boost skippage??

[Bfiver]

i have a b5 1.8t tip i recently did the diode mod and added a MBC.... after the mod i was boostin all over. about a week after when i run through the gears its almost as though when the boost starts to peak it feels like it starts to skip. . . a few times my engine light has flashed a bunch of times while the skipping was happening then shuts off... im sort of a newbie at all this so sorry if its not explained well.... any idea???

[erikas3]

i have a b5 1.8t tip i recently did the diode mod and added a MBC.... after the mod i was boostin all over. about a week after when i run through the gears its almost as though when the boost starts to peak it feels like it starts to skip. . . a few times my engine light has flashed a bunch of times while the skipping was happening then shuts off... im sort of a newbie at all this so sorry if its not explained well.... any idea???

Misfire possibly? I would start with the cheapest fix first- maybe you just need new spark plugs..

[Bfiver]

thats what i thought maybe I blew a coil pack i havnt checked yet. . . but i also turned down the boost and went WOT and i had no skipping with the boost turned down

[maxspeed]

new plugs, gap em to .028, keep the boost at/under 15 psi on a stock chip ;)

[andyrew]

Simple fix is buy the proper chip... then you have no worries..

[Bfiver]

ya i know that but.. . . not everyone has 500 bucks to spend for pleasure i wish though

[Bfiver]

im pretty sure my car has coilpacks and not spark plugs

[ct1.8t4me]

im pretty sure my car has coilpacks and not spark plugs

Step
Away
From
The
Audi

Seriously though - your car has BOTH coilpacks AND Spark Plugs.

The coilpacks sit atop the spark plugs.

[Ewok_Fetus]

ya i know that but.. . . not everyone has 500 bucks to spend for pleasure i wish though

Then maybe you should wait until you do have $500 or you might end up spending $5000 on a new motor...

[Vreihenmotor6]

Misfire possibly? I would start with the cheapest fix first- maybe you just need new spark plugs..

I had the same issue early this week, and a new set of nGK plugs fixed it right up

[Bfiver]

thanks Vreihenmotor6 ...... you know not everyone in this world that owns an audi knows everything about them.... ct1.8t4me... it would be nice to be able to come on here and ask question that i dont know and get help with it rather than some dick that thinks they know it all tell me to " STEP AWAY FROM THE AUDI" try being considerate next time bud...... no need to be rude your not proving ne thing

[kingtr]

Step
Away
From
The
Audi

Seriously though - your car has BOTH coilpacks AND Spark Plugs.

The coilpacks sit atop the spark plugs.

Haha, simply amazing.

[kingtr]

thanks Vreihenmotor6 ...... you know not everyone in this world that owns an audi knows everything about them.... ct1.8t4me... it would be nice to be able to come on here and ask question that i dont know and get help with it rather than some dick that thinks they know it all tell me to " STEP AWAY FROM THE AUDI" try being considerate next time bud...... no need to be rude your not proving ne thing

Oh come on, you did in fact say your car did not have spark plugs, only coilpacks. You shouldn't get bent out of shape when someone makes a crack at ya over a funny claim/comment. You have to agree that most people who do not think their car has spark plugs should probably leave it to a shop. Just saying... No big deal though, a thick skin suits one well around here.

[andyrew]

You dont have to buy a new chip... A used one would work just as well... 300 or so..
That or turn your boost back to stock...

GL,
Do the right thing...

[ct1.8t4me]

thanks Vreihenmotor6 ...... you know not everyone in this world that owns an audi knows everything about them.... ct1.8t4me... it would be nice to be able to come on here and ask question that i dont know and get help with it rather than some dick that thinks they know it all tell me to " STEP AWAY FROM THE AUDI" try being considerate next time bud...... no need to be rude your not proving ne thing

Chill out man. Honestly, my intent was comedy, not dickishness (ha!). AND I gave you the answer - or rather made a correction to your statement about not having spark plugs.

I am not trying to prove anything on here or anywhere else on the internet.

As an aside, and not to be a dick, but can you point me in the direction of a gasoline-powered car that does not have spark plugs? Cuz I can't think of one.

OK - maybe that was dickish...

[ct1.8t4me]

Now as a serious response:

Trying to cheat and get a manual boost controller + Diode CAN work, but can also bring about very unreliable and inconsistent results. It's next to impossible to troubleshoot an issue like that without being in the car because MBC's are so finicky. Believe me - I TRIED to run an MBC with no ECU upgrade on my car, and I have an AEB - no Diode mod is going to help me. The best I could do was get 10-11 PSI out of it, but God forbid the temperature changed or the air became more or less dense and I would hit the hard fuel cut. It was just not enjoyable. You never knew how the car was going to react when you got on the gas.

The bottom line here is that if you are going to try and save a buck (or 3-500), and use the MBC+Diode mod you are going to have to fiddle with it to get it anywhere close to "consistent". Also - what kind of MBC are you using? Are you using a bleed type or a Ball & Spring? This may also affect your results.

After messing around with it forever and trying all sorts of low buck solutions like getting a 5-Bar FPR in conjunction with the MBC - I finally just ended up buying a used APR 91 Chip from someone on here or Passat World I can't remember. I still use the MBC to squeeze out a little more boost and to change the boost curve a bit, but the car is much more predictable with the chip - and now I'm boosting 18-20PSI without problem.