slight issues on the dyno - Emanage Ultimate
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It's an AP1, 2001 with the 2L engine. Also, it's a single exhaust that goes turbo back, no resonator or cat; however, it as my first attempt at welding and I know it's not 100% sealed so that's why I'm thinking my tuner's original thoughts make sense.
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Originally Posted by s2000Junky,Jun 3 2009, 01:24 PM
Its an issue with the sniffer and our exhaust not your actual afr. I've been in the same boat before. You wont get an accurate WOT afr measurment with a sniffer, you need to have him hook up his 02 sensor to where you hook up yours for your wideband just after the header, this is assuming you have one, if you dont then you need to get one, at the very least you need a bung welded in for a hook up and just cap it off with a bolt when driving.
I should be taking this in some time in the next couple of weeks when I have some free time to get an o2 bung welded on, but I'm just thinking if I do take it in and have the bung welded next to the stock o2 sensor and it STILL reads a spiking lean afr. What else could be the problem?
Would it be something with the EMU?
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Originally Posted by skool u,Jun 2 2009, 09:38 AM
Well, I again tried to take my car to the dyno with no conclusive results. My tuner is fairly new to the whole tuning with Emanage Ultimate; however, he's a very competent tuner. In any case, we were on there and he had the probe in the tailpipe and upon getting a really good idle tune and partial tune to about 3-4 K, the problem came when trying to tune WOT. When I got on it and the boost kicked in, it would spike to 19 afrs so we'd shut it down.
He is saying that one possible problem may be the welding job. It was my first attempt at welding and there were some pinholes and he is saying that as the exhaust is shooting out, it's drawing in some air from around the hole thus leaning out the mixture going to the probe. I now need to weld on another O2 bung by the turbo on the downpipe to see if this is accurate.
Another person was questioning if the Ultimate is fighting with the stock ECU making them lean out; however, the fuel pressure remains constant at 55 psi and when my tuner added more fuel, the tq shot up to around 150 ft/lbs at around 3-4 K right before I shut it down.
Anyways, I'm a bit stumped but it sounds like the leaning out is caused by the pinholes, but if anyone else can offer any other advice, that ould be awesome!
Cheers.
He is saying that one possible problem may be the welding job. It was my first attempt at welding and there were some pinholes and he is saying that as the exhaust is shooting out, it's drawing in some air from around the hole thus leaning out the mixture going to the probe. I now need to weld on another O2 bung by the turbo on the downpipe to see if this is accurate.
Another person was questioning if the Ultimate is fighting with the stock ECU making them lean out; however, the fuel pressure remains constant at 55 psi and when my tuner added more fuel, the tq shot up to around 150 ft/lbs at around 3-4 K right before I shut it down.
Anyways, I'm a bit stumped but it sounds like the leaning out is caused by the pinholes, but if anyone else can offer any other advice, that ould be awesome!
Cheers.
Why was the idle a problem, you shoud have been able to just input the CC and lag time pretty quickly. Assuming you only have added a small turbo you should not be tuning for any situation below the map sensor voltage of 2.85V.
I think you need to do some more research.
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Bad fuel pump?
Do you have the walbro in there?
Something is really wrong here and it isnt your exhaust. It also sounds like your tuner has no clue, which is not good. He should be aboe to trouble shoot things a little better.
I never head a problem with lean with my ultimate only intermitent rich conditions. Check your E manage connections (unplug and replus the connections) You may also have a bad MAP sensor possibly..?
Do you have the walbro in there?
Something is really wrong here and it isnt your exhaust. It also sounds like your tuner has no clue, which is not good. He should be aboe to trouble shoot things a little better.
I never head a problem with lean with my ultimate only intermitent rich conditions. Check your E manage connections (unplug and replus the connections) You may also have a bad MAP sensor possibly..?
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Originally Posted by dsddcd,Jun 7 2009, 08:01 PM
Your exhaust is not running in a vacuum so how is air getting in?
