S13 getting 8 Mpg highway - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Skynet · 11-19-2013, 12:29 PM

I have a 1990 s13 with a fully stock ka24e that currently gets about 8 miles to the gallon highway. I've replaced the fuel pump, fuel filter, done 2 different full tune ups since this started happening. Swapping a blacktop in soon, but it's still my daily until then so I'd like to fix it if at all possible. I'm assuming it's some type of an injector malfunction, even though when I pulled the ecu, there were no codes at all. Car does seem to run rich, I just recently put on a new exhaust and within a week the tips were coated in thick black sut. Any ideas would help a ton, so thanks in advance.

11-19-2013, 12:29 PM	#1
Skynet Join Date: Jul 2012 Location: Louisville Age: 31 Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	S13 getting 8 Mpg highway I have a 1990 s13 with a fully stock ka24e that currently gets about 8 miles to the gallon highway. I've replaced the fuel pump, fuel filter, done 2 different full tune ups since this started happening. Swapping a blacktop in soon, but it's still my daily until then so I'd like to fix it if at all possible. I'm assuming it's some type of an injector malfunction, even though when I pulled the ecu, there were no codes at all. Car does seem to run rich, I just recently put on a new exhaust and within a week the tips were coated in thick black sut. Any ideas would help a ton, so thanks in advance.