hey guys just wanted to pick your brains , i got the engine in zed plumbed it in and it runs as sweet as a nut......however i took it for a spin the other day and when i booted it up a hill it hit bout 5500rpm then backfired with some impressive pops but then appeared to cut out and lose power. it came back to life at about 3000 and off again till it hit 5500 then same thing. a friend suggested a fuel issue maybe filter does that sound about right?

Is it an import with limiter still in place(112mph)

yes its also a turbo!

could that be causing problems? whats easiest way to remove limiter?

JD Chip;) or there are others that can oblige on here.

it wasnt on the limiter when it popped though was only in second its an auto so at first i though box issues but not convinced think it could be fuel. anyone come across this themselves?

It may be fuel,may be PTU,or MAF,or coil packs.

Is it allways at 5500 rpm when it happens.

Don't get confused between the Rev Limiter and the Speed Limiter.

Rev Limiter is the same as any other car, but the speed limiter is set around 112mph, it's a Japanese thing, that can easily be removed with some aftermarket devices, or have your ECU socketed and a chip put in, a fairly cheap job, and as stated above a few peeps here do it, just place a request thread up to see who is still offering it.

 

Ofcourse it could be something else, depending on your speed when it did it if you were nowhere near 112 mph! The popping could be unburnt fuel within the exhuast igniting in the Cat, this could be caursed by you PTU breaking down, thus stopping the spark on one or more cylinders. It could also be a dodgy Coil-Pack doing the same thing.

 

Personally I'd opt for a unburnt fuel problem, as the speed limiter should perform smoothly, and not give a popping sound.

 

HTH

Dave

Poppin could be either over fueling or timing normaly

My old s13 did this, turned out to be fuel cut..till i got it chipped then blew it up shortly after

My old s13 did this, turned out to be fuel cut..till i got it chipped then blew it up shortly after

 

That's encouraging :)

That's encouraging :)

:D My own fault realy as i had no form of boost control and no boost gauge:wack:

With increased boost you need to reduce your spark plug gap to around 0.8mm

im almost certain its a spark issue as my car does exactly same thing and i have a coilpack knackered with the other 5 with suspect connections if i rev it it pops now and then .and cat heat light comes on meanig fuel blowing up in exaust not good as the dust from the cat can fubar the turbo seals locate which pot is not sparking swap coil packs around to confirm broken coil pack or connection ..

remember this is only a suggestion dont go mad like i did pulling of all tghe connectors and end up with a bag of coilpack connection plugs in bits....lol

ive also been told it could be a plug more likly to be some crasppy connector though..

Cheers for that. I'm gonna replace fuel filter cos it's been a while but I'll check coil packs aswell defo not plugs though as I replaced them all when I did engine rebuild. Cheers for the advice gents

Check your injector connectors too.

Cheers for that. I'm gonna replace fuel filter cos it's been a while but I'll check coil packs aswell defo not plugs though as I replaced them all when I did engine rebuild. Cheers for the advice gents

 

But what gap did you set them at. Standard 1.1mm or reduced to 0.8mm ????