Thanks on info. I check fuel pressure at idle and it is about 5.8 bar. My present pump is from bmw so I will put rst (or xr3i they are same? ) fuel pump when I found one.

 

i think pump is my problem i have noticed it has been making weird noises sounds like its got marbles in the pump , i went out yesterday and give it hell and the it started again , i am pretty sure there is a intermitent fault with the pump,

 

FFS mate, this has been going on far too long!!

Give me a ring and I'll have a quick look over it. I'll PM you my numbers.

 

scortpower & DazC: if you find where problem is please write it here because I have same problem.

 

have you checked the cam like i said 2 months ago?

 

no didint do it yet. my mechanics dont have time. here I we dont have tuners ih my city so I must wait him.

 

why dont you do it?

 

I dont know , I never do this, and I dont have tools. Moment key, dont have any lubes.

 

cheers daz , i just pm'ed you , will be in touch soon

 

did it start to do it when you fitted the group a coil.the thing is i have a mate with mint saph cossie and it ran mint,then started missing similar to yours if not the same .Well what is was, was the group a coil he put the polarity the wrong way round on the two spade connectors, the car still drove ok but when it was warm and he put fut down it started to boost and then backfired like hell,changed the polarity around to what it should be and it runs 100%,we just didnt think it was the coil as it was new,well worth looking at like i say the same symtoms as what we had.

 

its wired the black wire to the + and the two green to the -
thats right isnt it ?
it did it before i fitted the group A coil

 

Yes it is right.

 

I talk with scortpower and he said that maybe is pump problem. I remember this yesterday when my new rst came. when I get contact and fuel pump prime (on my old rst where I have problem), after about 15 second fuel pump will prime again when I turn key.

BUT on "new" rst , system hold pressure more than 30 second!

So that maybe mean that my pump is too weak and pressure falls to early?
or... leaking injector(s) ?

 

my fuel pump setup is wrong my gravity fed pump is trying to suck fuel up which is not what it is made for , i have ordered a uprated cossie pump for in the tank i will let you know when i have fitted it ,
thanks to dazc for his advice it should cure the missfire as it makes sense on what i have been told

 

have you tried colder plugs?

good luck!

 

i have tried 3 different sets of plugs , whats the best cold plug to get

 

I just come back from out, I change ignition coils (spark plugs cables) and guess what- I dont have missfires anymore! Car doesnt good better than before but no missfires, but when I flor it again same problems, pulling back or wont accelerate good.

 

already changed them , they were the first things i changed ,
i just need to get round to putting in this cossie pump i need to get a sender unit first as mine has been changed ,

 

I changed spark plug cables before few months and they are faulty now...
what is sender unit? something on fuel pump?

 

all sorted now bought a new intank cossie pump good for 350bhp and it runs like a dream now , well just need clutch doing
thanks again to dazc for his advice

 

See! Just needed the right person to look at it properly!!

 

Fuel pump solve problem? you can flor it and no missfires or hold back?

Then fuel pump is next.

 

yeh i can floor it now and it dont miss a beat , just been ragging it to liverpool and back and she is purring

 

Today I changed pump. I noticed little better going expecially in lower rpms.
car going better, but now I have poping from exhaust, I thing because of more fuel. and now metering flap is harder to push down then or old pump. and flap is still hard after 15 minutes when I turn off engine. I will go set mixure at load , but I am happy fow now

EDIT: changed injectors and dizzy. Set ignition timing to 12 deg with map hose disconnected. Now cars going much better.

 

Good news all round then!

 

certainly is , even better next week when my paddle cltuch is fitted then no slippage on boost

 

I have spare dizzy so I change it yesterday and go set ignition at 12 deg map hose off. After change fuel pump and set ignition no problems. I stay on line with golf 2 2.0 16V and we go same. I hope this is good for standard engine/boost.

 

Yes, probably about right for a standard car.

 

As you told me the fueling is fine on your wideband AFR and you checked and set the timing, and still had the issue's,
a new fuel pump, dissy or timing. should not of changed the way it run.

 

yes, logically there isnt reason for run beter. But it goes better. I set good afr with lambda but when I change fuel pump and injectors from donor car I noticed that car runs different. No more problem with hot start and metering head flap is staying hard to push after hours of standing. before flap will be out of pressure after 15 min after engine turn off. Like somewhere was loosing fuel pressure. And after I change dizzy car runs strange so I go set timing. After that , car runs much better.

 

What AFR meter are you running?

 

I really dont know. Isnt mine, it is from my mechanic. I thinking about this things which I changed and I remmember when I go set ignition to mechanic and after he set ignition he said that he uses some middle totth for seting it
then I told him that must use biggest mark. so maybe my first seting ignition was wrong because mechanics

 

so it might not even be a wideband? if its a crappy narrow band, thro it in the bin.

 

Mechanics said that he have wideband. Numbers on display are quick changing when I accelerating. I will visit him soon for check afr again, after I change fuel pump, injectors and dizzy.