Rebuild Head, now problems.. Need your help badly.
May 21, 2008, 07:07 AM
#19
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Erioshi: Oh, my mechanic mentioned something about that sensor possibly being in the wrong position then refuted that because he thought it wouldn't run. Hmmm. i'll have to flip the sensor and see if it improves. thanks man.
And the people at TT are really good, they've been very helpful in the past.
And the people at TT are really good, they've been very helpful in the past.
May 21, 2008, 06:16 PM
#20
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ok, flipped the sensor 180deg. Throttle response improved, it runs better. Same problem still exists though, the car has a VERY lean AFR reading (max out my aem wideband in the lean direction around 16 or 17) when it begins to sputter at around 10psi. I don't want to drive it with that reading. Although, the first run after I started it back up and ran it, it boosted normally and ran well. Then after I slowed back down and did another 3rd gear pull it went back to doing the sputter and ran very lean. Balance shafts... hmm, I would I go about seeing if they were 180deg out? I don't want to take it back to that mechanic, i'm going to find someone with more experience w/ dsm. More advice..
And, i'll check the plug wires. Would it even run with them in the wrong position?
And, i'll check the plug wires. Would it even run with them in the wrong position?
Last edited by jutilat; May 21, 2008 at 06:19 PM.
May 21, 2008, 09:19 PM
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Check your vacuum line to your fuel pressure regulator. Also check your MAP sensor. If the problem only shows up when you boost then something isn't responding properly to the increased boost. The two most obvious would be fuel pressure or airflow measurement (assuming you are running speed density with your AEM).
-Paul
-Paul
May 21, 2008, 09:28 PM
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mike- Yes, i stopped boosting. Ofcourse. Hell, i've stopped driving it.
The vacuum line line to the fuel pressure regulator is on there. The sensor that the aem scans to get engine temps, is that the same one that is referred to your gauge cluster on the dash, or a different sensor? I'll check my AEM and see if I'm getting any weird readings/ any readings at all. I have to get my macbook set up to run windows via bootcamp. Might be a day or so. I notice that it started idling very high, too. Around 2k, maybe this all has to do with the car thinking it is cold. Why would my fuel mixture be very lean if it thought it was cold, it would be injecting more fuel, thus, making it richer. It's all weird..
The vacuum line line to the fuel pressure regulator is on there. The sensor that the aem scans to get engine temps, is that the same one that is referred to your gauge cluster on the dash, or a different sensor? I'll check my AEM and see if I'm getting any weird readings/ any readings at all. I have to get my macbook set up to run windows via bootcamp. Might be a day or so. I notice that it started idling very high, too. Around 2k, maybe this all has to do with the car thinking it is cold. Why would my fuel mixture be very lean if it thought it was cold, it would be injecting more fuel, thus, making it richer. It's all weird..
May 22, 2008, 03:32 PM
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I have new plugs in the car as well. What would be the proper gap for my setup or would it even change from stock? Could this be a part of the problem? I'm also going to do a compression check.
May 23, 2008, 02:57 PM
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How can the balance shafts be out of phase if they were never touched in the rebuild? I know one is near the oil pump and then there is one deeper in the engine. Hmm. I did ask my mechanic and he said there's no way. He's been wrong before so I'm not sure.