is this normal? it doesn't do it when its warmed up. just the few minutes that its cold. its an 86 na

 

Ive started mine in -30 degrees. And other assorted cold temps below freezibg (32) and ive never had it misfire.

 

tune ups are cheap
get some new ngk plug/wires

 

the old engine and the engine currently in my s4 vert have done this...maybe cuz the aws has been removed and it tries to warm up at 1500 rpms

u hear is a prrrrrrrrrrrrrrrrrrrrrrrrrrr brap brap prrrrrrrrrrrrrrrrrrrrrrrrrrrrrr brap prrrrrrrrrrrrrrrrrrrr brap prrrrrrrrrrrrrrrrrr

then when it gets warmed up itll be fine

i havent been around any other N/As warming up except mine so i figured it was normal if the old and new engine do the same thing

 

its not a brap brap, its more like purrrrrrrrrrrrrrr put put purrrrrrrrrrrrrrrrrr

my aws is still hooked up, but my idle is all kinds of messed but its done it since i've had the car

 

my fault.....it is a purrrrrrrrrrr put put prrrrrrrrrrrrr sound lol

brap would be some serious loud misfire with flames lol

im assuming its just the internals building compression or it runs rich or something in the warming up process?

 

thats what i was thinking

 

my first rx7 did that...

plugs, wires, and tps fixed it....

 

TPS is key... Vac. leak is also another 'pulsing' thing.