Dbedner

This is my first post on here and I’ve had my s2000 for about 6 months now. Ever since I got the car I’ve had a slight gas/burning smell but didn’t think much of it as the precious owner said it was the aftermarket fuel pump running rich.

But about a month ago after I got my car back from the paint shop the car has been running really bad. The idles are shakey, 1st and 2nd hear it hesitates terribly, and the car will misfire out of no where. I had a CEL w/ the code P0107, I replaced the MAP sensor with no luck, and I’ve tried reading other threads to see my next step but I’m kind of lost here.

some mods to know are
Walbro 255 LPH fuel pump
full tomei straight pipe exhaust
invidia test pipe
aftermarket fuel injectors ( don’t know the size )

any help is appreciated!

zze86

No ECU upgrades?

You have a larger aftermarket fuel pump with unknown, but presumably larger injectors. You've got way too much fuel going in.

Get some OEM injectors, new spark plugs and you should be OK. You'll be surprised how much stronger she runs.

windhund116

Do you know why the previous owner changed the fuel pump?

Dbedner

Thanks for the reply, do you know what size the oem injectors are?

Dbedner

He said he was looking to boost it as am I, I’ve heard it’s a solid fuel pump though so I’m thinking I’ll keep it for when I boost it. I’m looking at the full blown kit

zze86

IIRC 360 cc/min

if you're planning on going boost, maybe just put the money towards a standalone ECU and have the injectors you currently have scaled/tuned correctly.

Dbedner

That’s what I was thinking but I may just go with the oem injectors and plugs, that turbo might take a little bit lol.

any recommendations on plugs?

zze86

stock replacement - NGK 7746 IFR7G-11KS

ATOice

Look on the site for threads. You may find selling some stock OEM injectors. Plugs you can get anywhere. I have NGK 7173's in mine - but I'm boosted.

RolanTHUNDER

NGK Iridium BKR8EIX (great, and recommended for boost as well)