SoCal-s130

Every time it is hot outside and my car warms up it pops when down revving. Any ideas why? I just got some hotter plugs and going to see if that helps any.

RodMoyes

I've never known of an S130 that DIDN'T pop on deceleration...


Rod.

SoCal-s130

Mine only pops when really hot.

apollo

Most older cars will do this. Even newer cars pop, its just hat its more pronounced on the Z especially if you have an aftermarket exhuast. Plugs shouldnt make a difference. The BCDD is what is supposed to take care of this ubt mine never worked so i disconnected it.

lww

Yeah, you should hear it with a big custom exhaust! Think megaphone! That little pop gets magnified into a pretty good boom!

SHADY280

my straight pipe make huge pops!!!! i scared every man, woman, and child in town the other day that way!!!

Carl's Z

I have an after market exhaust that came with the car when I bought it. It says "Blue Streak" on it. Not sure who the maker is, but as my BCDD valve is capped off, it makes some great noise decelerating at 2k RPM and below, and sets off lots of alarms. Kinda funny, but everyone says it sounds great, so I'm happy...

Heat Rave R

Haha, everytime mine does it I keep thinking I'm hurting something and instinctively take it out of gear to drop the rpm's right away. ^^

RodMoyes

Nah, you're not hurtin' nothin'... You just have that way cool Race Car sound goin' on!

Rod.

SHADY280

when my buddy ran a glasspack on his z, you could see a flame coming out of the tailpipe

lww

Now THAT would be cool!

jfairladyz

I'm still getting used to the fact that my turbo engine doesn't pop while decelerating. That noise was a disinctive part of driving my Z before the swap... oh well, atleast I don't draw as much attention from law enfocement any more

rxKaffee

Is it not possible for a Turbo'd car to have exhaust pop? Or is your turbo just tuned decently? lol

Heat Rave R

Mine is a turbo, and it pops. Stock turbo, but 3" piping, cat, and muffler though.

SoCal-s130

Ok, it is really starting to bug me now. This doesnt sound normal to me, maybe I have a different pop then everyone else? Because it sure doesnt sound cool, nor sounds like a race car to me, haha.

81 Black L28E

i seem to get less pop if i make sure i have no leaks into the system ether vac or ex ether one ..if there is a little leak in ether of them then the pop pop will be louder and do it more times .even if i tighten everything down and check then recheck everything , i still have some pop around 2500 rpm ...if droped into low when slowing down well then popopopopop hahahaha ..if iam alittle over top dead on the dissy then it seems to get alittle popopopop ...when my egr had a leak it went crazy popopopopopopopopopopop ..
if you have a header then you will have more pop then my ollies ..
its just the way of the z !

rxKaffee

I don't know if these cars have/use an air intake temperature sensor... but if it seems excessive, durring hot weather, it could be an issue with your ECU not decreasing fuel for less dense air.

jfairladyz

They do. It's inside the AFM. If you look into the AFM opening you'll see a small peice of plastic protruding...thats it.

rxKaffee

I bet thats what your popping problem is then... I'd leave it though :P

duowing

That's almost why I begin to think everyone runs across these crap when cold better when warm situations. Is that the air temp sensor must be starting to crap out.