Engine performance starts @ getting the engine to breathe better! Air cleaner,air intake,exhaust!! You start here! Along with good or better plugs ,cap & rotor changes( tune up)!
Seems like i lost a few mpg after my recent tune up. I'm getting somewhere in the ball park of 24mpg. I drive speed limit & shift at 3k rpm. Could it be my O2 sensor? Also i still have my cat attached to my (stock) set up. Do you gain any MPG's removing your catalytic converter?
My mpg dropped dramatically too ... I was avg 29 mpg but after adding Lucas gas treatment and topping off the tank {at a EXXON station that usually don't go to} I checked my mpg at my next fill~up and it dropped to 16 mpg ... I still have'nt figured it out yet ... I've changed the plugs, air/fuel filters, cleaned carb and added a can of Seafoam fuel stabilizer ... Gonna see if there's any change with my next fill~up ...
Any updates on your gas mileage? I too added Lucas Gas Treatment and I think my MPG decreased dramatically from 26mpg to 14mpg. I changed my air filter and did an oil change... idk what it is. :/ I have a stock carb and a Magnaflow 40 Exhaust. When the truck sits over night or through out the day without driving it, the IDLE sticks. I let it idle on high for about 5 minutes but the idle is still at like 1200-1300rpm... I rev the throttle a little bit and it'll go down (sometimes) otherwise it'll just go back up to 1200-1300rpm. Would a Tune Up fix the Idle from sticking and would it help my gas mileage?
check your spark plugs and wire by using a ohms meter..anything from 4 to 7 is good..if not u might be buring fuel from your carb coke..might need to tune up the carb and maybe timing.....i get about 22-24 mpg on street and 26 on freeway...all i did is chage plugs rotor vaccum line fuel filter....my truck use to get around 19mpg and would backfire wen its cold...but now w new vaccum line and EGR vale it never dose it anymore...knock wood..
o2 sensor helped me, but I had a factory one in my truck with 297xxx miles on it. Replacing the accel pump and aux accel pump diaphragms also helped me.
I noticed it runs rich. I smell gasoline from the exhaust. The idle runs high even after its more then warmed up, so I have to throttle it to get the rpm's down. I put in a full tank and within a few days its almost empty... this is killing me. How much would a shop charge me to change those things, I'm not very automotive savy... :/ my tank must be like a 13 gallon tank because every time I fill up, it stops at 12.5 gallons. At $52 for a full tank, this is killing me in my wallet. Help.
My mpg is back to 29 now ... All i did was add a couple cans of Seafoam over the past few fill-ups and it gradually climbed back up ... Not sure if it was the Lucas gas treatment i used or just got bad gas that time ... Needless to say, i have'nt added Lucas since then and stayin' away from the EXXON station i got the gas from and it's been getting better ...
