I know i need new coils, got the code from ECU. 1320. and one other one 0302. I replaced cylinder bank coil with a used one, and car seems to drive better. BUT
I would normally get 300 miles on the tank before fuel ligh comes on. Now I only get 260, so 40-50 miles less then usual.

Could this be all the coils? or is something else involved? TB cleaned, seafoamed... new MAF, new spark plugs... original coils at 100K miles.

Thanks

 

Can Anyone Comment Please..

 

it is very difficult to gauge just by going on MPG. you could have driven the car harder on the second tank and hence the lower mileage. has the code reappeared since you replaced the bad coil? what plugs did you pick up for the replacement? these could be contributing factors so i am just trying to get a feel for the situation.

 

I replaced plugs with Bosch platinums.. And I noticed frop in MPGs on three tanks already. For the past five years it was approx 300 miles on 15 galons, now its 250-260. I will have to scan today again, to see if code was thrown, cause I only replaced 2nd coil, so there may be other ones bad.
Thanks

 

i would yank out the german plugs and put in the japs. replace with either NGK copper or plats. some people have not had issues with bosch and other have had many issues like you are describing including misfires. i know it is not what you want to hear after spending for the plugs but you see the difference if you change. my advice is change the plugs again and then check for misfires after that.