Ok here goes,
My cars hasnt been driven since new years 2007 (another story) i recently booked it in to have a pink slip and a service at mitsubishi in town.

The mechanic rang me up last thursday and said its missing a bit and a tad stutterish. i thought it'd b nothing but the flat spot from the pod filter. anyways i went down there today to see how the progress was going and to see how long before i get it back and he was explaining that its getting some crazy air ratio readings and has a lean out which is why its really missing/stuttering down low. So i asked if i could take it for a drive to see what it really feels like (havent driven it in 2 months)

Took it for a run but it only really feels like the flat spot + something else. So im asking could it b that the fuels gone bad and its just adding to the flat spot? its close to empty (the tank) and probably has been for over 2 months (sitting in the smash repairs). Anyway im putting the stock airbox in and a k&n panel filter and the mechanic is flushing the fuel lines and putting a new fuel filter in, then im going to be filling it up with premium and taking it for a good blat tomoz. Any ideas and comments would be much appreciated, also, should i reset the computer? how do i go about that? discon the battery? leave for how long? etc etc.

thanks in advance guys.
Jim

8 views and noones got a clue? Come on guys ffs, i gotta drive this car to Port Douglas before the weeks out and i need reasurance that its nothing big...

i hope he doesnt charge you to flush the fuel lines. as the sec u turn the key it will flush it anyway

yes the fuel may be stale run some new fuel throught it before you do anything

also it is commin for the leads to fail due to oil leaking around the spark plug tubes
this can be checked by a scope or removal of the plenuim

Thanks for the reply mate, I had the 105K major service not long ago and im pretty sure they did the leads then, im not to worried about it, the flat spot should basically go as soon as i put the stock airbox etc back on. A good dose of premium and a good blat out a country road should do wonders. Should i reset the computer or anything after i put the airbox on? i heard the cpu actually re-learns all the airflow readings etc. Is this true or am i smoking to much?:bowrofl:

fuel wouldnt get stale after only 2 months, youll be waiting 6+ months before it turns to crap.

fuel wouldnt get stale after only 2 months, youll be waiting 6+ months before it turns to crap.


how old was the fuel before he put it in the tank???

Take the positive terminal off the battery and leave for 10 mins, this will make sure the ecu is reset (the offical time is somewhere under a minute). let it idle for 5 (offical time is again, under a minute) and give it a light drive to warm up then give it your blat. Check your intake, perhaps a resonator has a hole or has fallen out/slightly. He might have bumped your pod and it might be skewed. Check the whole intake line before refueling.

Fitted the stock airbox and a k&N panel back in, filled her up with premium. Runs better than ever. Thanks guys.

Try on Barry's fuel rail kit. It helps to fix the flat spot.

Fitted the stock airbox and a k&N panel back in, filled her up with premium. Runs better than ever. Thanks guys.
Sounds to me like you had a problem with your MAF. Un-metered air or a connection might have been loose and once played around with again has come good.

Checking the voltage on the MAF and conectivity would have been my first step and then a vacuum test.

AFR readings mean nothing with a faulty system, too many faults cause inconsistant AFR readings to be any use mentioning. Faults from a ignition missfire due to broken coils or as obvious as low fuel pressure.

Yeah. Also mechanic said something about there being no "honey-comb" in the maf sensor or something? i didnt take it out but he says that can cause a bit of trouble aswell, None as yet though so im happy. What would the honey comb do?

Its designed to smooth the flow of fluid past the MAF itself.