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Misfiring r32 gts-t :(

runningmanz

By runningmanz,
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runningmanz Apprentice

runningmanz

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Hey guys,

my 92 R32 GTS-t has recently started misfiring intermittently. It can happen at any time and can usually be fixed by accelerating hard. Anyhow I just had my mechanic look at it and he has done the following:

-Replaced spark plugs

-Checked all the coils. Cleaned a faulty coil. (Said it was corroded a bit on one of the contacts, but said its fine now)

- Checked and cleaned the air flow meter contacts

Anyhow the car is running alot smoother, but a few days later the problem started up again. It loses power and sounds like a wrx...

HE told me to get it checked by an auto electrician. He thinks it may be something to do with the engine management??

Any ideas?? This is a pain in the $%#...

Cheers,

Jason.

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runningmanz Apprentice

runningmanz

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Quite possibly the engine management, i will find out on wednesday. My car is doing this also as my computer has blowen and is getting replaced on wednesday. I will give you the results as soon as i find out myself.

Just to add this problem seems to happens mostly when the car is at low revs or has just started. IE: today I was just cruising along doing about 80kmh going down a slight hill and all of a sudden it starts misfiring... I hit the accelerator hard and it comes good. Will be good to see what you come up with. I'm still leaning towards a dodgy AFM but I'm still not sure until I get everything else checked. Its a bit disconcerting not knowing if the car is going to lose power especially if you are in the middle of a busy intersection of something.

KIL.08S Collaborator

KIL.08S

Posted
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Ok, the problem is when you are just slightly accelerating, when you are just accelerating and the engine is making thet burbling noise. This is when the car will start missing. It is proberly your computer, at least that is what mine is. By accelerating hard you clean the carbon build up off the spark plugs that is put there by (i guess) overfueling caused by a bad computer tune.

Have you recentally had your altonator replaced / any other electrical work compleated that cound effect the current? when i had my altanator replaced the regulator was faulty and caused an increase in current as the car reved higher. The increase in current was sufficent enough to blow my lights and F-CON computer (resulting in one unhappy pappy). this is when the missing problem started.

So, check the current, check the sparks for excessive carbon and replace the problem because it will only get worse.

Hope i could help.

runningmanz Apprentice

runningmanz

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>So, check the current, check the sparks for excessive carbon and replace the ?>problem because it will only get worse.

>Hope i could help

Yeah its very strange. I have the car with an auto electrician today. So far he reckons he has checked all the electricals, ecu, afm etc and hasn't been able to find anything. He is going to give it a drive later and see if he can make the problem occur. It sucks when you have these sort of obscure problems.

I will mention what you guys have suggested and let you all know how it goes.

Thanks for the help so far.

Jason.

runningmanz Apprentice

runningmanz

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My car did that. It would missfire but if I accelarated hard it would be ok.

It was a worn out fuel pump, got another one for $100 and it was fine.

Hmm I suggested that to my mechanic but he told me the car would be misfiring nearly all the time if that was the problem? Was yours misfiring alot or just every now and then?

Chris32 Veteran

Chris32

Posted
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any of you guys thought it could be the air flow meter?

Thats what I'd look at, coils and plugs would see more of a misfire at high rpm, either fuel or airflow meter i would say?

Chris

runningmanz Apprentice

runningmanz

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Well the saga continues.... The guys at the auto electricians couldn't find anything wrong after testing it for a whole day, which included road testing it and running it hooked up to a computer for about 1/2 an hr. Bizarre.

At least the only charged me $33 considering how much time they spent on it. Anyhow the guy said to keep driving it and bring it back in when it starts to happen more often... Whats the bet it starts playing up on the way home....

Will drive it a bit more and see what happens then try and look at some of your other suggestions.. Just makes it hard when ya don't have the parts to swap out and test.

CHeers,

Jason.

Roy Grand Master

Roy

Posted
Posted
Well the saga continues.... The guys at the auto electricians couldn't find anything wrong after testing it for a whole day, which included road testing it and running it hooked up to a computer for about 1/2 an hr. Bizarre.

