Thread: Power Loss under Acceleration

One possibility is too much turbo lag. Maybe waste gate issues, or coked up turbo vanes causing too slow a wind up of turbo. No doubt there are other possibilities also. If turbo is found to be coked up, we may have easy fix.

Good luck

Brid

fuel delivery pressure / aerated fuel or an injector thats sticking under load.

Assuming of course that everything else you've checked out is ok.

Baz
I belive its overboost.
Mine does it too under some conditions.
Was it a much cooler day today???? See if it does it on a cold nite,bet it will.
I havent bothered re-adjusting my wastegate,its obviously adjusted almost to the optimum point.
The ECU only seems to go into limp home when its exsessivly over boosted.Mild overboost seems to momentarily cut fuel.
Andrew

I am inclined to go with blacknight. You may have had some water/bad fuel go through your injectors and this will stuff them, as mentioned fuel pressure to the injectors may be down as well.

Well, it fixed itself, I believe since it did this after turning the car off and restarted it, it was an overboost problem, so on the weekend I backed the wastegate off and so far all good.

I also changed the air filter, cleaned the MAF and AAP sensors, changed the fuel filter, checked intercooler hoses and tightened them, checked the wastegate arm for sticking and lubed it.

So thanks all for your input, I'm so glad it wasn't an injector, so all good.

I'm slowly going over things in preperation for our upcoming Gulf trip in September, replacing hoses and fluids, checking bearings, bushes and shocks, installed some Coilrite air bags on the weekend (thanks for your help Phil)

List for replacement so far are;

Radius and trailing arm bushes
Rear shocks.

Thanks again fellas, Baz.

Some more on this, it reappeared again, so I backed the wastegate off another turn, it has cured it to a point, the miss is now only appearing on a trailing throttle at low speeds but very infrequent.

I think some more investigation is needed.

Baz.

Originally Posted by Blknight.aus

fuel delivery pressure / aerated fuel or an injector thats sticking under load.

Assuming of course that everything else you've checked out is ok.

Redback I had a similar problem a while back with my Patrol and it would come and go. It turned out it was aerated fuel as Blknight stated, air was getting in through a cracked hose on the water separator.

Baz, If that miss at low speeds and trailing throttle sounds like 1 or more cylinders not firing, (or a 13B bridge ported Mazda rotory engine at idle), and goes away as soon as you touch the throttle, then it isn't unusual for a flash tune ECU model, only with manual ones though. The overboost issue is as you have discovered, every flash program I do I have to thoroughly test as most require the wastegate backed off to some degree.

The fitment of a bigger IC can help this

JC