A bit of a misfire between 2-3K rpm

Ah fuck um lol

Haha fair enough mate, just thought I would warn you incase you have mardy neighbours

Dizzy cap .... check for cracks ... and moisture inside of it ... look at the contacts see if the look burnt or corrosion on them   get a bit of sandpaper  clean them up ... check the rotor arm similar thing look at the metal piece on the end clean up if needed ...

nomad wrote:Dizzy cap .... check for cracks ... and moisture inside of it ... look at the contacts see if the look burnt or corrosion on them   get a bit of sandpaper  clean them up ... check the rotor arm similar thing look at the metal piece on the end clean up if needed ...

Cheers mate

Today I've removed any unnecessary vaccum sources such as boost controllers and gauges etc. I just have connected the FPR and the carbon canister, plus the BOV because I still haven't found anything good enough to plug up the BOV hole, and I still have the same issue.

I have just noticed though that when I pump the break pedal repeatedly the AFR's were leaning out to about 16-17! Also my breaks feel shit, they stop you but they don't feel like they would lock up or stop you in an emergency so now I'm thinking it must be the breaks or a vac leak to the breaks? Unless it could still be the BOV because I haven't tried removing that yet.

I've made a little vid so you can see what I'm talking about.

First I hold the revs in the spot were I usually misses but it seems ok then I pump the hell out of the brake pedal and the AFR's lean out to the point were the car about stalls!

I then go to turn it off but instead decide to rev It up once more to that spot above 2k rpm and this time it starts to miss slightly

Here's the vid. Sorry about quality it's my first YouTube vid lol

Ps the boost gauge dosent work because I have disconnected it

Do you have a miss fire aswell. Where is your sensor for afr how old and when did you last recalibrate it ?

Yes I do have a miss fire, you can't really hear it in the vid but it's there wen i rev it up after I pump the brakes.

My AFR gauge came with the car so could be completely inaccurate for all I know but it does clearly shows that the car is leaning out considerably when I pump the breaks, to the point were it felt as though the engine was about to stall

I could be wrong but i think its normal for it to lean out when braking as your introducing air into the inlet ....

Well i thought it was supposed to lean out a bit but not to the point of about stalling the car, even if you you pump the pedal?

The reason I'm suspicious of my breaks is because they are shocking, they wouldn't lock up if you stamped on them. I have noticed however the breaks work a lot better when on over run or engine breaking or what ever you call it.
If I brake at idle with the clutch in they are crap, if I let the engine brake and press the brakes wile the engine is decelerating they feel pretty normal

I think something isn't right with the brakes, I'm not sure if leaning out like that when you pump the pedal is normal or not but I think I could stall the car doing it if I wanted to which I thought was not normal and like I say, my brakes are not right

You have a airleak somewhere by the sounds of it. Buy or make a pressure tester or check them manually.  intercooler pipes vacume pipes etc

I have just noticed something when playing about with the car today, the plug on the wiring loom for the injector on cyl 1 is partially broken and does not clip on as well as the other 3.
That could be the cause of my miss fire and maybe even the reason my old engine went because it blew a ring land on cylinder 1! And I was on a bumpy back lane so it could of knocked the injector pug off causing det in that cylinder.

I need to find a way to secure this plug on the injector and see what she's like then, even if that's not my issue it still needs securing better somehow

Get a paper clip and bend it into shape mate cheapest and easiest way to replace missing clips i had do it to mine as had them missing ...

It's got the clip on it mate but part of the plastic plug has snapped on one side. I've use a bit of that sticky black butyl tape stuff to stick it down with and bent the clip a bit so it clicks in properly. Tried the car and I still have a bit of a miss   lol
For now I'll carry on with the process of elimination, I'm not going out in it until I have it running spot on, not after what happened with my last engine

Cant 100% tell from the vid but i had /proberly still have lol a simular type miss that i could never quite solve.

Mine was more connected with my msd ignition setup i think but even in the stock setup my car was always abit suspect to ignition woes.

Anyhow its been a long time and i wont go into it to much as i cant remember it all lol but my surgestion would be to gap either you old plugs or you current ones to around 1mm or more and see if it still does it.

You may find you will get spark blow out on boost with them gapped this much but if its anything like my car was you may also find that small miss is gone.

Dont really help your cause as i dont know the answer why it does it lol but its worth trying to see if it is ignition related.

Good idea mate, I have just put new plugs in today because I had some lieing around but they were gapped to 0.7 same as the old ones so I will try a larger gap.

The more I investigate it though the more I'm thinking it's a lean miss fire, ie fuel related, because you can almost see the lean spikes in the AFR gauge, pretty much every time I get that little miss fire I can watch the AFR gauge get a few points leaner for a split second.
I'm not ruling out a vac leak though because there's all the bits at the back of the plenum I cant get to

have you checked all your fuel lines etc, specifically the rubber ones on top of the fuel tank, also maybe worth checking the wiring to your fuel pump, alot of people run a 2nd wire from battery to fuel pump as the wiring is old and can cause problems.

just a suggestion

Thanks mate, good suggestions and I'll look into it, I had thought about the fuel pump wiring because I have heard of the wiring mod for the pump and ive never looked to see if it's been done on my R.
I need to find my multimeter because it's gone mising, think I left it in a mates car and he's sold it now oh well, it was only a cheepo malin one, I'll have to buy another because it would come in handy lol I just want to check over as much as I can before giving in and paying someone else to look at it

im just trying to single out the issues i was having with a similar problems, my fuel pipes were f*cked and other things i tried, new leads, plugs, dizzy, maf x 3, service fuel filter, dont have the issue after having the walbro fitted and re wired and the fuel hoses replaced.

My car does have a Walbro pump fitted but I'm not sure when it was fitted and I have heard there are fakes going around so I wouldn't know if it was genuine or not.
I have a new fuel filter, came in the post today so I will have to fit that, any tips for fitting the fuel filter? I've never done one before and im guessing fuel will just piss everywhere if I just pull the pipes off lol

Pull the fuel pump relay out whilst the engine is idling and allow it to stall. That way you won't get petrol everywhere.

just a thought i had a similar problem with mine at the same rpm speed it ended up being the air flow meter, dont know if you've tried it.

No I haven't tried the airflow meter yet but I had suspected it. I'll have to try replacing it with another one and see if it helps

Thought you'd have come for mine by now?