Why is it that sometimes more often than not its when my cars first being used/ it stinks of petrol? i now its yet to be set up cas ive put a hudge fmic on her but it was straped up to a consult i beleave/ hope , and everything is as it should be , like revs, most of the time apart from the first mile when at the fisrt junction the revs bounce a little around the 6k to the 7.5 k but thats when could and ive just got to the first junction, after witch the revs sit were they should do. the heater comes on within the fisrt mile and the temp is were it should be before i get to the secound mile. but in any time after in the day i can smell a strong smell of petol and even have strangers comming to me when ive poped into a shop, saying sorry mate can you smell petrol. there is no leakes as far as i can tell, and apart from the drinking to much petrol of witch i put down to me putting the fmic on and not being over to Noels place yet. Am i overlooking somthing? is something need replacing? or is it just because i need a remap? oh it also has a very large k a N air filter straped to the maff as well? thanks guys/ girls.

Has it had carbon canister delete??

Possibly a pipe leaking, sometimes very difficult to see, have a good feel around all fuel pipes for traces of petrol.

sounds like a leak. If anything, the FMIC if it performs better than the SMIC will make it leaner, not richer...

Has it had carbon canister delete??

 

if you mean that black tin size thing in the front of car nearside near under the lights then now but the lid dont fit tight anymore can i just take of and close the pipe work that gose to that?

Vapour leaks are very hard to spot and will always be worse when the engine is cold started due to increase in fuel rail pressure to aid starting, cold fuel and cold pipes.

 

Once warmed up the issue normally goes away, using the heater will draw air from the scuttle panels area which is very close to the source of the problem, check each and every fuel line worm drive, often they will look tight but will turn a half turn or more, particular attention to the rubber pipe link at the front of the rail under the throttle cover, sometimes pipes will need changing just because they are old and the rubber has aged.

 

Jeff TT

cheers will take throttle cover off and have a look and check else were also want to do carbon canister deleate, cant find one. anyone got a link please the sun is out and i want to do somthing constructive today?

cheers will take throttle cover off and have a look and check else were also want to do carbon canister deleate, cant find one. anyone got a link please the sun is out and i want to do somthing constructive today?

 

 

You need to check for leaks when the engine is cold and first start of the day, remove the throttle cover first, have a torch and screw drivers ready etc. as often the window to see the issue is short.

 

Jeff TT

and courtesy of Jeff...

 

http://www.300zx.co.uk/forums/showthread.php?140784-Fuel-pipe-tips&highlight=fuel

 

gosh that Tech section is good... :D

You need to check for leaks when the engine is cold and first start of the day, remove the throttle cover first, have a torch and screw drivers ready etc. as often the window to see the issue is short.

 

Jeff TT

 

thanks for your input on this one Jeff as its been very helpful and although not finished the job because of childrens school run ect ive found the pfrob i think , thanks to your advice.

Right i had a good look around with a cold car not used today and turned on the ignition to get the fuel pressure thats norm there when im of up the road. coulnt find anything, but still stunk of fuel so carefully folowed the smell to the throttle cover. took it of and right up the back umoung all the little fule pipes one of was almost not done up at all and was compleatly wet with fuel around that area. right near the back injector treis to tighten up but really need to take of the balence pipe and move out of the way, whilst there i had a good look around and found that were the fuel has dampend the area around first injector plug and were there is some sealant still there the plugs are relatively loose and have green on the tiny plugs that are bearly on the top of the injector. so rather than bodge it iv decided ill take of the balance bar tomorow clean up that area and those little injector wire plugs reseal with sealant and retight up and check all those surrounding plugs.

This then should stop the smell of petrol and make her run sweater when cold espeaslly when and somtimes a tad lumpy. that should also possibly save a bit of fuel especially with a cylinder not working 100 percent all the time. i recon if i was to take out that plug it would be very wet. hope this fixes all then tiny gremlins, thanks for your advice guys and pics to follow.

heres the culprit.

.

and you can see which one it is, its diff to get to prop. And you can see the other leads under that silicon stuff that are not home properly. thus lumpy running sometimes.

Ah this could well be my problem too then as my problem sounds exactly the same as your shall have a look see at mine too cheers for highlighting this ?

 

Sent from my RM-914_eu_euro1_327 using Tapatalk

The link below may help if anyone needs to change the front fuel pipe that looks impossible but is do-able, its a tech thread I did from some years back.

 

Jeff TT

 

http://www.300zx.co.uk/forums/showthread.php?140784-Fuel-pipe-tips&highlight=fuel+pipe

The link below may help if anyone needs to change the front fuel pipe that looks impossible but is do-able, its a tech thread I did from some years back.

 

Jeff TT

 

http://www.300zx.co.uk/forums/showthread.php?140784-Fuel-pipe-tips&highlight=fuel+pipe

 

Genius...... Nice post Jeff...:bow:

Genius...... Nice post Jeff...:bow:

+1 excellent tech thread!

One question though, how do you release the pressure from the fuel rail? As when I changed the rear hose (same as spin doctors pic), I got covered in what seemed like a gallon of the liquid gold.

+1 excellent tech thread!

One question though, how do you release the pressure from the fuel rail? As when I changed the rear hose (same as spin doctors pic), I got covered in what seemed like a gallon of the liquid gold.

 

Usually after an overnight shut down most of the pressure will have gone.

 

Jeff TT

That must have been what I did wrong then as I did it after I drove home from work.

Although, am going to have to do it again as its started to leak again, only did it just before Christmas with new hose and clips.

That must have been what I did wrong then as I did it after I drove home from work.

Although, am going to have to do it again as its started to leak again, only did it just before Christmas with new hose and clips.

 

You did use fuel pipe designed for fuel injection? normal fuel pipe is not re-inforced and will leak soon again, if not ask for fuel injection suitable pipe.

 

Jeff

What I/D size pipe do you need as mine need doing? I'm being told 6mm by some and 8mm by others.

I hope it was the right stuff, the bloke at the hydrolics shop said it was.

+1 excellent tech thread!

One question though, how do you release the pressure from the fuel rail? As when I changed the rear hose (same as spin doctors pic), I got covered in what seemed like a gallon of the liquid gold.

 

IVE taken out the fuel fuse taken of the battery just incase i manage to short a wire out . dont want any sparks, undid the petrol cap to releave a bit of pressure and left it overnight so here i go.

here we are the dirty connectors that were very loose and dirty.

and heres the plug now nice and clean.

now all back together and had a quick run up the road, It was like driving a different car, almost like i gained a cylinder and quite possiblly have. felt so much crisper quicker and not lumpey and no smell of fuel, . cheers guys.

Glad you got it sorted bud.....:thumbup:

Thanks m8