3000GT/Stealth International Message Center - View Single Post - ---===The Official MAFT-Pro Thread===---

Barefoot · 09-20-2006, 01:24 PM

I am having some problems, and if ANYONE can help me with either of these, please help!

Problem #1 idle/cruise problem

I rewired my Maftpro becuase I was having alot of problems, which replacing the wires helped out tremendiously at idle, not so much at cruise.

While driving down the interstate at about 70 mph, 2500 RPM, 1.4 TPS, 40-50 MAP It will drive fine at a fairly rich 13-14 AFR. Then the car will start to buck. I took a long log of this happening at cant find anything wrong with whats going other than the AFR droping to 17+ AFR when It happens.

I was looking at everything that was going on, and the ONLY thing I can find is the Transient Response seems to mimic the jump in AFR. Isn't TR supposed to stay at 0 ALL THE TIME? it stays at a steady 0.09 when everything is fine, and will jump to .30-1.00. I can't tell if the TR is causing the rising AFR, or vise versa though.

Anyone know what could be causing this, how to fix it, or if TR is even causing any problems? I have EVERYTHING soldered in place with silver solder, and electrical tape over the solder.

Problem #2 WOT Knock

When I go WOT first of all, TPS never hits 5.00, it only goes as high as 4.93 Is this a problem?

My AFR at WOT range from 10.5 - 11.5 and never go over 11.5. Base timing is pulled ALL the way. Knock sensor is new and torqued to spec. The boost spikes to 10 psi and drops to 8 psi. In the log in the run done today, The TR never jumped above 0.09, AFR never went above 11.5, Timing dropped from 50-ish to 33-ish (TMO log), and I hit 14-ish counts of knock for a sustained time until I let off the gas. Only thing that seems odd on this run is that VE CELL would jump between 0 and 131.

Now, I am fairly certain I have a few small pre-TB boost leaks. Could this cause Knock with a Map Sensor, and rich AFR's?

Thanks for any help!

~Richard

::EDIT::

Logs added. Wasnt sure what anyone would want to look at, So I have an xls file with all the raw data, and a few charts of the WOT pull. Also have the adl file shich this session is session 8.

Right Click > save as

http://www.georgia3s.com/temp/123.adl
http://www.georgia3s.com/temp/log.xls

09-20-2006, 01:24 PM	#1546 (permalink)
Barefoot Racing Join Date: Jan 2003 Location: Ga Tech Drives: 92R/T - converted ;) Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- I am having some problems, and if ANYONE can help me with either of these, please help! Problem #1 idle/cruise problem I rewired my Maftpro becuase I was having alot of problems, which replacing the wires helped out tremendiously at idle, not so much at cruise. While driving down the interstate at about 70 mph, 2500 RPM, 1.4 TPS, 40-50 MAP It will drive fine at a fairly rich 13-14 AFR. Then the car will start to buck. I took a long log of this happening at cant find anything wrong with whats going other than the AFR droping to 17+ AFR when It happens. I was looking at everything that was going on, and the ONLY thing I can find is the Transient Response seems to mimic the jump in AFR. Isn't TR supposed to stay at 0 ALL THE TIME? it stays at a steady 0.09 when everything is fine, and will jump to .30-1.00. I can't tell if the TR is causing the rising AFR, or vise versa though. Anyone know what could be causing this, how to fix it, or if TR is even causing any problems? I have EVERYTHING soldered in place with silver solder, and electrical tape over the solder. Problem #2 WOT Knock When I go WOT first of all, TPS never hits 5.00, it only goes as high as 4.93 Is this a problem? My AFR at WOT range from 10.5 - 11.5 and never go over 11.5. Base timing is pulled ALL the way. Knock sensor is new and torqued to spec. The boost spikes to 10 psi and drops to 8 psi. In the log in the run done today, The TR never jumped above 0.09, AFR never went above 11.5, Timing dropped from 50-ish to 33-ish (TMO log), and I hit 14-ish counts of knock for a sustained time until I let off the gas. Only thing that seems odd on this run is that VE CELL would jump between 0 and 131. Now, I am fairly certain I have a few small pre-TB boost leaks. Could this cause Knock with a Map Sensor, and rich AFR's? Thanks for any help! ~Richard ::EDIT:: Logs added. Wasnt sure what anyone would want to look at, So I have an xls file with all the raw data, and a few charts of the WOT pull. Also have the adl file shich this session is session 8. Right Click > save as http://www.georgia3s.com/temp/123.adl http://www.georgia3s.com/temp/log.xls __________________ 92 Dodge Stealth R/T AWD/TT (TD05) converted ( 11.894 @ 120.56 - 18 psi -> Video ) Last edited by Barefoot : 09-20-2006 at 01:55 PM.