about a week ago i recieved my complete delta 44 kit in the mail. the install went smooth and i followed all of AGP's directions on how to install it. the kit came with an SCT flash device and that seemed to go on the car easy too. i started the car, let it idle and learn the computer, and then proceeded to drive it. i broke in the kit and then went WOT. on 18 psi the car will only go to 5000 rpm and then will just stop. not a sudden stop but its almost like someone is taking my foot off the gas even though im still WOT. i contacted AGP about the problem and they sent me another tune saying that the tune i put on the car was an "incomplete tune". i put the tune on my car and still nothing. i thought maybe that the 750cc injectors had been working too hard so i pulled up injector duty cycle on my scan gauge and it never went over 51.0 so it was fine there. then i proceeded to reset the computer to the stock tune and turned the boost down to about 9-10 to see if it was the sct flash device they gave me. well i remembered that i needed to change the TIP and MAP sensors back to stock if i was going to run the stock tune again so i put the battery cable back on the car (im not sure when you take the cable off if it puts the tune back to stock or keeps the SCT flash on). i drove the car on 9-10 psi and went WOT and it went all the way to redline. the A/F was still in the 10's so i proceeded to turn up the boost. i noticed that the higher the boost the lower it will allow my rpm's to go. for example: at 13 psi it will stop going at around 5700 rpm, at 15 psi it will stop going around 5400-5500 rpm and at 18 psi it will stop going at 5000 rpm. i called AGP back and explained that its still doing the same thing and explained the the higher the boost the lower the rpm and they told me it was an ignition problem. i then called on of my friends who has a delta 44 srt and we switched my igniton box, wires, and plugs with the ones on his car. still nothing. i checked all the vac lines and had my friend double check them. at this point im completly lost. i emailed agp again with a huge story on what it keeps doing. too bad there closed over the weekends. any suggestions? sorry for the long rant lol
No disconnecting the battery will not return you to stock, there is no need to disconnect the battery, every time you flash, the PCM memory is erased. To return to stock, you need to use the "Return to stock" option on the SCT XCal2.
Trying to bring up my dyno pulls from Saturday to double check, but this actually sounds similar to what I was seeing on the dyno tuning my own car.
Static fuel pressure? Or rising rate?
*EDIT*
Ok just went back and checked my dyno graphs from Saturday.. see my other post in this section titled "Can't get fuel above 5K", I was just going off memory on that post, now I have the graphs to look at.
I have a flat AFR line until a certain RPM on every pull, then it jumps to lean. Littlerally looks like this: ______/
I'd post the graphs but I can't get to any pic hosting sites from work.
I was focusing on trying to get rid of it going lean up top first, and never got to the point where I would try to lean it up in the low to mid range.
This is what I see. With boost leveling out at 10psi (get full boost in the 3400-3600RPM range), Flat 10:1 AFR until 5350RPM then it starts to go lean, at 5550RPM it's at 12:1, 5700RPM it crosses 13:1.
Next pull, holding 12psi, 10:1 until 5275RPM, 12:1 right at 5500, 13:1 at 5650.
Go to 15psi, flat line 10:1 until 4850, 12:1 at 5050, 13:1 at 5200.
One of the first pulls before I started messing with things, holding 19psi AFR was in the 11.3-11.7:1 range until 4850RPM then it shot up above 12:1 and we let off ending the pull. At that point I started adding fuel in up top at that range but nothing happend. After that I started messing with the boost. After each pull I'd try to add fuel where it went lean, and nothing happend.
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One of a kind custom turbocharged 2004 Chrysler Sebring LX Sedan
.:CarDomain:.
13.5 @ 102mph
Last edited by SebringLX : 04-06-2009 at 09:55 AM.
Problem is the same as your other thread. You are running out of fuel volume. You can put more injector pulsewidth in until you are blue in the face, the fact remains that you are out of fuel volume. That is most likely due to your FPR issue, but it could also be a leak in the tank from your fuel canister, or a failing fuel pump, or a clogged filter/fuel sock, etc, etc.
