Tuning Problems. - Page 4

boss96 · 12-31-2005, 08:40 AM

Quote:

Originally Posted by black_nightmare

The air/fuel is shown in the dyno curve in my first post. Could you clarify what you mean by the dyno settings? My car was run on a dynojet. I believe that the other car was tuned on a Dynojet 224xLC. I assume you mean the load factor, since that can be changed with the 224xLC for simulating various road conditions? If that is the case, then the tuner has some explaining to do as to why they are quoting horsepower at a loading other than the weight of the car.

I am seeing 16.5 degrees spark advance at 6000 RPM

Sorry, I read it too fast and did not notice the a/f graph. Yes, it is a little bit lean and may benefit from a little more fuel, only way to know is to try it. I would be very careful with adding more spark, 16.5 is pretty good. With the intercooler you may be able to add more but be careful, not worth it to get a good hp number with a tune that is right on the edge for pump gas. Or get a Snow WI kit and go from there. The WI will enable you to add quite a bit more timing safely.
Bob

tacbear · 12-31-2005, 11:49 AM

You definately need to add some fuel!

Shankin · 12-31-2005, 01:42 PM

I would change out the mass air meter for a 90. I have seen the cams be a little off from the factory causing some cars to make less than normal also.

black_nightmare · 12-31-2005, 10:04 PM

Could the flattened curves and low power be indicative of a clogged catalytic converter?

Scothew · 12-31-2005, 10:38 PM

if it cant get the exhaust out, its defintely a possibility. You may try running a can of seafoam through the engine to clean it and the cats out. Do a search, i believe we have discussed it before on here.

Also, whens the last time your fuel filter has been changed?

black_nightmare · 12-31-2005, 10:43 PM

Quote:

Originally Posted by Scothew

if it cant get the exhaust out, its defintely a possibility. You may try running a can of seafoam through the engine to clean it and the cats out. Do a search, i believe we have discussed it before on here.

Also, whens the last time your fuel filter has been changed?

I replaced the fuel filter when I installed the fuel pump ( right before Thanksgiving).

TheJeanyus · 01-01-2006, 02:07 PM

I've heard of cars leaving the factory with the carpet in the way of the gas pedal or something and not being able to truly achieve WOT.

black_nightmare · 01-01-2006, 05:31 PM

Quote:

Originally Posted by TheJeanyus

I've heard of cars leaving the factory with the carpet in the way of the gas pedal or something and not being able to truly achieve WOT.

I checked that when I installed the new plenum and throttle body. I think I'm going to try swapping the x-pipe with an off road x that I borrowed from a friend to see if I might have a clogged cat. Sometimes I can smell something eminating from that general area.

black_nightmare · 01-02-2006, 01:21 PM

Well the cats seem to be flowing fine. I had a pressure test done on the cats. It showed no blockage. Anyone have any other ideas?

black_nightmare · 01-02-2006, 02:18 PM

I spoke with the tuner again. He mentioned that the 2003 GT that this tune was originally made for, achieved 180% load while mine only achived 140%. Both cars achieved 10 psi of boost at 5700 RPM. What would make the load be so different? The 2003 GT did have the later style MAF with the bar only protruding half way into the flow, while mine is the older style with the bar all the way across the meter. Is there a difference in the way these two meters read other than the newer stlye having the temperature sensor integrated into the meter?

12-31-2005, 11:49 AM	#32
tacbear LE equipment inventor.... Join Date: Dec 2004 Location: Jasper,AL Posts: 1,751	Re: Tuning Problems. You definately need to add some fuel! __________________ *You're either SWAT or you're NOT!!* "Hondo" 2000 Mustang GT Vortech Supercharged 2002 SVT Focus 2002 Harley F 150 DSG 2003 BMW Z4 3.0L Si 2006 F250XLT 6.0L Powerstroke

12-31-2005, 01:42 PM	#33
Shankin Senior Member Join Date: Jul 2005 Posts: 339	Re: Tuning Problems. I would change out the mass air meter for a 90. I have seen the cams be a little off from the factory causing some cars to make less than normal also. __________________ Pro Speed Performance 770 222 5015

12-31-2005, 10:04 PM	#34
black_nightmare Junior Member Join Date: Dec 2005 Posts: 12	Re: Tuning Problems. Could the flattened curves and low power be indicative of a clogged catalytic converter?

12-31-2005, 10:38 PM	#35
Scothew Censored Jihad Join Date: Dec 2004 Location: B'ham, AL Posts: 4,108	Re: Tuning Problems. if it cant get the exhaust out, its defintely a possibility. You may try running a can of seafoam through the engine to clean it and the cats out. Do a search, i believe we have discussed it before on here. Also, whens the last time your fuel filter has been changed? __________________ Theres only one way to get to Carnegie Hall..... .... Practice.

01-01-2006, 02:07 PM	#37
TheJeanyus Administrator Join Date: Dec 2004 Location: Huntsville, AL Posts: 14,774	Re: Tuning Problems. I've heard of cars leaving the factory with the carpet in the way of the gas pedal or something and not being able to truly achieve WOT. __________________ 1998 Mustang GT Coupe - World's Slowest Racecar 2005 Toyota 4Runner SR5 V8 2013 Volkswagen Jetta Sportwagen TDI

01-02-2006, 01:21 PM	#39
black_nightmare Junior Member Join Date: Dec 2005 Posts: 12	Re: Tuning Problems. Well the cats seem to be flowing fine. I had a pressure test done on the cats. It showed no blockage. Anyone have any other ideas?

01-02-2006, 02:18 PM	#40
black_nightmare Junior Member Join Date: Dec 2005 Posts: 12	Re: Tuning Problems. I spoke with the tuner again. He mentioned that the 2003 GT that this tune was originally made for, achieved 180% load while mine only achived 140%. Both cars achieved 10 psi of boost at 5700 RPM. What would make the load be so different? The 2003 GT did have the later style MAF with the bar only protruding half way into the flow, while mine is the older style with the bar all the way across the meter. Is there a difference in the way these two meters read other than the newer stlye having the temperature sensor integrated into the meter?