Rough idle, misfire and backfire

Sean ross

Sean ross

New Member
Hy guys. I know thia has probably been mentioned a million times on this page but i need help asap. Lastnight on a cruise my car after a few doses started idling real rough, stuttering under acceleration and backfires really loud. Sounds and smells like its flooding. Checked spark plugs and they were wet with fuel. Changed them and still no luck. My gtir had got basic mods like fmic, chip, 3" exhaust, pod filter. Nothing to major. Would appreciate a little help please. :(.
Cheers
 
B

BMCC

Member
Vacuum leaks from perished pipes? Are the fans running all the time, indicating the ECT temp sensor is disconnected causing it to over fuel?
What about the ignition side- how are the ignition leads, coil etc?
 
Sean ross

Sean ross

New Member
The fans dont run non stop. The coil pack and leads are all fairly new aftermarket too.


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PobodY

PobodY

Moderators
Staff member
BMCC said:
Vacuum leaks from perished pipes?
Click to expand...
I'd be looking for boost/vacuum leaks too. - Sometimes it's just a matter of disconnecting and reconnecting things to make sure they're giving a good seal.

What "chip" have you got; any chance that's malfunctioning?
 
PobodY

PobodY

Moderators
Staff member
Have you plugged it in to see if it's talking to your PC and/or if the map is ok?
 
Sean ross

Sean ross

New Member
Not yet will be on monday. We shall see wats the go then :/. Nervous times ahead haha


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Fast Guy

Fast Guy

Moderators
Staff member
Probably an air leak somewhere. Check for any split/loose pipes from the large ones in the intercooler pipe run and the small vacuum ones, also check the dump valve isn't leaking.
 
Fire & skill

Fire & skill

Vintage member
I had similar a few years back, turned out to be an intercooler hose had blown off, it looked like it was still on but was only just seating. I replaced all the clips with mikalor type after that. Hopefully it's just something simple, but check all your connections, even the little pipes. Where are you based?
 
Sean ross

Sean ross

New Member
Hy guys. Cars going in this week for its service anyways. Il ask them to plug her in and have a look. Shes got a bikirom in. Im based in perth western australia. Il quickly have a look at all the intercooler hosing and other connections. I unplugged the airflow meter and clean it with contact cleaner but still no luck.:( thanks again for all the info guys


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PobodY

PobodY

Moderators
Staff member
Fire & skill said:
I had similar a few years back, turned out to be an intercooler hose had blown off, it looked like it was still on but was only just seating. I replaced all the clips with mikalor type after that. Hopefully it's just something simple, but check all your connections, even the little pipes.
Click to expand...
Yeah, it doesn't take much; that's why I was suggesting disconnecting and reconnecting things.

Who's the Pulsar specialist in Perth? - I'm back in WA in February (then to the ACT for a wedding) and might see if I can pick some stuff up whilst I'm there.
 
Sean ross

Sean ross

New Member
Just checked all the hoses i could seems fine. All hoses are pretty new. Started her up and instantly u can smell fuel when it idles. When i try rev it just falls flat. sounds like its drowning


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Sean ross

Sean ross

New Member
Hi guys. So it turns out its my MAF thats stuffed. These are hard to find in perth. Any other ones a could use? S13 etc. NA pulsar?


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PobodY

PobodY

Moderators
Staff member
Possibly; do you have the code to change it to a Z32 MAF?

You might find someone over here has a spare they'd be willing to sell and ship to you.
 
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