Help guys. I just finished putting together a 350 TPI engine, and I'm having some significant problems getting it to run. It is running extremely rich, there is this black smoke and reeks of gas when I can get it to run. I've got a comp cam 294H series cam w/flat tappet lifters, flat dish standard bore pistons, heads done including port/polishing, 22lb injectors, new distributor, new accel plug wires, new ac-delco plugs..etc. I'm using a modified AUJP bin, but I am running out of ideas on the running rich. One of the things that I'm looking at is the valve adjustment. Does anyone know if the 294H series cam needs a different size push rod, or will stock rods work?

I'm using the super 8d ecu file, super aujp bin, and tunerpro for datalogging. how do I get the datalogging file *.adl into another program to look at the data, such as vemaster?

Any help on my next course of action to smooth this out and stop it from running so rich will be greatly appreciated!

thanks

 

I already posted this in your other post but here it goes. Make sure that the fuel pressure regulator is not pouring fuel into the vacuum line going to the intake. I would use datamaster to log since (in my opinion) it's easier to view/play back the recorded data. What kpa does your cam idle at. Is it going into closed loop and trying to pull fuel or are you greating an open loop chip. You may need to change the Open loop % change AFR vs MAP table to prevent additional fuel from being introduced due to a lower amount of vacuum at idle. Or you may need serious work to the V.E. tables still. Good luck getting it running.

 

My FPR inlet is from the supply line from the gas tank, the outlet to it is to the fuel rails supplying the injectors. I've thought about that the pressure may be too high, and reduced it ( I don't have a fuel pressure gage hooked up yet). did you mean the cold start injector line? I've removed that and plugged it. I don't have a vacuum gage yet either. I guess that I'll have to go and get a set.

any starting points for the adjustment of the ve table and Open loop % change AFR vs MAP ? I've let it run, although very rich, until the thermostat opens, but I'm not sure if it's going into closed loop or not.

 

Ok, I've gone into the aujp bin and adjusted some items. Here's what I adjusted and by how much, what do you think of these?

reduced ve/rpm/map by 5 pts across the board (upper and extended tables).

increased spark adv vs rpm vs map by 2 degrees

reduced open loop% change to a/f ratio vs map by 3 percentage points across the entire range

zero'd out the start up enrichment table

crank fuel pw vs coolant temp reduced to 1100 between 46F and 240F

increased idle rpm vs coolant temp to 1000 rpm, this is the lowest that I've been able to get the engine to stay running at.

what would happen if I also adjusted the injector size as well, telling it that I have smaller injectors that I really do?

thanks for the help!

 

Stop starting your car and get a fuel gauge. You dont have any clue as to what your pressure is. Wanna break something?

Once you've established your pressure is reasonable, kick down the injector constant in the bin until you get it to idle around 128.
Then see what the rest of the VE table looks like.

The Injector constant is an imaginary number. I too used to like to get it to be exactly what my injectors were. But in reality its only a number the code multiplies, divides out, and remultiplies to get a base pulse width. If your VE tables are close (i.e, the same blm everywhere) then adjust the injector constant rather than changing every ve cell.

-- Joe

 

Ok. I am doing this as a v6 to v8 swap and I kept the stock v6 tank fuel pump. what kind of pressure should I be looking for?

 

40is idle, 45-48 with vac line off

 

ok. I'll check the fuel pressure. I had guessed that the stock fuel pump from the v6 would give me a what I needed, but I modified the regulator to make it adjustable and I'll look at it tomorrow. how about the push rod question? I'm still wondering if the valves have too much overlap and aren't closing in time. I'll going to try and do a compression check on it monday too, if I can get to all the plugs.. haha.

thanks for the information

dale