At least the only charged me $33 considering how much time they spent on it. Anyhow the guy said to keep driving it and bring it back in when it starts to happen more often... Whats the bet it starts playing up on the way home....

Will drive it a bit more and see what happens then try and look at some of your other suggestions.. Just makes it hard when ya don't have the parts to swap out and test.

CHeers,

Jason.

The WRX sound thing i know too well:( Driving along in my car it turned into a WRX...then came good and drove well for about 3 months. Then did it again checked all coil packs, cleaned them and it drove fine.

Then about 2 weeks later it started to happen regularly, and it was the coil pack as it was faulty long enough that i could actually identify it when checking the resistances. So in went a new coil pack and 10-12 months later the car is still going strong.

I doubt a weak fuel pump, dirty injector will make the car turn into a WRX, i would think its ignition related and if the plugs have been replaced and they are ok, then its a faulty coil pack. If it had a miss, hesitation then :confused: but if its sounding liek a WRX then im about 95% sure it is a coil pack.

thizzle Mentor

thizzle

Posted
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mine was doin same thing got some splitfire coils and now i hit 7 grand without 1 missfire same thing happened with my mate 2 stock coils are arc ing it sounds like

sparks jumpin from coil to coil not goin threw them to the plugs i was told.. you should be able to see the arc ing on the side of the coils like its melted if so thats your prob...

runningmanz Apprentice

runningmanz

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mine was doin same thing got some splitfire coils and now i hit 7 grand without 1 missfire same thing happened with my mate 2 stock coils are arc ing it sounds like

sparks jumpin from coil to coil not goin threw them to the plugs i was told.. you should be able to see the arc ing on the side of the coils like its melted if so thats your prob...

Yeah it started doing it again today. This time the car was cold. I just turned it on and as it was idling it started to misfire and lose power again. I couldn't even get rid of it all the way home no matter how many times i floored the accelerator. Then I left it for about 20 minutes, started it again and it was fine...until the next time. I can't believe the mechanic and the auto electrician haven't pinpointed the coils. I think I might have to just bite the bullet and get a new coil pack. Do you have to replace them all or can ya do the one that is faulty only?

runningmanz Apprentice

runningmanz

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every single one of mine was f**kd ...replace em all with some splitfires and you can kiss the missfire goodbye...

One other thing I have been wondering.....is it safe to drive around with it misfiring?? IE: Am i doing any permanent engine damage??

The car has just started misfiring alot more often today (nearly all the time) so I will be taking it back to the auto electrician tomorrow most likely if I can get it to keep playing up. Also bought some tools from the local super cheap auto so I will check the plug gaps and coils tonight if i get time .

Thanks for all the help guys.. will keep yas posted

Roy Grand Master

Roy

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Posted
get your mechanic to check your timing belt

if its one tooth out on either the exhaust or intake side then you get all sorts of rough idle issues...  

takes 5 seconds they just take the timing cover off and line it up!

cheers,

Waz

That would account for a small miss...but not running on 5 cylinders.

Based on what you said the about the other morning, cold engine, coming and going, then its a coil pack...the WRX sound and intermittent 5 cylinder thing is exactly what i had...not a small miss bit flat out not running on all 6 cylinders

runningmanz Apprentice

runningmanz

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That would account for a small miss...but not running on 5 cylinders.

Based on what you said the about the other morning, cold engine, coming and going, then its a coil pack...the WRX sound and intermittent 5 cylinder thing is exactly what i had...not a small miss bit flat out not running on all 6 cylinders

I still haven't had a chance yet to get in and check tthe coil packs yet or even check the spark plug gaps. The mechanic said only one of the coils was corroded which he said he cleaned so hopefully it is only that one that is playing up. Anyone know where to get a new or second hand coil pack at a reasonable price? I priced a new one from our local nissan dealer and it was $212!! The missus will hit the roof if I had to fork out for a new set at that price!!

Cheers,

Jason.

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