Strange timing and severe hesitation problem

[90blacktsiawd]

So i just got my car back from getting a new head, tranny, cams and turbo on. I then put a new front mount on as well. I was having a problem with idling but eventually the ecu learned the new setup and its better now though not completely gone. I did a search but couldn't find any one with the exact same symptoms. My car won't get over 4k if I'm giving it some gas. The turbo starts to really spool at 3k and starts to pull harder up to 4k which seems to be were the car should be taking off. It's like i just hit my stutter box. A puff of smoke comes out, the exhaust pops and it just can't get through the rpms. It's definitely not fuel cut. I've experienced that before and this isn't it. If i very lightly push on the gas i can get up to about 5.5k but then it stutters to hesitate. If i free rev it in neutral i can hit 6k before it does the same thing. I'm not knocking when this happens, i have all boost leaks up to 23psi fixed, plugs and wires all look good and are only about a month old and messing with my translator doesn't do anything wether i richen it up or lean it out. Plugs are gapped at .28. Also my o2's seem to be fine when i get on the gas. around .90 - .92.

Now for the weird timing issue. When i got the car back the mechanic had the timing set at 20 BTDC! I fixed that and have it down to 5-6 BTDC now. When i ground out the ecu and lock the base timing in it holds steady but jumps to 10 BTDC and you can hear it in the motor when this happens.

I'm going to pull the ECU today to make sure it doesn't smell like fish but it's already had the caps replaced about 3 months ago. Please help on this one I'm totally stumped.

 

[90blacktsiawd]

No i'm not still on the stock ecu i put my eprom back in. And i'm no maf-t tuning wizard either but i do have it set for 450's on the translator.

Now when you put on your FMIC did your tune change?

And i don't think this is the case but i'd almost swear that soemone put in bigger injectors. I can't possibly think of another reason why i would have to subtract so much fuel when i'm flowing more air. It makes no sense.

And what is w.r.t. ?

 

[DSM90AWD]

Now when you put on your FMIC did your tune change?

I put my FMIC on many years ago, but do remember that my S-AFC settings at the time did not change much. Why would they? Your MAS/MAF is reading "X" amount of air so injects "Y" fuel. The air charge is going to be cooler/denser with a FMIC + larger more efficient turbo. So with the same AFC/MAFT settings with the 16G/SMIC, you should be running leaner not richer.

And i don't think this is the case but i'd almost swear that soemone put in bigger injectors. I can't possibly think of another reason why i would have to subtract so much fuel when i'm flowing more air. It makes no sense.

Definite possibility. I remember (here or DSMTalk) someone whom purchased (what he thought were) 650s but instead recieved 1000cc . Needless to say he spent several frustrating weeks trying to tune with them until he realized the problem.

Do you have an aftermarket pump / AFPR? If so what are they and what is your base Fuel Pressure set at?

And what is w.r.t. ?

Sorry, with respect to

 

[90blacktsiawd]

The air charge is going to be cooler/denser with a FMIC + larger more efficient turbo. So with the same AFC/MAFT settings with the 16G/SMIC, you should be running leaner not richer.

So your saying with a bigger turbo and cooler charge i should be leaner on my fuel than with a 16g and a sidemount?

Definite possibility. I remember (here or DSMTalk) someone whom purchased (what he thought were) 650s but instead recieved 1000cc . Needless to say he spent several frustrating weeks trying to tune with them until he realized the problem.

No i've had these for some time now and when they went in they were definately 650's when they went in. It's only been since i got the car back that i'm thinkin this. Though i really doubt thats what happened.

Do you have an aftermarket pump / AFPR? If so what are they and what is your base Fuel Pressure set at?

I have a walboro 190 thats been rewired. Haven't gotten to the AFPR yet but it's on the list. And it's a very long list.