Problem is the same as your other thread. You are running out of fuel volume. You can put more injector pulsewidth in until you are blue in the face, the fact remains that you are out of fuel volume. That is most likely due to your FPR issue, but it could also be a leak in the tank from your fuel canister, or a failing fuel pump, or a clogged filter/fuel sock, etc, etc.
I'm going to lean more towards leak or clogged fuel sock then. This car has a 190lph Walbro as it's stock pump in the tank, and an external Walbro 255lph run in-series with that pump. That should flow way more volume than I'll ever need with this turbo. The external pump only has 4000 miles on it. The internal pump has 44000... I could pull the fuse on the external pump to find out if the internal is dead. Even if that pump is dead, the 255 should flow enough on it's own... although the dead pump would create a restriction. I suppose trying to fix the FPR issue would be the first step before trying to chase it being something else.
No disconnecting the battery will not return you to stock, there is no need to disconnect the battery, every time you flash, the PCM memory is erased. To return to stock, you need to use the "Return to stock" option on the SCT XCal2.
Trying to bring up my dyno pulls from Saturday to double check, but this actually sounds similar to what I was seeing on the dyno tuning my own car.
Static fuel pressure? Or rising rate?
*EDIT*
Ok just went back and checked my dyno graphs from Saturday.. see my other post in this section titled "Can't get fuel above 5K", I was just going off memory on that post, now I have the graphs to look at.
I have a flat AFR line until a certain RPM on every pull, then it jumps to lean. Littlerally looks like this: ______/
I'd post the graphs but I can't get to any pic hosting sites from work.
I was focusing on trying to get rid of it going lean up top first, and never got to the point where I would try to lean it up in the low to mid range.
This is what I see. With boost leveling out at 10psi (get full boost in the 3400-3600RPM range), Flat 10:1 AFR until 5350RPM then it starts to go lean, at 5550RPM it's at 12:1, 5700RPM it crosses 13:1.
Next pull, holding 12psi, 10:1 until 5275RPM, 12:1 right at 5500, 13:1 at 5650.
Go to 15psi, flat line 10:1 until 4850, 12:1 at 5050, 13:1 at 5200.
One of the first pulls before I started messing with things, holding 19psi AFR was in the 11.3-11.7:1 range until 4850RPM then it shot up above 12:1 and we let off ending the pull. At that point I started adding fuel in up top at that range but nothing happend. After that I started messing with the boost. After each pull I'd try to add fuel where it went lean, and nothing happend.
its not even leaning out at higher rpm's its still in the high 10's. its almost like someone is taking my foot right off the gas
Oops! Got you mixed up with the other thread. It could be an ignition issue. More likely you have a bunch of knock, and the timing is being retarded. Do you have a scan gauge to look at the KR?
Oops! Got you mixed up with the other thread. It could be an ignition issue. More likely you have a bunch of knock, and the timing is being retarded. Do you have a scan gauge to look at the KR?
i know this thread is a few monthes old but im still having this problem. and yes i do have a scan gauge and its not reading any knock. im completely lost on what it is. ill try and get a video of what it is doing up so you can understand what im trying to say. its not leaning out, ive changed the plugs, wires, coil pack, done a fuel pressure check, the injector duty cycle is only at 55-60%, im running 3 bar tip and map, and changed the tune many times. the only thing i think it could be now is a bad pcm. maybe the sct messed it up or something?
If you have a timing light with an adjustable (preferably digital) advance, and a scan gauge, it is relatively easy. With the engine idling, look at the total advance on the scan gauge. Set the timing light to that number. Pull the small plastic plug out of the side of the timing cover. Shine the timing light in there. If the two lines on the timing gears line up together, then it is in time. If not, well, you have a problem.
If you have a timing light with an adjustable (preferably digital) advance, and a scan gauge, it is relatively easy. With the engine idling, look at the total advance on the scan gauge. Set the timing light to that number. Pull the small plastic plug out of the side of the timing cover. Shine the timing light in there. If the two lines on the timing gears line up together, then it is in time. If not, well, you have a problem.
ok thanks man ill check it out. ill try and post up a video as soon as i can to describe what is going on with the car so you can get a better idea because it is very hard to explain.
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confusing problem
Linear Mode
