someone please help overfueling

[bens_cab]

as the title say running a vw 20vt engine in a mk1 golf using msns-extra v3 029q and lc1wideband

so far i have eliminated the wideband using 470 resistor have it all configured both mt and log works read the same afr

right now to the problem it doent matter what i change the afr sits around 10 and jumps up and down when revving

what i have noticed is that my map gauge will not go below 55 but does go up alot when revved

datalog and msq attached

my map sensor goes from the ecu to the inlet manifold correct??

also when i changed to rpm enrichments the car became more stable at tick over and revved alot better

please please help a novice squirter squirting right

Ben

[bens_cab]

just tried 2 squirts oer cycle still no change

anyone got an idea

[T3Bunny]

Get rid of that code first off. It has wrong .inc tables in it or something. Go grab the newest. Last week it was 029q2.

Yes, the signal needs to go from the ecu directly to the intake manifold. If you use a throttle body port, make sure its not a ported one. Its better to just go right to the manifold if you can. On the 20vt, you can likely use the same port the fuel pressure regulator uses without any issues.

Takle a look in the tuning section in the MegaManual. You should be able to tweak your readings down further by fiddling the VE bins and the timing at idle. 55kpa is a little high. If you don't find it, let me know and I will dig up something another MSer wrote for me long ago.

[bens_cab]

do you mean reflashing the ecu with 029q if that the case why not use the newest code 029s

also my map goes into the intake right next to the fuel regulator

if i need to reflash my ecu how on earth do i di that my ecu came allready flashed

cheerss
Ben

[T3Bunny]

Just whatever the newest code is. I know something was wrong with the 029q code. Not exactly sure what other than something about bad tables.

Go and download the latest code and look through the folder. There should be a setup readme doc in it. Your NOT going to need to use the boot jumper since your upgrading from the Extra code. If your running any Bosch sensors, your going to need to use Easy Therm and burn some custom code for it. Pretty easy actualy.

Its a lot of reading, and seems a lot more complicated than it is. I can do it in my sleep now (I did my last one after having been working for 48hrs straight to get the car online...).

[bens_cab]

right been told today that im running 029q2 so now what

i changed a fuel pipe today because it was bulging and there was a shed load of fuel pressure there im running the standard mk1 fuel pump and accumilator with a audi a3 fuel pump relay could it be i have to much fuel pressure causing me to run rich???


can i adjust it somehow ???

[jsmcortina]

Code 029q2 works correctly and is the official current code.
Code 029s is actually an alpha test code (that's why it is in the alpha directory) but will probably become the "latest" code soon as it contains a few small fixes over 029q2.

Does you inlet air temperature display correctly in Megatune?

Are your fuel pressure regulator and return pipe working correctly?
With a blocked return line those efi pumps can crank out some large pressures (hence bulging line.)

James

PS. for others reading this thread, anyone using Easytherm to load new sensor tables into 029q will already have avoided the incorrect tables bug.

[bens_cab]

juat going to re check fuel side of things heres a data log from earlier

[jsmcortina]

Is your map sensor reading correctly? It seems remarkably stable while idling and goes over 100kpa at one point. Check where you have it connected - it needs to be a full vacuum source. i.e. straight into the inlet manifold and not right beside the throttle plates which could be a ported source.

It is normal for the kpa to drop as you rev it because you are opening the throttle. If you rev it up the let the throttle snap shut you'll see a very low kpa reading due to engine braking.

James

[bens_cab]

my map sensor hose goes directly to the manifold but does have a t piece for my dump valve

also the fuel pump is the old k-jet style new tho and new accumilator