99 civic EM1 with bad gas mileage? alarm question?
my car has been getting some pretty bad gas mileage, 99 civic si. like 250 miles to a tank, i dont rag on my car either. i always use premium gas. i have 160,000 miles on it. i had to replace my upstream o2 sensor a month ago. maybe i didnt reset the ecu correctly? i just disconnected the battery for 10 mins. i recently installed an AEBS intake manifold, im not sure if it matters but i used the grommets off my friends d series IM they were flat, the b series grommets are kinda recessed. im talking about the grommets between the fuel injectors and intake mani. could that be a problem?
could it be tps?
fuel pump?
my gas gauge is fluctuating more than normal.
my idle is kinda low at stop lights.
i replaced plugs with ngk about 2 months ago, dizzy cap and rotor about a year ago(not oem), fuel filter about a year ago(not oem).
any suggestions?
my stock alarm just recently stopped working also. why would that be?
Reply With Quote