to b a mechanical one where it's going to need warranty work.

sstevens7 · 11-11-2011, 11:57 AM

My G3's don't move around a lot. The right side intake is really secure and the left has a little more play. I used a dremel to route out the stock holes so that intake pipe could fit through. If they took out the stock plastic pieces and put your intake pipes in I could see them having a ton of play. That's weird though that you had them installed at Stillen and they deviated from their own instruction manual on how to do the install. Hmmmm...

Will@Logic · 11-11-2011, 02:45 PM

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

henry0844 · 11-11-2011, 09:56 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, 10:53 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 · 11-12-2011, 12:49 AM

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, 06:30 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, 07:06 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, 07:32 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, 08:04 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, 09:25 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

11-11-2011, 11:57 AM	#51 (permalink)
sstevens7 Base Member Join Date: Apr 2010 Location: Tucson Posts: 199 Drives: '10 370Z TOUR/SPORT Rep Power: 15	My G3's don't move around a lot. The right side intake is really secure and the left has a little more play. I used a dremel to route out the stock holes so that intake pipe could fit through. If they took out the stock plastic pieces and put your intake pipes in I could see them having a ton of play. That's weird though that you had them installed at Stillen and they deviated from their own instruction manual on how to do the install. Hmmmm... __________________ "Anyone driving slower than you is an idiot, and anyone going faster than you is a maniac?" - George Carlin / 2010 RED 370Z Touring w/SPORT / Volk GT-S / Stillen G3 Intake / GTM HD oil cooler / F.I. CBE w/18" RES #227 / F.I. HFC's / UpRev Tune / Swift springs / Apline INA-W910

11-14-2011, 08:04 PM	#59 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	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

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11-10-2011, 10:44 PM	#47 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 16	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, 02:45 PM	#52 (permalink)
Will@Logic Enthusiast Member Join Date: Feb 2011 Location: Irvine, CA Posts: 291 Drives: 09 Infiniti G37S 6MT Rep Power: 14	Shouldn't happen. If anything you should feel a difference after putting the intakes in.

11-14-2011, 06:30 PM	#56 (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.