Jump to content
SAU Community

Recommended Posts

HEY GUYS! CEF IS HAVING SOME TROUBLES. BASICALLY CAR RUNS FINE WHEN I START IT UP N I CAN DRIVE IT FINE FOR ABOUT 10 MINS, N THEN IT STARTS MISSING (RUNNING 5 CYLINDERS) I CHECK ALL SPARK PLUGS, AND CLEAND THEM. RAN IT AGAIN AND SAME THING HAPPENED. ALSO THERE IS A WEIRD NOISE COMING FROM THE PLENUM/INJECTORS. NEED HELP COZ ITS REALLY ANNOYING.

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/
Share on other sites

My Ceffy did similar and i just replaced the spark plugs and gaped them down to .8mm and the problem went away. Try new plugs they only cost about $4.50 each so try that first. If it does it at idle though its a good chance that its a coil pack.

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026271
Share on other sites

Hahaha.... I was using my phone and it like to use capitals on posts on the net! (knew i would got a capital comment)

Yeah but they r really only new plugs though! Ill check the gapping again (sooo much fun in this weather)

And yeah once it starts missing (so far i noticed either till the engine warms up or 10-15 mins of driving) it does it on idle and on acceleration, doesnt sound it on deceleration

Sounds like its got a lumpy cam or a wrx!

And if its a coil pack normally would one just go or the lot, and the fun part how do u find the faulty coil pack?

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026557
Share on other sites

And if its a coil pack normally would one just go or the lot, and the fun part how do u find the faulty coil pack?

Usually one can go on its own. If its missing on idle you just unclip a coil pack 1 at a time. If it makes it worse then you know you have uncliped a good one. If it stays the same you have unpluged the stuffed one. If one is stuffed you might as well replace them all as they will all start to fail from old age.

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026626
Share on other sites

Cheers guys!

Might do some tests on the coil packs!

The only thing i dont get is, It runs fine when i first start her up run perfectally then all of a sudden it starts missing once engine is at running temp or 10 mins of driving!

I wouldnt be so confused if it did it all the time, constatally missfired... But it doesnt! Any ideas on that as well?

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026759
Share on other sites

Cheers guys!

Might do some tests on the coil packs!

The only thing i dont get is, It runs fine when i first start her up run perfectally then all of a sudden it starts missing once engine is at running temp or 10 mins of driving!

I wouldnt be so confused if it did it all the time, constatally missfired... But it doesnt! Any ideas on that as well?

It would be the coilpacks getting hot and shorting out would be my guess.

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026770
Share on other sites

It would be the coilpacks getting hot and shorting out would be my guess.

Hmmm... And i never thought of that! (my excuse... Iv got heat stroke LOL)

If thats the case how could i resove it if its goin to heat up no matter what???

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026775
Share on other sites

Silicone sounds good right about now... Only coz i cant be fu(ked!

Well hopefully i got more $$$ my way soon... Will be handy!

Thinking of silicone as i will be doin a 30/25det conversion.... hopefully soon!

Link to comment
https://www.sau.com.au/forums/topic/303259-car-missfiring/#findComment-5026787
Share on other sites

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

    • After using a protractor for an actually accurate assessment of what is required,  and by NOT using my uncalibrated eyeball I worked out I need a 25° silicone bend from the TB ro the MAF, but, my choice was either a 30° or a 23° (23° is a weird spec), so I grabbed the 23° one from Raceworks I also grabbed 1mtr of 3" straight from Just Jap, I needed 350mm, but they only had 300mm, or 1mtr lengths....meh Also ordered a 1/2" hose bulkhead fitting from fleabay, this has a smoothish mushroom looking head (they are designed for below the water line of boats) that will fit inside the bend, the hose bit and threaded bit looks to long, but nothing that a hacksaw cannot fix if required, the hose will then just get jamed on the threaded bit up to the retaining nut Fingers crossed and the unsightly amount of hose clamps will be reduced down to 4 once all the parts arrive 
    • Oil change does not trigger code 21. Code 21 is for coilpacks primary side connection. You can try to clear the code with a battery disconnect, hold down the brake pedal to drain capacitors through the brake lights with the ignition on for 10-15 seconds before you reconnect the battery. I have seen R35 coil conversion permanently cause this code with no ill effects so it might be the resistance it wants to see isn't quite right on one or more coilpacks. Could be inside the ECU, could be the harness, could be a coil. You can test it all if you want or just ignore until the car actually starts misfiring.
    • I forgot you have a Nistune ECU. Use Nistune to do all the tests I mentioned instead of faffing with 30+ year old electrical connectors. You can read MAF volts off that too, there are reference values in the service manual to tell you roughly what it should be in different conditions.
    • No. I think it might be the AFM. Hence the use of the terms "swaptronics", which implies the use of swapping out electronics for the purpose of diagnosis. It's about the only way to prove that a small/niggling/whatever problem with an AFM or a CAS or similar is actually caused by that AFM/CAS/whatever. A known good item swapped in that still gives the same problem is likely to be caused somewhere else. They're all the same. Spraying AFMs with cleaner is an each way bet between cleaning it and f**king it.
    • Oh wow! This might actually work amazingly. Do you know the ratio of the diff? I was told the only thing you need to make sure of is if the front & rear diff ratios are the same. Ours is a 4.083 Thanks!
×
×
  • Create New...