My car was running fine one day... the next day it's running super rich! It's blowing lots of smoke and I can't drive it without leaving a trail behind me. It's not blowing oil, smoke smells like unburnt gas and exhaust. MAP sensor is good and still connected. I've tried 3 different sensors to make sure. I've tried adjusting my fuel map on the PFC all the way down to run as lean as possible (.500ms). This makes no difference at all.

1000cc primarys / 1680 secondaries
Lag time is at +8 for the primaries and +12 for the secondaries (tried adjusting and makes little difference)
Injector duty gain is at 55%
PIM voltage is at 73.4%
Fuel Pressure around 37psi
Single Turbo Conversion, all emmions removed
I replaced all 4 plugs, and checked for spark
Runs much better if i open up some vac. ports to lean it out.
anyone have any ideas?

 

Injector leakage ? Pull and send off for a test/cleaning.

Later

 

You might want to post in the PFC forum. Are you rich at idle, boost, transition to boost? There are a couple of places in the PFC tables where you may have INJ corrections that affect these conditions. Please say more about what conditions you're running rich (boost, cruise, idle, transition). Even better, post--as an attachment--your .dat file (map) and a log of you running rich.

EDIT: 1000 cc primaries? Holy ****, I'm not sure how well, if at all, the PFC can control those.

 

i'm running rich like this all over the RPMs.. yes the PFC can manage 1000s, it has a setting for injector size up to 1500cc. i think one of my secs is stuck open since adjusting the duty cycle gain of the primarys has little if no effect. I've already done everything i could do lean out the mixture. I don't have a datalogit so i can't post my maps. I'm pulling out the injectors tomarrow to clean them and hopefully it will make a difference. I think they got gummed up from running rich while i broke in my engine.

 

still can't fix this problem... i've gone over every possibility... new injector O-rings (although that would cause me to run lean and not rich since i'm running top feeds), all injectors are opening and closing properly, fuel map is as lean as possible, PIM voltage turned down to 73% (engine cuts out when i try to rev if i lower it a lil more). fuel pressure is normal. i even unplugged my secondaries to see if that made any difference and it did not. i'm completely lost at this point. i'm especially puzzled because this was an overnight change, it was running fine before hand. please anyone give me some help here...

 

anyone???

 

looks like you could already have a solution to your problem

 

i already pulled out my injectors and blew through them all with voltage and without and they are all working fine.

 

How are you sealing the primary injectors in the block? I know we have had issues before with 1000cc's not sealing correctly and causing the same problem you have.

Jason

 

Did you check the vacuum connection to the fuel pressure regulator? If a line is loose you may end up with more fuel even if you're not boosting. From the FSM, fuel pressure should be around 32 psi @ idle... I think you said you had 37. Did you take that measurement with the engine off? see page F-104 and F-97 if you haven't already. Maybe your FPR took a crap on you just throwing stuff out to consider...

 

The only thing i come up with is water temp sender or air temp and you said they were good but is the pins and harness? How did you test the map senser?

 

fuel pressure read with engine at idle and vac. hose un-attached.

water and air temp sensors shouldn't make that much of a difference when running a stand-alone.

i can read all of the voltages from the sensors on my PFC

 

i'm pulling all of my injectors again today to have them flow-tested. maybe that will solve my problem

 

i dont have a pfc but with my haltech if air temp or water temp sensors have a fault the car runs as you discribe. like ****. smoke boiling out

 

To add to the above post i belive you need to ohm test and change temp conditions in order to test these sensors.

 

rotary bred,
do u have accest to another pfc. if so i would try switching that out.
i had a similar problem with my car, it ran great, then all of a sudden it started running rich and falling on its face. tried changing tps,leading coil,map sensor, ignitor, added hks twin power, nothing worked.
i had another pfc so i loaded my map to it, and the car ran great again.
maybe that pfc is your problem, i know of one other that has failed also.

 

good to know... i was leaning towards that myself. i decided to pull out my wiring harness and re-loom the entire thing. i found some extra wires that i never removed and maybe they shorted out causing my PFC to fail..?? i also decided that while i was at it i would get rid of my PFC and go with a Microtech LT-10... i was going to eventually anyways so maybe now my problem will be solved...