Please give me some idea's.

[jamnut]

My truck is running rich as $hi7. My computer is at war with my datamaster cable so I can't even data log. Below is what I've done to it since the last time I ran it.

Ultimate 3 bar & 50# injectors
BBK 58mm tb
Plugs, wires, cap, rotor, all the tune up stuff including a fuel filter.
AFPR set @ 45psi base.

When I start it it's already too rich, I can let it run for a while & it stay's rich. When I rev it up it has trouble revving, if I rev it a few times it finally free revs. I feel like it's having trouble revving due to bogging from being so rich. One thing that I noticed, that I never noticed before is that when I finally get it cleared up enough to rev pretty good it starts building boost pretty quick in neutral? When it's in neutral & I'm revving on it, I'll see 10 - 12 psi of boost just revving on it, this is on an autometer boost gauge I don't remember it building boost like that in neutral.. I don't think that I have a vacuum leak due to the fact that when I pull the vac line on the AFPR it really messes with the idle so all my vacuum lines seem intact. When I'm trying rev it it usually has trouble getting over 2500 rpm's, I start hearing my WG fluttering & once I push it past the 2500 rpm mark & get the motor cleared up a little bit that's when it starts showing boost in neutral.

One of the first things that came to my mind is did STG really burn my chip with a 50# bin? If it's a stock injector chip, but I'm running 50# injectors & 45psi of fuel pressure maybe that's what's flooding it.
Another thing that I thought of is that it may be the BBK 58mm tb?

I've already worn out the search feature over the last 3 days, this is my first post on this issue becasue I'm finally dumb founded.

Hit me with some idea's to be able to lean it out. It's so rich that I don't think that just adjusting fuel pressure is going to take care of the issue. When I first fired it up it was smoking as bad as it is right now & running 15 less psi of fuel pressure. So if it was rich @ 30 psi & it's supposed to be running around 45 psi, that's telling me that it's not a fuel psi issue making it rich.

 

[TYTILIDIE]

Re: Please give me some idea's.

I dont have 50's but I can tell you that I leaned out a lot when I had my fuel pressue set higher. Its wierd I know but you ahve to find the happy medium. You def need to get DM working or youll never egt anywhere. Also, it sounds like youre not sure about your INJ or chip. Ild find all that out first. I doubt the TB will give you head aches.

 

[jamnut]

Re: Please give me some idea's.

I don't understand what you mean about not sure about my inj or chip. The only thing I can't verify is if my chip is really a 50# chip of if it just says 50# on it, I wouldn't think that STG would mess it up, but I'm just looking for answers. I have a wide band that I haven't finished hooking up yet, but with it being this rich the wide band would be off the charts anyway.

 

[MYYellowTY]

Re: Please give me some idea's.

My first guess would be the chip.With DM or the wideband youd be able to lower the fuel press. to see if it starts leaning out.

 

[TYTILIDIE]

Re: Please give me some idea's.

I have a very similar problem with my truck except once I burn it all out Im good to go til next time I start my truck.

 

[QUICK STORM]

Re: Please give me some idea's.

it could be a bad afpr

 

[gjp]

Re: Please give me some idea's.

try dropping your FP down. Mine idles and runs good with a lower Fp but knocks at wot. I traced it down to a bad afpr.(i hope) my fp goes up when truck is hot. when cold it runs good at 40psi but when its hot it misses. it runs good hot at 36psi but knocks when cold at 36psi. you could turn down the fp to try but dont hammer it to much. also check your fuel filter. Mine was clogged and made it worse.

 

[jamnut]

Re: Please give me some idea's.

try dropping your FP down. Mine idles and runs good with a lower Fp but knocks at wot. I traced it down to a bad afpr.(i hope) my fp goes up when truck is hot. when cold it runs good at 40psi but when its hot it misses. it runs good hot at 36psi but knocks when cold at 36psi. you could turn down the fp to try but dont hammer it to much. also check your fuel filter. Mine was clogged and made it worse.

My fuel filter is brand new, the AFPR could be bad, but I constantly watch my fuel psi on an Autometer gauge & it looks to be working perfectly, bringing up the pressure with boost & dropping back as needed, it seems to hold pressure really stable.

 

[#2875]

Re: Please give me some idea's.

i think your fp is high. i can't say for sure because i don't have the same chip... well it's the same except for i have the vortec heads program. i was told to start at 43 to be on the safe (rich) side and go down from there depending on a/f ratio. i went down to about 40.

 

[HighPerformanceTrucks]

Re: Please give me some idea's.

I thought the 50# ultimate chip ran open loop programs except for 15psi. I would think you would have to select the proper fuel curve. A WB datalogger is necessary for this.

 

[jamnut]

Re: Please give me some idea's.

Thanks for all the idea's. I have to go to work tonite for 14 days ( drilling rig in the Gulf of Mexico ). I'm going to study up while I'm at work. I'll probably order my new turbo while I'm working & when I get home I'll have my DP modified so I can run the Wideband.

I will attempt to run the wideband into the stock computer with the Ultimate, but for right now I'm going to run the wideband as a stand alone. One less thing to trouble shoot while messing with the rich issue I'm having right now.