Flashing Cel + misfire, 5000rpm under hard load,

[luckyegg]

He Saabers,

Now i think the last post i started was about my, Engine rebuild,
Well Its all done and i have done about 2k,
But the are still problems, Mainly the FLashing cel under hard accelaration, with a sudden loss of power almost like the car has asthma,
Now the engine has been completly rebuild from top to bottom plus turbo clutch Ecu, and many other part.
I have also taken it to my Indie Andy@saab centre,to have the ecu mated plus full software upgrade,And today took it up for a session on tech2, (Free i must add)  and No fault codes are stored,

So has any1 got any ideas? TB Maybe,
I thought id done it when i rebuild the car.

Any help would be appriciated as she's very nearly perfect mechanicaly so would love to get this sorted,

[sgould]

It's odd that you have a flashing CEL and no codes stored. The flashing should indicate an engine damaging condition.  And a serious fault with the throttle body should trip the solenoid and put it in limp home mode.

If the problem occurs under hard acceleration, I would suspect its caused by fuelling.  Running weak and causing detonation or knocking.  Difficult to diagnose but has the engine been remapped?  Is the fuel pressure regulator OK? Is there dirt in the injectors? Fuel filter blocked?

The only time I have seen a flashing light is when I ran out of fuel.

[Audax]

I've seen it before for various reasons, one thing to check is your air mass meter, just check that the 3 coils look OK.

[luckyegg]

Thanks for the replies,
Engine was remapped but ive put her back on a standard ecu as i wasn't sure where the map was done and always felt it was running to high boost pressure, this was congirmed when the turbo was rebuilt as the mentioned it most likeley failed due to a bad remap.
Fuel filter was changed when car went back on the road, and she's run on 97 or higher, not sure about the regulator, where is this located and what should i be looking for. and i think the injectors are fine, but any ideas on cleaning checking, would a fuel addative help??
She's not kicking into limp home so guess that rules out TB,
DI was replaced last year but, it did bring up fault codes before the engine rebuild saying left bank not charging.
DI is still under 2year garantee so could go direct to saab(any thoughts on this)

Air mass is a possibility as the car had a rather stupid aftermarket fillter fitting when i bought her which was open to the elements, so i guess it could of been damaged at that point, just to note i did get the flasshing cel before the rebuild under same conditions.(is the air mass meters same on B205 and B235R)

Just getting a bit frustrated now as the £4000 spent plus purchase price of the car it is starting to get very silly.

Thanks for you replies guys

[sgould]

Well if it's the same before and after the engine change, you should be looking at the original stuff.  I thought fuel/mixture and Audax has pointed to the other element in the air/fuel equation, the air measurement. 

I would be looking at that, especially now you say it might have been exposed to unfiltered, or badly filtered air.

Also wiggel the connector to the air meter.  I've heard of some electrical connection problems too.

[luckyegg]

Sounds like a plan will have a play with that tommorow, will also swap the unit from the old mans car and see if that makes a differance,
thanks for the ideas will keep you posted on progression,

but if anyone else has any idea please please say hello.

[luckyegg]

Ok so ive looked at the air mass meter today seemed ok but swapped it over with the one off my old mans car, still the same problem,

she feels like she'd being staved of oxygen underhard boost,
As i no the car has been messed with in the past, was wandering are the any adjustments that can be made to the boost pressure or anything that involes the induction side that is not covered by the ecu,
as the ecu is completly standard.

[luckyegg]

Ok so ive been doing lots of investigations into the flashing cel,
ran an odb2 diagonostics today and she comes up with fault code p1300
which is torque limitation signal low,

lots of things said on net about this, mainly DI, But i have had a test DI rail on over the weekend provided by my indie Andy@Saab centre.
and we still have the same issue,

now i did find the dump valve had been fitted the wrong way round, and this has been like this since i bought the car, this is now put right but no difference, but was wandering if that could of failed internally thus causing the fault.

the other poss is cps, but surely that would bring up its own fault code.

any ideas thoughts or possible fixes would be welcome, but if not i'll make sure i report all findings

[stevetreacy]

Hi,
DTC P1300 is "random misfire detected, catalyst damaging". I would have it Tech 2'd again. Freeze frame data should be stored and this would give indication as to cause.

steve