Mechanic = Stress HELP!!!!!!!!!!!!!!!

[firefox]

I have a Nissan Skyline r33 gts-t 1994, fitted with a Microtech LTX12. My mechanic can never seem to tune it right

problems include

- high idel (1,500 rpm)

- misfireing

- poor fuel consumption (average 250km per tank city driving), now lean spots after he leaned out the tune and still poor fuel econmy

- afterburn, flames out of the exhaust after you change gears on full throtell

I go back and he 'fixes' it for free as i have already paid him for the work but it never seems to get fixed.

the same sort of thing happened when i got the engine rebuilt, but now its ok (i think).

what shall i do?

[sigsputnik]

what do you value more, the money you've already paid to this guy, or your engine and sanity?

if the former, keep going back until he gets it right.

if the latter, find somewhere else to fix it up.

[Guest Mashrock]

go somewhere else who can possibly tune properly?

[T04GTR]

I think its time to find a new tuner. :uh-huh: im not familiar with tuning shops in melbourne

but any of the rotor shops will be able to help

[mr_rbman]

get an apexi power fc, easy to tune!

i don't know anyone with a microtech that has been successful with tuning on a jap car!

[dnb]

i do. they are great!

my mate is making 457rwhp/ ltx12/ rb25

get a new tuner. he isnt doing very good at all.

the injectors arent cutting out when you back off

[RB30-POWER]

The microtech is a downgrade in my opinion on the RB series motors.

They are such a refined piece of gear that when run by a less then great management system makes the entire car/engine a real pain to drive and live with.

A better match for the your RB engine would be a PowerFC or Motec.

I've seen even really well respected tuners and workshops tune Microtechs on the RB and unless you spend lots of hours on tuning/cold start etc etc you may never get a factory type operation.

PowerFC is designed to work with all factory sensors and already comes pre-programmed for cold starts etc.

Regardless of the above though, the symptons you described could be mostly ironed out by a decent tuner.

[Dee 33]

Same as everyone else. Take it to a tuner who knows Microtechs.

Average Joe Joe mechanic has no damn clue on how to tune an ECU. I winced when the RACQ guy started fiddling with my Wolf3D hand controller when it had starting probs.