Problems with Mod X... UPDATE

[lanley v3 Profile]

So I've been having problems with my car for the last 4 months.

Here's the story:
If say I'm in 4th gear and take my foot off the accelerator and bring the revs down to 2000rpm+- then I floor the gas. I can hear the turbo spooling/engine growl but as I hit 2300rpm+- there is like a flat-spot/hesitation/pause. It happens till 2600rpm+- then you can hear the engine start growling and turbo boosting.

I've checked logs and the throttle is closing big time from 86% down to 36% when the problem occurs. After 2600rpm the throttle opens up again.

When this flat-spot/hesitation/pause happens I see my peak boost does not hit 1.2bar.

So I've changed many things:
New Turbo
New MAF (cleaned it twice after replacing)
New MAP (cleaned once after replacing)
New Throttle body
New Lambda O2 sensor (did throw error code the other but hasn't come back)

I've also changed my induction from the GGR to the DSCI and ran octane as C21 suggested but still the same thing.

So someone suggested loading the older DS files from the UK. Loaded Perf+ and DSCI.
Guess what, problem doesn't happen with these maps.

I would ask DS UK but those okes are clueless and referred me to C21 so I've been constantly e-mailing him with logs and advice.

Don't know what to look into anymore.

[Frecky_D Profile]

It can't be mapping related, dude.
Otherwise EVERYONE would have this issue with MODX. I've been running MODX since who-knows-when and I've never had any issues with the mapping.

It'll be hardware related, but I have no idea what it'll be.

[lanley v3 Profile]

It can't be mapping related, dude.
Otherwise EVERYONE would have this issue with MODX. I've been running MODX since who-knows-when and I've never had any issues with the mapping.

It'll be hardware related, but I have no idea what it'll be.

That's why I put the ??? after the heading.

I've shown logs to Shaun and Prash. Everything looks normal except for the throttle closing.

The other thing is, do others actually look for the fault I'm having. Not exactly. This problem happens under the conditions I mentioned above. Does everybody do exactly what I'm doing you get what I'm saying?

Just don't understand why the stock map, Perf+, DSCI doesn't do it which is my other point.

I've got the DSCI induction, Radtec cooler, full 76mm exhaust.

[Frecky_D Profile]

Still doesn't change the fact that it only happens to you.

I'll test it on my way home today and report back tomorrow.
Ask STock to do the same.

[Prash - C21]

Still doesn't change the fact that it only happens to you.

I'll test it on my way home today and report back tomorrow.
Ask STock to do the same.

STock and I chatted about this on the weekend, and he doesn't seem to have any problems.

[lanley v3 Profile]

Think I'm gonna have a brand new car by the end of it

Eish, now Ford is suggesting I replace fuel pump, lambda sensors.

[STock]

I'll do a log for you but i still have ob in from the weekend, so things may look slightly different in logs

[lanley v3 Profile]

I'll do a log for you but i still have ob in from the weekend, so things may look slightly different in logs

I can wait till you run the ob out. You got my bbm message right?

[Scorpion King Profile]

maybe your boost controller?

[KevSTer]

Have you tried putting the stock Spark plugs back

[Bloubul7]

Lanley, pm me your email addy. I will forward you my logs from the dyno on the weekend.

[STock]

I'll do a log for you but i still have ob in from the weekend, so things may look slightly different in logs

I can wait till you run the ob out. You got my bbm message right?

yeah got your long **** msg

[Daav - C21]

Have you tried putting the stock Spark plugs back

I suggested the same thing while back ...

[lanley v3 Profile]

I've put the stock RS plugs back in.
Forgot to mention that.

[lanley v3 Profile]

And I've run injector cleaner