Need a advise guys on fuel economy skyline r33

[Bob Virk]

My car has done 140 k which is not too bad but it's fuel economy is shit and has bad starting in the morning. Engine turn up then stall eventually if I don't put my feet on acceleration it's just in morning then whole day it's alright. But I can't understand what's wrong with it I has done a engine service, new coil packs, new spark plugs, new AFM but still it's doesn't have a much power. It's 97 series 2 rb 25 GTST by the way . It's doing 300 to 350 per tank . Any idea please would be appropriate.

[PranK]

Hey Bob, have you changed the O2 sensors?

 

[Bob Virk]

Not yet but thinking about that but nothing to do with bad starting if it's o2 sensor mate . What do you think?

[Bob Virk]

O2 sensor is possible but it's nothing to do with bad starting mate isn't it?

[KiwiRS4T]

Try pulling the wires off the temp sensor for the ECU (its the one with two wires not the single wire). If it starts better from cold get a new sensor.

[Kinks]

Work out your economy in L/100km.  Saying "to a tank" is useless.  Are you filling up after using 60L? 55L? 40L?

[inmaniac]

Have you covered all of the advice given in your other thread here? 

 

Oh, and here? 

Stop spamming and address the advice already given to you Bob. No use asking if you're not going to take the advice given to you. O2 sensor is a BASIC one suggested by multiple people. There's multiple stages to diagnosing your problems, you need to attack via a process of elimination.

If not, take it to a pro.

[niZmO_Man]

Standard ECU? Boost leak somewhere? Lots of reasons.

[GTofuS-T]

Another thing to consider is a fuel leak, one of the lines leaving my tank had a split inside, which leaked if you put any pressure on it, as well as the main tank seal is known to deteriorate.

[blind_elk]

Clean the injectors.

[conan7772]

 

+1 Injectors

are they stock or aftermarket

cheap injectors can cause bad starts, shit economy and power