OK guys, this one has p****d me right off. Filled up my ride Saturday night with petrol. Dumba** that I am, forgot to put filler cap back on. No problemo, straight to H*LF**DS for a replacement, nifty thing, plastic thing with a turnable centre thingy to turn and lock down nice 'n tight. Drove car to work as usual and from nowhere started to run like a pig. Best way to describe symptoms are what I would imagine dirty fuel might do or a blocked something causing fuel starvation. Garage saved my cap so went to collect on way home from work thinking maybe some technology in the factory fitted one. Some venting or breathing issue. Anyway, replaced the cap and guess what?.................. STILL RUNNING LIKE A PIG, symptoms as before. Never had a problem since the day I got it, all that's changed is that for a short while (60 miles) car had a none standard filler cap. I'm stumped. Can anyone shed any light?

im throwing shit into the wind here but could you have possibly sucked in air through the fuel lines due to the tank being unpressurised. them halfords push in jobbies don't seem to alow the tank to pressurise properly. someone wil come along and correct my stupid comment im sure.

you sure you put unleaded in the car :wack:

 

you need to be more specific to when you say run like a pig PMSL

Thanks for the headsup greg. I put unleaded fuel into the petrol tank. £40.23 from the only garage I buy my fuel from ( I can supply address details if required ), and I did not get a VAT receipt. MY CAR STILL RUNS LIKE A PIG !!!!! There you go Greg, what do you advise? HellRaiser and myself are all eyes.

Thanks for the headsup greg. I put unleaded fuel into the petrol tank. £40.23 from the only garage I buy my fuel from ( I can supply address details if required ), and I did not get a VAT receipt. MY CAR STILL RUNS LIKE A PIG !!!!! There you go Greg, what do you advise? HellRaiser and myself are all eyes.

 

think he ment what does it do ie hesitate, dont rev past 3k.,idle rough etc etc

Yeah, thats it HR. Hesitates?, yes, safe say it hesitates. Didn't look at the rev counter tho', couldn't see it thru the tears.

Yeah, thats it HR. Hesitates?, yes, safe say it hesitates. Didn't look at the rev counter tho', couldn't see it thru the tears.

 

sorry for the pedantic moment :wack: , problem is hesitation can be many things, from a loose coil pack to a vaccum leak so you need to go over the engine bay and see if you find anything a miss, best thing is to search hesitation on the search facility top of the page, even a bad batch of fuel can cause hesitation, and its funny how this has happended since you filled up? yes the fuel pressure is released when you undo the cap hence the hiss you get,i wouls see how it is tommorrow and repost here perhaps after another drive, you may then have a more specific problem

Yeah, thats it HR. Hesitates?, yes, safe say it hesitates. Didn't look at the rev counter tho', couldn't see it thru the tears.

ok i still go with my previous comment an air lock in the fuel lines. :wack:

Thanks Greg, thanks HR. Been bothering me all night. Just took it for a ZIPPPP!!!! up the A38. When I give it a footfull it goes like I know it can. Dropped it in to cruise control at 72 mph to let it run steady, low gear 2500 revs, overdrive on. Very, very lumpy. Think of the beginning of the song Blue Moon........

 

Ba-Baba-ba-a-Ba-Baba-ba. Get the picture?

Thanks Greg, thanks HR. Been bothering me all night. Just took it for a ZIPPPP!!!! up the A38. When I give it a footfull it goes like I know it can. Dropped it in to cruise control at 72 mph to let it run steady, low gear 2500 revs, overdrive on. Very, very lumpy. Think of the beginning of the song Blue Moon........

 

Ba-Baba-ba-a-Ba-Baba-ba. Get the picture?

loose connectors possibly. when you get some time go round all of the coil pack connectors and the injector connectors and give them a good clean and make sure they are firmly pushed on.any green corrosion on the pins remove with contact cleaner and an old toothbrush.

try that then let us know the results.

oh be careful as they are getting quite brittle by now so slow and steady wins the race ok. use a pair of long nose pliers to catch the clip retaining wire.

