Rb25Det S1 Missing And Coughing

[t304vkcalais]

so after about 3 months i have my cefiro running again, so current specs are custom grind cams,gt35r turbo running 7psi and a 4 inch to 3 inch reducer until i get the money to get the ems fitted and tuned,forward facing plenumwith 4 inch throttle body, 3 inch turbo back exhaust, 38psi fuel pressure with a walbro 255 intank pump.

current issue is under load it will chug and not want to rev, have set the tps up with .5 v closed 4.1 v full open,free reving it will rev fine all the way to the liminter but sometimes it has a flat spot but can rev through it.

im wondering if

a)afm is to close to inlet of turbo, is about a foot away atm but was further away and still did the same issue.

b) injectors are full of shit from sitting in open air for so long.

c) i do have a air leak at the manafold to head but carnt see this causing it to run the way it does.

d) coil pack issue, has new plugs gapped down to .8mm, going to pull the coils out 2moz and give them a good coat of liquid rubber.

just need the car to drive to work and back for a week or 2 while the other car is getting fixed.

cheers tim

[GH05T]

if it is the coils i have a cheap set of GTR coilpacks for sale

[t304vkcalais]

i got another set here just the ones in it are yellow jackets but will see how they go

[blind_elk]

What revs / load cause the "chug"?

Have you tried replacing the fuel filter?

[nate817]

I have just had this problem get to 4-4500rpm and it wouldn't want to go anymore. I had a boost leak and coil packs. Seemed to have fixed it now

[t304vkcalais]

ok well today i replaced the fuel filter threw some injecter cleaner in the tank, cleaned the maf out.

now got it running a bit better, can actually drive it to work thankgod. have a mate with a smoke machine ile throw that in the intake 2moz and see if theres any boost leaks. coils im going to pull them out and coat them in some liquid tape to make sure there not arching out in saying that i carnt see and sparks at night from them so may aswell clean the contact of the coils as well.

at the moment its running like crap on light throttle backfires while crusing, but once its got 7 psi in it it pulls f**king hard.

at idle you can see the black smoke puffing out the exhaust is currently running 2 bar fuel pressure at idle

[SIFTY32]

Hey buddy I doubt it will be the coilpacks but you never know, possibly a faulty cas? hows the ignition timing?

[t304vkcalais]

ok so update, pulled the coils out and cleaned the contact points and covered them iin liquid tape,also regaped plugs down to 0.60mm, reset the timeing to 15 below, runs alot better now, can actually drive it to work, reset the tps and took it for a drive, blowing massive amount of black smoke while crusing and idleing, running 2.4 bar fuel pressure, any ideas why its so rich at idle?

also when its cold it backfires at idle, fairly loud aswell,dosnt take long to fill the house up with smoke, housemate dosnt like that at 8am lol

[t304vkcalais]

FIXED tps issue