Jump to content
SAU Community

Recommended Posts

hey guys i am the pround owner of a 92 gtst type m, currently my car is basicly stock (enginewise) with a few minor mods such as

- 3inch straight through exhaust with twin 3inch muffler

- gizzmo MS-IBC

- bmc high flow panel filter

it has a bad missfiring problem! i have changed the plugs check the coils all in working order, changed the feul filter basically service the whole engine bay but cant get ridd of this missfiring problem, it generaly happens under hard boost from 5000 rpm till redline, ive basically brang it down to a computer problem. on the cards however is a nistune remap and dyno.... but before i did that i have planed on installing a vg30, plus frount mout, and proper CAI System on the car.......

what are your opinions Remap first then mods or live with it for a couple of months until mods are done and the remap?

and any advice or input on the missfiring would be appreciated?

cheers Joe

Link to comment
https://www.sau.com.au/forums/topic/320811-rb20det-miss-fire/
Share on other sites

5000 rpm till redline, ive basically brang it down to a computer problem.

i have the same problem when it's cold. i've heard it's the computer spiking but i'm not exactly sure what that means. there's a popping sound and loss of power when it happens? it's not when my engine is cold but the temp outside. i think the cold air having more oxygen might be the problem.

my theory with mine is that a sensor is not working properly like the sensor that is supposed to change the mixture in high altitudes? this excess of oxygen might be causing some fires to be a bit too rich or lean.

mine doesn't hapen very often at the moment though but when it does, MAN is it a disappointing feeling...i'm not sure how to fix it man but when you find out i'd love a PM!

cheers

If the ignition system seems to be working properly then maybe you should start looking at fuel system.

Good luck with the trouble shooting mate.

hmmm yea i changed the feul filter next i gess is the pump or should i check somthing else in the fuel system first?

cheers mate

Could be many things when it comes to miss firing, you can try clean your AFM with CRC contact cleaner.

Also check the injectors and wires that gose into each injectors, or take to the mechanics and do some

fuel pressure test ! There are many variable for the miss firing problem. Best way is to start from something

easy and work you way up :)

Hope this helps good luck!

cheers budd!

ive decided to take it to the mechanics and gonna let let them sort it out, rather it get done right lol

ill let you all no how it geos :P

Maybe i missed something but this sounds like textbook coil failure. Time to replace the old OEM ones?

Maybe i missed something but this sounds like textbook coil failure. Time to replace the old OEM ones?

hey mate, yea its funni hey because i drove the car last nite and tested it out here and there and i had next to no missfires, i have it booked in at the mechanics teusday were i am geting a fair bit of work done to the girl so ill let you guys no what happens

:(

Cool, still think it could be your coilpacks failing. Thats the hey mine were like. on and off on the top end.

mmmm yea but i sussed them all out and they lookded ok ?

anyway i told the mech to just sort it out and let me no wats the go i have a sussy feeling like you said its one or more of the coils though!

mmmm yea but i sussed them all out and they lookded ok ?

anyway i told the mech to just sort it out and let me no wats the go i have a sussy feeling like you said its one or more of the coils though!

ya thats the thing though, they tested out ok, resistance was fine, but when i put some splitfires in there, it was night and day. if you got a friend with new ones, try it out if the mechanic doesn't clean up the problem.

ya thats the thing though, they tested out ok, resistance was fine, but when i put some splitfires in there, it was night and day. if you got a friend with new ones, try it out if the mechanic doesn't clean up the problem.

mmm will do man

its a shme splitfires are so expensive otherwise i would not hesitate to buy them lol

  • 2 weeks later...

must have been a pretty epic gap there to create that problem ive known of plenty of rbs with gaps all over the place and still ran ok. lucky it wasnt the coils. not such a big deal anymore anyway as theres a bunch of 3rd party rb coils coming out of china for half the price of oem or splitfires, with 99.99% identical performance

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • There's plenty of OEM steering arms that are bolted on. Not in the same fashion/orientation as that one, to be sure, but still. Examples of what I'm thinking of would use holes like the ones that have the downward facing studs on the GTR uprights (down the bottom end, under the driveshaft opening, near the lower balljoint) and bolt a steering arm on using only 2 bolts that would be somewhat similarly in shear as these you're complainig about. I reckon old Holdens did that, and I've never seen a broken one of those.
    • Let's be honest, most of the people designing parts like the above, aren't engineers. Sometimes they come from disciplines that gives them more qualitative feel for design than quantitive, however, plenty of them have just picked up a license to Fusion and started making things. And that's the honest part about the majority of these guys making parts like that, they don't have huge R&D teams and heaps of time or experience working out the numbers on it. Shit, most smaller teams that do have real engineers still roll with "yeah, it should be okay, and does the job, let's make them and just see"...   The smaller guys like KiwiCNC, aren't the likes of Bosch etc with proper engineering procedures, and oversights, and sign off. As such, it's why they can produce a product to market a lot quicker, but it always comes back to, question it all.   I'm still not a fan of that bolt on piece. Why not just machine it all in one go? With the right design it's possible. The only reason I can see is if they want different heights/length for the tie rod to bolt to. And if they have the cncs themselves,they can easily offer that exact feature, and just machine it all in one go. 
    • The roof is wrapped
    • This is how I last did this when I had a master cylinder fail and introduce air. Bleed before first stage, go oh shit through first stage, bleed at end of first stage, go oh shit through second stage, bleed at end of second stage, go oh shit through third stage, bleed at end of third stage, go oh shit through fourth stage, bleed at lunch, go oh shit through fifth stage, bleed at end of fifth stage, go oh shit through sixth stage....you get the idea. It did come good in the end. My Topdon scan tool can bleed the HY51 and V37, but it doesn't have a consult connector and I don't have an R34 to check that on. I think finding a tool in an Australian workshop other than Nissan that can bleed an R34 will be like rocking horse poo. No way will a generic ODB tool do it.
    • Hmm. Perhaps not the same engineers. The OE Nissan engineers did not forsee a future with spacers pushing the tie rod force application further away from the steering arm and creating that torque. The failures are happening since the advent of those things, and some 30 years after they designed the uprights. So latent casting deficiencies, 30+ yrs of wear and tear, + unexpected usage could quite easily = unforeseen failure. Meanwhile, the engineers who are designing the billet CNC or fabricated uprights are also designing, for the same parts makers, the correction tie rod ends. And they are designing and building these with motorsport (or, at the very least, the meth addled antics of drifters) in mind. So I would hope (in fact, I would expect) that their design work included the offset of that steering force. Doesn't mean that it is not totally valid to ask the question of them, before committing $$.
×
×
  • Create New...