Will do HR, cheers. Newbie to the Z myself (Febuary), so forgive the naivity. Do these things go from good to bad overnight?

Will do HR, cheers. Newbie to the Z myself (Febuary), so forgive the naivity. Do these things go from good to bad overnight?

can do. i had it on mine once. drive to work fine. drove home missfiring the works. i wiggled the injector connectors and one made the engine note change on idle. unclipped it and it was green .so i decided to clean all of them. the coil pack connectors can work loose if they have a broken plastic clip.

First thing to check in the AM then. Thanks for the advice bud. Liking the way your'e keeping your ride unmolested. Take a look at me in the RIDES section of the site. I think you'll find we have something in common.

First thing to check in the AM then. Thanks for the advice bud. Liking the way your'e keeping your ride unmolested. Take a look at me in the RIDES section of the site. I think you'll find we have something in common.

cheers buddy and good luck. let us know how it pans out. :dance:

P.S. Just wanted to say, here is an example of the benefits of using the same filling station for your thirsty hobby. They knew the gas cap was mine so they put it behind the counter as they now know that I get to say hi every coupla days thanks to my thirsty distraction. Y'see, there are decent people out there.

P.S. Just wanted to say, here is an example of the benefits of using the same filling station for your thirsty hobby. They knew the gas cap was mine so they put it behind the counter as they now know that I get to say hi every coupla days thanks to my thirsty distraction. Y'see, there are decent people out there.

 

i like your humour, thirsty distraction :p

:dance: HellRaiser, this ones for you.

Yippee !!! Problem solved. Bl***y HKS Iridium Plugs. One of 'em had not performed as required and went all black 'n crispy lookin'. Out with 'em. Now replaced with a new set of good 'ole NGK Platinum's. Had it explained that the Iridium plugs only benefit long term, high revving, high temperature engine's. After all, the S40i's are racecar technology. Personally, I never abuse my now 15 year old engine (well, only when I have to, snigger. Had a right smirk at a shiney Pug 607 driver earlier. Will they never learn?) So, I don't really need the super high spec plugs. Running like a swiss watch again. Thankyou Herbie and Andy for all your advice and patience. Horses for courses I guess. If memory serves, wasn't there a plug poll?

:dance: HellRaiser, this ones for you.

Yippee !!! Problem solved. Bl***y HKS Iridium Plugs. One of 'em had not performed as required and went all black 'n crispy lookin'. Out with 'em. Now replaced with a new set of good 'ole NGK Platinum's. Had it explained that the Iridium plugs only benefit long term, high revving, high temperature engine's. After all, the S40i's are racecar technology. Personally, I never abuse my now 15 year old engine (well, only when I have to, snigger. Had a right smirk at a shiney Pug 607 driver earlier. Will they never learn?) So, I don't really need the super high spec plugs. Running like a swiss watch again. Thankyou Herbie and Andy for all your advice and patience. Horses for courses I guess. If memory serves, wasn't there a plug poll?

glad you got it sorted matey i was wrong after all doh! was even simpler then i thought. happy z'ing buddy :dance:

Same to you mate. Cheers.

Personally, I never abuse my now 15 year old engine

Why are are you using normal unleaded in it then? :p

Always open to quality advice Glenn,. What would you recommend?

Always open to quality advice Glenn,. What would you recommend?

optimax or bp ultimate :cool:

Alway as above or at very least Esso super unleaded Octane 97

 

When over the channel you put Shell and Esso 100 ron.

I've got Denso Iridiums in my stock Auto TT and never ever had a problem - perhaps you just had a duff plug?

I see Shell Optimax is no longer Shell Optimax! It has now been changed to Shell "V Power", it has gone up from 97 to 99 octane!

Always open to quality advice Glenn,. What would you recommend?

As Greg says optimax (now called V Power) or bp ultimate. These cars are designed to run on these fuels as the normal fuel in Japan is equivalent if not higher than our super unleaded :)