Hello, I only found one similar thread, but no useful info. I just installed my used pfc and am running the base map the same way the previous owner with the same setup had it. First of all this thing is bad ***! I love it. only problem with it now is that on warm starts the car has to turn over like 5-6 times before it starts. and when it does start, the revs increase slowly untill i reach idle. It started up great with the stock ecu. Stock ports, stock twins.

I know i will be asked to post my current settings on the pfc but I dont know where or what would be relevant to starting the car up. So i will need some clarification there.

One more thing i feel that I should note is that after I began plugging the pfc up to the harness, I noticed a small black plug about the width of my finger was hanging in that area. I could not find where It might go to and left it. Might this have something to do with my weak starting issue? Or maybe something else I am not aware of?

Thanks everyone!!

 

Small black female spage connector most lilely is part of the fuel system/cooling recall. If you ground it out while the engine is running, the radiator fans will rev up one speed over their current speed. Search on "fan mod".

 

i have the same issue with the start.

I am running 850'cc primaries.



also, do you have slow speed "bucking" with the base map? In 2nd gear I used to be able to keep off throttle and keep moving, but now it starts bucking like a horse.

 

thanks. im looking at that now

have you searched on running higher flow primary injectors with the base map? I read its hard to get them to run good.. without a datalog and tune im guessing? But yeah maybe your just getting too much fuel on startup. What does it idle at?

Do you have a single?

 

Anybody??

 

If it ran fine with the stock ecu and the PFC has a hickup, then you need to tune it out.
It is a tuning issue!

You did not mention your mods. The PFC comes with a map for a few mods and it is not optimum for a stock engine and setup.
I do have the stock map for the 99+ FD.

 

I idle and drive just fine with the 850's (aside from a hesitation at 1.5-2.5krpm tip in). It's just I need to coax it a bit while cranking... and it idles low (500-600rpm) until I give the throttle a tap which brings it up.

 

to the op, did you follow the ''learn idle procedure'' when you installed the used pfc?

 

I have the later model pfc that i hear is good for a few more mods on the basemap. I currently have.. ARC intake, DP, MP, & CB. I also had the stock cat on when i first installed the pfc and it had a very slow startup also.

Yes I did, and since my original post I also reset the pfc and ran the learn idle again.

 

Try pulling some fuel out at the higher air temp cranking table, not sure if this table is accessible with the comander or if this is only through the datalogit. If it's not then you might be able to tune the cells that it cranks in. Hot starts don't like as much fuel.

 

I lowered the values in the water temp correction table..
+80c down to 1.0
&+50c to 1.0

this helped out a lot but the values wouldnt go below 1.0
sooo I guess if I want to make it even better i could mess with the cells..

but it is much better now though! thanks Dudeman

 

No problem glad it helped.

 

Car needs to be tuned.

Not a good idea to be driving anything other than like a grandma with those mods on a base map...

 

I appreciate you're concern but im not looking to spend $500 to fix this issue. Besides, I think Im safe running stock boost with the PFC.. Thanks!

 

80C s always suppose to be 1.00 as that is a warmed up engine.
But lower temps will need to be higheras it takesmore fuel for a cold engine to idle. Set all back to default. That is not your problem.
When the engine is fully hot, then tune your idle. Only after that do you tune the water temp correction table!

You need my tuning notes!

 

is the yahoo group the only way to get them? it wont let me join..

Another thing.. I live in arizona and its been pretty hot lately. would that make any difference at all? I would think that a properly set up PFC would start the car up a lot easier than it has been.

 

The table i was refering to is only for cranking ms, it may only be accessed under the datalogit. You will have to pay for the tuning notes and then you can join the yahoo group. Pm chuck.

 

the 500$ will save you a rebuild.... Dont play with tuning if you dont know what you are doing

 

Im just looking for a fix for a weak start issue. Im not playing with boost or changing around any cells in the power band.. Do you guys think I really will blow my motor by starting it up?

 

The temperature correction table effects all areas of the map. So yes if you don't have the cells tuned properly in boost after changing the table it could blow your engine. As chuck mentioned your 80c table should have already been at 1.00 so it's odd that it was higher unless you or someone else changed it prior. The base map should be safe with the mods you have. And at 10 psi the likelyhood of running too lean and detonating is lower then at a higher psi.

 

Okay I changed everything back to default. So I'm going to need a datalog to really fix this then? Ugh yeah I think I should just deal with it now untill I can save up for a wideband.