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Too Much Fuel Over The Back Of My Car!

msnismo

By msnismo,
in Engines & Forced Induction

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msnismo Grand Master

msnismo

Posted
Posted

Hey guys,

Just a quick question! Recently installed my FMIC and now seem to have excessive unburnt fuel attached to the back of my car - only noticed cause its all over my number plate!

Should I have reset my ECU after the FMIC was installed? Will this help or will I need to check the AFM as it was disturbed during the install?

Cheers,

Anna

msnismo Grand Master

msnismo

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Will trying resetting the ECU tonight.

Also, when I got the car back after the FMIC was installed there was a ticking noise at idle...not sure if its there whilst driving as I can't here it over the car (noise is louder when bonnet is down too - makes it hard to pinpoint when bonnet is up!). Just wondering if perhaps maybe they stuffed up the vacuum lines when they installed the FMIC.

I had an apexi plumback BOV that was removed and now I am running the stock BOV - only thing was that both BOV's were running together. Just wondering if possibly a vacuum leak could be causing the tick and the car to run rich?

msnismo Grand Master

msnismo

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Ticking is not the fan - checked that. Basically the FMIC was installed and all seemed fine till there was a puddle of oil on the ground. Discovered that the oil cooler core had been cracked when they remounted it.

Few days later - new oil cooler installed and oil change done - when I picked it up the ticking noise was there! then noticed car was running really rich. Not sure if its a coincidence or all related!

Ticking sound seems to be coming more from the bottom end of the engine than the top. Really don't want to take the car back to the workshop as it seems to come back with something else wrong every time I go there.

All this from a FMIC being installed .... aaarrggh

mad082 Grand Master

mad082

Posted
Posted

could also be a fan belt has started to tear. i had that problem. at idle you could hear it tick, but went away a bit with some more revs. the backing of the belt was coming off and i had been too lazy to change it. once it started doing that i changed it.

msnismo Grand Master

msnismo

Posted
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Yep constant tick... can't hear it once underload, but could still be there. Doesn't seem to get more frequent with revs... Not sure what side its coming from as it's only really loud with the bonnet closed.

msnismo Grand Master

msnismo

Posted
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could also be a fan belt has started to tear. i had that problem. at idle you could hear it tick, but went away a bit with some more revs. the backing of the belt was coming off and i had been too lazy to change it. once it started doing that i changed it.

hmm will check that also tonight! Just bugging the crap out of me cos the car was quiet as a mouse until the oil change and oil cooler being replaced!

Thanks!

DJ Brave Experienced

DJ Brave

Posted
Posted
hmm will check that also tonight! Just bugging the crap out of me cos the car was quiet as a mouse until the oil change and oil cooler being replaced!

Thanks!

I remember first lifting the bonnet on a skyline with 40,000kms on the clock and thought that the lifters were stuffed but it was just the injectors. But i have noticed that the injectors are really loud on RB motors. If it is running rich all of a sudden it may be just the injectors are working harder to keep up with more air flow going in the motor with your new FMIC or something controlling your mixture is stuffed! Hows your fuel consumption per tank? How many kms are you getting now??

You could always just lighten your right foot!!! :angry::)

msnismo Grand Master

msnismo

Posted
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I remember first lifting the bonnet on a skyline with 40,000kms on the clock and thought that the lifters were stuffed but it was just the injectors. But i have noticed that the injectors are really loud on RB motors. If it is running rich all of a sudden it may be just the injectors are working harder to keep up with more air flow going in the motor with your new FMIC or something controlling your mixture is stuffed! Hows your fuel consumption per tank? How many kms are you getting now??

You could always just lighten your right foot!!! :angry::)

Are you implying I drive with a heavy foot Wayne? Shhhh dont tell anyone!

Car was quiet until they stuffed around with the oil cooler and the oil change. They put a stupid coopers filter on it so I have bought a Ryco to replace it and I putting new oil in again!. The FMIC had been in for a few days without any issues and I got 420km out of a tank.

Since the oil and cooler I have been getting 370km out of a tank. Definitely not injectors as the sound is towards the bottom of the car. Dad is looking at it tonight so hopefully will have an answer!

DJ Brave Experienced

DJ Brave

Posted
Posted (edited)

Fifty kms difference to a tank sucks!!! Hope you can get that fixed, Kasey and I both get around 460-470kms to a tank. I will be interested to see if my fuel consumption changes when my FMIC is fitted, hope it aint that bad!! :):(:(:angry:

Edited by DJ Brave
msnismo Grand Master

msnismo

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Really dont think its the FMIC .... Car only started playing up after the Oil change and oil cooler replacement... Just though it might have been a combination of things....

And I want photos when your FMIC is in!

RedDrifter Experienced

RedDrifter

Posted
Posted (edited)

OK.

1) The tick is probs just the injectors as most rb's are loud as mention before. (you should here my 550cc RX7 injectors,twice as loud as the stockers were)

2) The excess fuel could be just because you are now pushing more air into the motor due to the intercooler upgrade which was also mentions above.

3) If you have a boost leak your car on boost will runn very rich as the ecu will think there is more air going into the motor than there really is.

So your best bet would be to check for leaks 1st then if none are found do an error check on the ecu and see how that goes. Code 55 is all clrear.

Hope this helps.

:angry:

Edited by RedDrifter
msnismo Grand Master

msnismo

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Thanks for the ideas guys... just went and picked up the car with new tyres and the Tick is now a different sound.... starting to think that when they hosed down the engine after the oil cooler was changed that possibly affected one of the bearings in the pulleys or the belts.... the tick is not as loud now and the frequency keeps changing but definitely sounds like coming from the bottom pulley...

Will get the stethoscope thingy out tonight and have a listen... well dad will anyways! As for the fuel... dads taking it to work tomorrow to see what codes get thrown up...

Cheers,

Anna

msnismo Grand Master

msnismo

Posted
  • Author
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fuel problem solved... was the way the workshop reconnected the vacuum lines .... :)

Ticking noise ended up being the pulley. Off to Nissan to get another!

Thanks for all the input guys!

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