lads

Ive been trying to sure a miss fire and erratic idle

so far ive replaced the dizzy cap, rotor arm, all leads, and all plugs, also yesterday I replaced the inlet manifold and plenum gaskets with commetic gaskets.

symptoms are still sigh the same

oh and its not the ISCV ive tried 3 different valves now

when you remove the iscv lead it idles fine

I have an erratic idle, sometimes hunts up and down and even when hot it rests at 1500rpm, I can blip the throttle and it will come down to 1000rpm

also she is slow coming off the throttle when driving

and in first and second gear if I floor it i get a huge miss fire and a bang and a cloud of fuel out the back

its 100% driving well and although I feel slightly down on power, when throttle is fed in slowly in 1st and second theres no problem, the miss happens about 4000rpm

its not due to low fuel level
ive also checked all the main engine earths and grounds that I can find

also ive altered the Co level on the L8 ecu which I have, the car has stage 3 mods, 3 bar etc

really toiling now any more clues gents, ive got new temp sensors here thats my next job

would phase sensor gap cause this ?

regards Glen

 

Call me whilst im brewin.

 

Hi...you will have an air leak...check injectors seals are not leaking.

 

and check the gasket around intake plenum , normally hear a hiss with a bit of hose pipe to ur ear , it happened on mine and caused allsorts of weird shit

 

bbigman2000, you know your going to get to the bottom of it now,, stus the man who can

 

shit im just in, I tried disconnecting the ecu and letting it relearn the values that was a waste of time aswell

stu what time you free il ring you bud

rock your world I had all the injectors out yesterday and also replaced the plenum gasket with a cometic, I wonder if one of the injector seals are leaking, how can I tell ? Ive listened for hissing but cant hear anything, is there anything I can put on the o rings to make them seal better ?

cheers gareth

 

Call me at 25past

 

Mate...see if you can see any wetness around the injector at the firing end...you dont have to get any hissing....another good way of telling is rip the plugs out and see if one is running leaner than the others...obviously this is a potensial engine destroyer running lean via an air leak

 

will do stu

rock, cheers mate, there is some wetness around the first injector I noticed that yesterday also your right i noticed that number 1 plug was on the lean side, I reckon you maybe onto something here, il ring stu then il invesigate that further, is there any way of sealing it temporarily ?

cheers lads

 

Mate..thats your problem...you need a new seal on it!

 

ok cheers lads, had the inejctors out, again thats not my problem

Ive adjusted the base idle as per my chat with stu

also I checked the rear earth on the block, not 100% sure but I think it may have been a dodgy wire on there, its to tricky to get at but I fiddled about with them a bit and the miss fire seems to be gone, to check I took the car out and just leathered it in first and second and no miss

ive still got idle issues but again as per stu's advice, I think its my throttle cable OR the throttle butterfly is a bit sticky, il strip that out tmrw and clean out the inlet and make sure its moving ok, and il try and adjust the cable

I checked the TPS and its the correct part number so must be the right one

will update tmrw thank you stu, TOP bloke
and cheers rock top dude

 

Good luck mate,you seem to be plagued by issues with the Cos at the mo
Mat

 

cheers bud, yeh, once ive got a new turbo and the tappets done im gonna run down to stu's for the day let him sort it out, il see if he'll let me troll the net for the day !!

 

is the TPS ajusted to the middle of its elongated holes ?

 

will check today mate

p.s the miss fire was definitley poor earth between the plenum chamber and the 2 wires on the block

idle problem still to be resolved will check tps postion mate

 

There is no earth between the block and the plenum
Its probably the ecu earths you are playing with.

Have you sorted those plugs? I fail to believe the car doesnt missfire as they were

 

bbigman, here is some advice... I reckon its pretty good as well

Firstly check your diary to see if you have any free long weekends coming up, then call stu. Book the car in on the friday, drive down on the Thursday night with the missus and spend a lovely relaxing weekend in Sunny/rainy Blackpool (or bring a mate and chase northern birds around for a few nights) and then go home monday.

Either way that still give stu 2 full days to go over the car with a fine tooth comb and get the whole thing working as it should be. It will be faster, more reliable, MUCH more enjoyable and less stressful and probably cheaper in the long run

 

yeh mate, I gapped them at .65 I made amistake on the phone to you, they were infact already gapped at .65

thats correct those are the two wires that were dodgy, ive messed about with them and it seems to have cured the misfire

are there any other earths on the block to the chassis etc ? where are they lads

porkie

yes mate I will but its a long way and between optimax and time off work etc, its just a tough one, but if I dont sort it shortly im gonna first of all put my fist through the windscreen and then im gonna set fire to it.

 

Join the AA. next time it has a 'problem' have the car trailored to Stu.... fly down and pick it up when done mate

 

not everyone owns a private jet Lee

 

Best advice m8 take the time off get it sorted

 

its not a jet