rage941
08-02-2011, 09:29 PM
I just bought an s13 with an rb25det and an aem series 1. I have a few questions. Sorry it's a bit of a read.
The air/fuel ratios weren't too bad, but weren't perfect. With the ac on the idle was kind of rough. With out the ac on it idled around 10.5. Also while cruising, it would be at like 13.9-15.0 and then you would feel the car sort of hiccup and then it would go down to 11.7-11.9. Also when you started it up you'd have to keep revving it or it would die. So I figured I get a retune and sort everything out. Well the car has only had the "street tune" part and is still awaiting the dyno tune. So far the afrs are even more messed up then before. They're ALL over and it's more sporadic now and nothing is consistent. Idle got as rich as 10.0 (does the gauge go lower than that?) and cruising got very lean too at some points. So needless to say I don't have as much faith in the tuner as when I went in. I'm going to give him another chance with the dyno tomorrow simply because everyone in this area goes to him and everyone has good things to say about him...He's been in the business a long time, built a lot of race cars, and tuned plenty of AEM cars, skylines, supras, etc. One supra he has now is making 1000hp.
Here's where the questions start. After he messed with it, the AC stopped working at idle. It works when you drive but not at idle. He thinks its a problem with the ac system. However I think it's too much of a coincidence. Is there something in the tune that he could have messed up to cause that?
Second thing is it got really hot driving on the highway. It got to like 210. It never did that before he messed with it. So, same question: is there something he could have done with the tune to cause that?
Last question is does anyone have any idea what could be causing that "hiccup" I mentioned when you're cruising? It'll be at 13.9-15 and then it kind of feels like someone kicks you in the back and then it goes to high 11s and stays there for a little bit and then goes back to what it was before.
I appreciate any input, and let me know if there is a better section for this. I didn't see any tuning/electronics section.
The air/fuel ratios weren't too bad, but weren't perfect. With the ac on the idle was kind of rough. With out the ac on it idled around 10.5. Also while cruising, it would be at like 13.9-15.0 and then you would feel the car sort of hiccup and then it would go down to 11.7-11.9. Also when you started it up you'd have to keep revving it or it would die. So I figured I get a retune and sort everything out. Well the car has only had the "street tune" part and is still awaiting the dyno tune. So far the afrs are even more messed up then before. They're ALL over and it's more sporadic now and nothing is consistent. Idle got as rich as 10.0 (does the gauge go lower than that?) and cruising got very lean too at some points. So needless to say I don't have as much faith in the tuner as when I went in. I'm going to give him another chance with the dyno tomorrow simply because everyone in this area goes to him and everyone has good things to say about him...He's been in the business a long time, built a lot of race cars, and tuned plenty of AEM cars, skylines, supras, etc. One supra he has now is making 1000hp.
Here's where the questions start. After he messed with it, the AC stopped working at idle. It works when you drive but not at idle. He thinks its a problem with the ac system. However I think it's too much of a coincidence. Is there something in the tune that he could have messed up to cause that?
Second thing is it got really hot driving on the highway. It got to like 210. It never did that before he messed with it. So, same question: is there something he could have done with the tune to cause that?
Last question is does anyone have any idea what could be causing that "hiccup" I mentioned when you're cruising? It'll be at 13.9-15 and then it kind of feels like someone kicks you in the back and then it goes to high 11s and stays there for a little bit and then goes back to what it was before.
I appreciate any input, and let me know if there is a better section for this. I didn't see any tuning/electronics section.