WhiteWindsor

Do not get the 89 for gas mileage. My "STOCK 89" only gets about 6 mpg and that sucks man, i wonder if i have a vacuum line disconnected withthe carb and man. brake set-up that i am running?.

86GT 93LX

no my car stumbles about 5 minutes after start up then it goes away 30 seconds later and doesnt do it again. im pretty sure its the computer kicking in

86 5.0L

stumbles? any more descriptive?

might be the 02 sensors, once it warms up, are there any signs of it running rich?

nacanitihs

all highway w/ my 3.73s i get 22mpg and around town its like 17mpg

86GT 93LX

yeah it smells rich, it sounds like it going to die after 5 mins, the rpms drop and then it comes back to normal

tmajikman

Yep, that sounds like my car when I first got it, it did the exact same thing, stumble, almost cuts outfor about5 minutes unless you gave it a few revs, then ran pretty good. I checked every vacuum and found a few off, or not plugged with a bolt, or not plugged in at all. Fixed all of those and now she idles great and helped with my gas mileage as well.

86GT 93LX

no, it runs fine when you start it, perfect, then after 5 mins of perfect idling it stumbles for like 30 seconds then comes back to normal

86GT 93LX

ok i finally found my meter,lol. code 11 system pass just like always. this car has never pulled any codes since ive had it. idont remember but it seemed to have been getting bad gas milage before gutting the cats, so unless the i.a.c. being dirty again can cause this or my CAI i dont know. im checking vacum lines right now but cant find any leaks.im averaging 10mpg...doesnt seem like my clutch is slipping, cus i geuss that might be able to affect it. i really dont think i drive it hard enough to be getting 10mpg mixed driving

86GT 93LX

found no vacum leaks any place, so i have no idea why so bad on gas!!!

rmodel65

i was getting about 28 mpg with my 273's but its dropped a little maybe 25 on the road with my 3.55's