Why was the idle a problem, you shoud have been able to just input the CC and lag time pretty quickly. Assuming you only have added a small turbo you should not be tuning for any situation below the map sensor voltage of 2.85V.
I think you need to do some more research.
Why was the idle a problem, you shoud have been able to just input the CC and lag time pretty quickly. Assuming you only have added a small turbo you should not be tuning for any situation below the map sensor voltage of 2.85V.
I think you need to do some more research.
In any case, the idle is no longer an issue. I was able to get it to the tuner and we were able to get it idling very nicely and it's great at part throttle, however, upon boosting, it runs straight to lean and that's now the issue. My tuning is very, VERY limited and my tuner is theorizing that the welding job may be introducing air into the intake exhaust stream and that's why it's running lean, but I just want to know that if that's not the problem why it's running lean, is there something on the EMU that I'm overlooking.
Thanks again for the help lads.
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Originally Posted by TRBOKEV,Jun 7 2009, 08:52 PM
Bad fuel pump?
Do you have the walbro in there?
Something is really wrong here and it isnt your exhaust. It also sounds like your tuner has no clue, which is not good. He should be aboe to trouble shoot things a little better.
I never head a problem with lean with my ultimate only intermitent rich conditions. Check your E manage connections (unplug and replus the connections) You may also have a bad MAP sensor possibly..?
Do you have the walbro in there?
Something is really wrong here and it isnt your exhaust. It also sounds like your tuner has no clue, which is not good. He should be aboe to trouble shoot things a little better.
I never head a problem with lean with my ultimate only intermitent rich conditions. Check your E manage connections (unplug and replus the connections) You may also have a bad MAP sensor possibly..?
This is my tuner's first go at emanage ultimate and he is a VERY good tuner. He's been doing it for at least 15 years I reckon and is AEM certified and I have the utmost confidence in him; however, as I said, it is the first time he's had a go at the EMU so we'll have to be a bit patient as I've seen many threads where even the best tuners have some hiccups trying to tune the EMU. He's done an awesome job with the idle and low throttle response that it's essentially stock. No issues there, it's just while in boost.
I'll look into the map sensor issue, but I'm not sure exactly how to check that. I'll run it by him as well when I go back with the extra bung welded on.
Cheers again for the input!
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[QUOTE=s2000Junky,Jun 8 2009, 08:04 AM] Yeah it could go to 19afr, mine read off the chart which was 18 and beyond. I would be surprised if you have an actually issue, I believe its an issue with the sniffer and your exhuast like mentioned, but
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Originally Posted by skool u,Jun 7 2009, 09:07 PM
The walbro is in and I can hear it prime when I turn the key to ign. Hear it whine a bit too, but barely audible over the exhaust hmmm.
This is my tuner's first go at emanage ultimate and he is a VERY good tuner. He's been doing it for at least 15 years I reckon and is AEM certified and I have the utmost confidence in him; however, as I said, it is the first time he's had a go at the EMU so we'll have to be a bit patient as I've seen many threads where even the best tuners have some hiccups trying to tune the EMU. He's done an awesome job with the idle and low throttle response that it's essentially stock. No issues there, it's just while in boost.
I'll look into the map sensor issue, but I'm not sure exactly how to check that. I'll run it by him as well when I go back with the extra bung welded on. Cheers again for the input!
This is my tuner's first go at emanage ultimate and he is a VERY good tuner. He's been doing it for at least 15 years I reckon and is AEM certified and I have the utmost confidence in him; however, as I said, it is the first time he's had a go at the EMU so we'll have to be a bit patient as I've seen many threads where even the best tuners have some hiccups trying to tune the EMU. He's done an awesome job with the idle and low throttle response that it's essentially stock. No issues there, it's just while in boost.
I'll look into the map sensor issue, but I'm not sure exactly how to check that. I'll run it by him as well when I go back with the extra bung welded on.
Cheers again for the input!Do you have the Greddy map to compair? If not I can send it or I can look at yours for issues. Are you using the Greddy pressure sensor and AEM wideband?