Jump to content
SAU Community

Recommended Posts

Have you done a compression/leak down test yet on the engine?

heh, not really looking forward to that... it that's the case i can just bin the engine...

its getting really hopeless and im even considering getting rid of the car...

list of things i already tried:

- replace sparkplugs

- replace coil packs

- replace injector

- replace ignition module

- check connections on coil packs and injectors

as i already mentioned it's only on 1st cylinder, because if i unplug coil pack or injector on any other cylinder it gets even worse...

one fact that might be helpful is that is started misfiring shortly after i installed walbro fuel pump, because old one was stuffed.

other than that... no clue... tried absolutely everything that could be causing misfire except compression leak...

can you also recommend me any good mechanic in Adelaide for this situation that wont charge me more than car is worth to fix it?

what ecu are you using??

the other day my car rb20det with a microtech was running fine, turned it off for fueling started it up and it ran on 4 cylinders. limped home shut it off then started againg and it ran fine...

check your injector loom for rubbed through wires. maybe when you unplug it, it moves the wires then they touch and earth out again??

another thing you can try is swap #1 injector with # 2 injector and see if the problem swaps to #2 cylinder.

you can also do this with coils to find faulty coils.

my pulsar did exactly the same thing as your car,

i know its not the same engine but it might be kinda the same problem.

we checked everything

like it would sould like wrx then it would come right at high speed. but then it would sometimes not....

in the end it was the head gasket.

might wanna do a compression test. get that head fixed asap if it is,

because you dont want it to warp.. try not to drive it much.

  • 3 weeks later...
Any news on this? Mine started doing it today :D

turned out it wasn't a head gasket... it was a coil pack all along, just a different one... but here's the thing:

When it initially started misfiring i tested each cylinder and found it was first coil pack... so i replaced it, it was alrigth for a day but then started misfiring again and I (idiot) just assumed it was first one again so I tried doing replacing everything on first cylinder; injectors, sparkplugs, loom, ignition module, did compression test... then when i was really desperate i tested each cylinder again, and found out that first cylinder is not misfiring anymore, but it was 6th that time... so i replaced 6th coil pack and now it's running smooth as...

try these steps for your car:

1. when the car is running try disconnecting each coil pack... when you disconnect a working one car will sound even rougher, but when you disconnect a faulty one it will stay same... that way you'll find out which cylinder is misfiring... if all of them are it's probably fuel pump

2. try replacing (in order of most likely in my opinion):

- spark plugs

- coil pack

- fuel injector

- ignition module

- loom

3. if it's none of these do compression test, but as many people already said, head gaskets are rarely an issue

let me know if you have any question... i've just been through all these steps recently so I might be helpful

Edited by Rocky88

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

    • Thank you, 100% the intent. New coils were due and the 17" sixers look/feel loads better than the stock wheels. The aero options are so spot on.   Thanks for the warm welcome, all!
    • 98 r34 gtt Been rocking my latest setup and car running like never before. Have put a good 200 miles on it since all the latest changes and additions. everything is dialed in and have been driving it a bunch.   However, all a sudden last weekend as soon as I pushed throttle passed 4k and the engine stumbles, (slow or fast acceleration) hesitates and doesn’t go above 4100 or so, like a misfire. Everything else seems fine. I had a “good” set of coil packs that I removed from car when I first got it when I changed them over to new coils. I swapped out current ones for those, but no change. I also changed the plugs, no change. Seems to rev over 4 when out of gear with no load just fine no “misfire”, but as soon as its in gear with a load of any kind, it “misfires” as soon as rpm drop back below 4 k it runs perfectly, smooth, starts, restarts and drives fine as long as I keep it below 4 k while in gear. All readings look fine, no CEL   Any idea as to what could all a sudden cause an issue when pushing rpms passed 4 k?
    • When you say your cams are 272/262 is that 272in and 262ex?
    • We're arguing semantics. I am saying 45 accel and a 55 deccel ramp are "2 ways". Even a 45 degree ramp and an 89 degree ramp is "2 ways", because it is literally... two ways. The cusco 55/30 ramp is a 2 way. It's two ways. I get it though - in normal nomenclature a "2 way" would be 45/45 or 55/55 or 60/60 i.e the same locking in both directions. And something like 45/65 would be considered "1.5 way". I would then say if we're getting into the nitty gritty then every locking diff is a "2 way" diff and we should not speak in 1.5, or 2 ways but ramp angles instead. Which ofc if one of those ramp angles is 90deg, that side is not doing any locking. :p So Nismo don't obviously sell 3 things. The fact of the matter that they only sell two items really goes to show that there's a 2 way and a "1,5 way" which is really a 1 way. I believe the actual lockup for the 'adjustability' of the GT pro is really just setting preload for when the ramps actually start locking up. It's not changing how much 'wayness' there is. It is (somehow) horribly explained. People just buy whatever diff and go "locks up good bruh" and that's what ends up on socials forever.  
×
×
  • Create New...