is this normal.....smoke

Black smoke = fuel
Blue smoke = oil

I'd say it's running a tad rich in higher RPMs. Seems like a lot of high mileage SD cars do.

You know, I havent seen many mustang fox's that dont blow out some black smoke in the upper rpms...I wouldnt concern yourself with it, probably all good.

sbf 302 have a very high ramp rate, and i believe this is why they dump raw fuel on the shift changes at higher rpms...if i remember correctly. its becomes much more noticeable when running w/o cats. mine has done since day 1 even with the stock rebuilt motor.

*oh and yes i meant for the black smoke....

My SD engine used to have some black smoke in the upper RPMS until I rebuilt the engine now its gone... The more miles I put on the car the worse the black smoke got.

the backfiring is probably an exhaust leak, mine was backfiring bad and it turns out I had a missing header bolt

my car is mass air, and I also have black smoke in higher RPMs...no cats though...

wht93gtEd said:

my car is mass air, and I also have black smoke in higher RPMs...no cats though...

Click to expand...

How many miles on the engine?

No.

nope mine blows black smoke high up as well, I think it looks cool when your roasting people and shifting lol....

mine blows plenty of smoke...but its blue. about a quart a week too...time for the 351 swap

emagdnim said:

How many miles on the engine?

Click to expand...

when I got it...55k...now it has 117k.

It's been the same since I had it...just a lil black smoke in higher RPMs.

when mine was still sd it would black smoke a little at high r's. that was until i blew a headgasket and it was all white. mass air now on a fresh motor and just a touch at high r's. your fine, no worries.

I get black smoke, and an ocassional backfire shifting in the upper rev.