Extremely rich under boost

[seth98es]

This is not my car, it is my friends Galant. His mod list:

http://www.dsmtuners.com/forums/member.php?find=lastposter&t=256307

The car was running fine yesterday then we decided to install an Aeromotive 1:1 AFPR on his car to replace the cheap AFPR/gauge that he had previously installed. We used a -6AN push lock rail to regulator line and the same line to go back to the stock hard return line. We then set the base FP with the car off but fuel pump running to 43psi as that is what Jeff set his keydiver chip to.

Starting the car cold, the idle will be a steady 1000rpm but it will be rich, 11-12.9 on the AEM Uego. Once the car warms up and we drive it for a few minutes, the idle will start to surge 500-1000rpms but will be more lean 14.0-15.5. Not sure if its listed in his profile, but there is NO ISC on this car, its blocked off with the JMFab blockoff plate. I have the same plate on my car and it idles perfectly at 14.7AFR and does not surge one bit. Vacuum is a good 20+ at idle as well.

Now driving under WOT, as soon as you get out of vacuum and even approach boost, the wideband automatically goes to 10.0 which is the richest it can read. In first gear, there is no pull, it is just way to rich. Second gear will pull a bit but its still at 10.0 on the wideband and doesnt pull that hard but you can hear the wastegate open, same with 3rd gear.

Previously before we changed anything, it would pull just fine and never go richer then 10.7 in any gear. The only thing we did was swap out the AFPR with the Aeromotive and removed the coilpack to get to everything.

We have swapped out his Aeromotive with mine just to make sure nothing was wrong with his, but we had the exact same problem. There are no boost leaks or vacuum leaks. We adjusted the TPS since it wasnt quite adjusted to 10% but that did not fix anything. I am going to go install the old AFPR just to do so as we are out of things to try. Any help or suggestions would greatly be appriciated!

 

[jking29]

Did you unplug the vacuum line when you set the base pressure?

 

[seth98es]

Car was off, fuel pump was going, shouldnt matter. We tried both setting the base FP to 43psi and 38psi with the Aeromotive but it made no difference in how the car pulled under boost.

I just got done installing the old AFPR on the car and its back to normal, 10.5-10.7 under WOT. I dont know why this would be, the Aeromotive is the better regulator. The old regulator he has has smaller diameter inlets and outlets and a cheap FP gauge, the main reasons he wanted to swap it with the Aeromotive and a B&M gauge.

Why would it be pig rich with the Aeromotive and fine with the old regulator which shouldnt flow as well, both set at the same FP. Puzzles me :/

 

[SleeperG]

ok so let me sum this up, cause its my car.

as of this weekend,
i have zero boost leaks.
i can pressurize it and walk away for 20 minutes and it will hold pressure.
i have zero exhaust leaks.
my base pressure is set correct to 43 psi on my 1g ecu(jeff o burned my chip specificly for this pressure). It was set using the proper procedure.

my wideband sensor is relatively new and in perfect working condition.
i have zero cels.
i have a brand new coolant temp sensor,
my tps is set correctly
i have a brand new knock sensor.
my turbo is in perfect condition(not that it shoudl matter)
my timing is dead on (mechanical and ignition)


and still....
i'm pegging my aem wideband at 10:1 (as rich as it reads)
and making no power.


any ideas?
doesn't make any sense to me.

maybe i need to post some logs.

 

[GVR4592]

Edit: Just noticed the part about the chip, so what I suggested won't work

 

[GVR4592]

I remember reading somewhere that the Aeromotive regulators leak from the adjustment screw and sometimes from the vacuum fitting. Did you do the boost leak test with the Aeromotive regulator installed or the old regulator installed?

Also when you set the fuel pressure the engine should be running because the voltage at the pump will be higher.

 

[SleeperG]

ok since your right and the voltage isn't the same at idle as it is with the engine off, i set the base pressure with the engine idle and the hose off, instead of with the engine off and B+ to the fuel pump check terminal.
it was about 1 psi off.
i had thread tape on the nipple to the regulator, and now i have thread tape on the threads of the adjustment bolt on the top of the regulator.

my a/f hasn't changed a bit.

I mean it didn't change at all.

still pegging ot 10:1 on the aem.

where else to look?
any suggestions? Ideas?