Worried
Trending Topics
#8
Guess whose back, back again...
Thread Starter
iTrader: (4)
Join Date: Jul 2003
Location: AZ
Posts: 4,219
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
It was while I was flooring it in first. I heard and felt it. Sounded like the engine. Its running at normal temps and seems to be fine.
This happened once to me when I floored my bros old C5 past redline. Anyone have any clue what that hell that noise means/is?
This happened once to me when I floored my bros old C5 past redline. Anyone have any clue what that hell that noise means/is?
#9
Registered User
Join Date: Jun 2003
Location: San Diego, CA
Posts: 2,560
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
You can't get the engine past redline with Stock ECU by just accelerating. Our car has a rev limiter. However, if you down shift while redlining in a higher gear. ie redline in 2nd and accidentally hit 1st when trying to get third, then the RPM's can obviously go well over redline.
Can't imagine what the noise would be. A boom sounds like a backfire to me. My Z has never backfired just from accelerating though.
Can't imagine what the noise would be. A boom sounds like a backfire to me. My Z has never backfired just from accelerating though.
#11
New Member
iTrader: (1)
Join Date: Jun 2003
Location: SoCal
Posts: 1,544
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
It could be that if if floored it, especially if you lifted off a bit just before it, that the engine got a bitmore gas then it burned, then when you floored it, the unburnt gas combusted on it's way out.. Um, my non-technical description of a backfire. I'm *sure* someone will correct what I got wrong...
#12
Registered User
Join Date: Jun 2003
Location: San Diego, CA
Posts: 2,560
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Dissident, close enough. I got backfire when my engine was cold and I revved it in neutral. When I let off the gas, RPM's dropped quickly and got a small *bang*. I don't know how loud a boom is, but it sounds like it might be louder than a bang from the way Enthuziast described it.
Enthuziast, if you got a loud bang during WOT acceleration I would check you plugs. If they are fouled that could cause backfire. Do you have any mods on your Z? This would be helpful info.
Enthuziast, if you got a loud bang during WOT acceleration I would check you plugs. If they are fouled that could cause backfire. Do you have any mods on your Z? This would be helpful info.
#13
Registered User
Join Date: Jan 2003
Location: Canada
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Backfire is the burning or exploding of fuel in the exhuast manifold...makes loud boom and possibly damages the manifold or loose/weak exhaust parts...sounds may be normal for a race car decelerating for a turn...scary for your grocery getter though!
#14
Registered User
Join Date: Sep 2003
Location: ________
Posts: 1,826
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
You can also get backfire from bouncing off your rev limiter nonstop. I know because the t/a I used to race had an adjustable rev limiter and we would tested to see it's effectiveness.
#15
Registered User
Join Date: Sep 2002
Location: TennessZee
Posts: 1,293
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally posted by EnthuZiast
Floored it in first and heard a loud BOOM. Think I ran past redline.
WHAT THE HELL WAS THAT NOISE!?
Floored it in first and heard a loud BOOM. Think I ran past redline.
WHAT THE HELL WAS THAT NOISE!?
![Confused](https://my350z.com/forum/images/smilies/confused.gif)
![Frown](https://my350z.com/forum/images/smilies/frown.gif)
OK, in all seriousness, as a mechanical engineer I have to believe that the boom was a backfire that actually accelerated you to supersonic.
Sorry. Really however, do you remember seeing a "do not enter" sign disappear under your front bumper?
OK, I'm out of ideas.......
WayneTN
#17
Guess whose back, back again...
Thread Starter
iTrader: (4)
Join Date: Jul 2003
Location: AZ
Posts: 4,219
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Im not sure what it was. My car is BONE stock.
But ever since that BOOM I experience grinding when switching from 4th to 5th.
Think these issues are related?
Also does anyone know of a good mechanic at Nissan of Scottsdale?
But ever since that BOOM I experience grinding when switching from 4th to 5th.
Think these issues are related?
Also does anyone know of a good mechanic at Nissan of Scottsdale?
Thread
Thread Starter
Forum
Replies
Last Post
RP-350Z
2003-2009 Nissan 350Z
20
07-20-2002 07:47 AM