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Old 09-02-2008, 06:06 AM   #1
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Default Help!! With "fuel cut"

Hey there. If anyone could give me some advice that'd be great. I've had my car for 5 years now and just recently did the 550cc injector and lexus afm upgrade. Here is the symptoms I'm having: Car runs a bit too rich. It smokes black real bad at the initial crack of the throttle then clears out. I feel like I've actually lost power since the upgrade and I keep experiencing "fuel cut" here and there when I down shift. It's only when i put a big sudden load on the engine. It doesn't happen through smooth acceleration. Can anyone give me advice on tuning the air fuel? Or maybe where to time it? I haven't touched the timing and I'm wondering if I need to. I've given the computer PLENTY of time to adjust also.. Thank you!
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Old 09-03-2008, 09:40 AM   #2
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Anyone had this problem before? I'm trying to find anything on the web that will help but I'm striking out
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Old 09-05-2008, 02:14 AM   #3
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I don't have this problem because I have the non turbo model, I don't think it comes with the fuel cut device. As for the black smoke it could be rich but are you losing any oil? I know with my older Honda a while back the rings were gone and it pored black smoke out. Check compression on your cylinders first, black smoke can mean a mess of troubles. If you don't have a compression gauge they are pretty cheep and they can tell a lot about your internals. It is always good to have one. Wait around for a experienced turbo guy for the fuel cut question. I hope this helps a little bit.
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Old 09-05-2008, 02:33 AM   #4
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Quote:
Originally Posted by suprabahamut View Post
I don't have this problem because I have the non turbo model, I don't think it comes with the fuel cut device. As for the black smoke it could be rich but are you losing any oil? I know with my older Honda a while back the rings were gone and it pored black smoke out. Check compression on your cylinders first, black smoke can mean a mess of troubles. If you don't have a compression gauge they are pretty cheep and they can tell a lot about your internals. It is always good to have one. Wait around for a experienced turbo guy for the fuel cut question. I hope this helps a little bit.

Hey thanks man. The black smoke I have is definitely just unburned fuel. It's running very rich. I don't know if it's a problem with the new AFM or what? That's why I was considering advancing the timing a bit but I don't know if I should. And also I did a compression test not too long ago and everything is peachy. So yeah I'm just waiting for that good turbo guy to point me in some direction. I'm fully capable I just don't know where to start lol. thanks again
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Old 09-05-2008, 01:09 PM   #5
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you have to check engine codes for starters

pull the codes we know you'll have a #34 but what other codes are you getting ?
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Old 09-06-2008, 12:31 AM   #6
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you have to check engine codes for starters

pull the codes we know you'll have a #34 but what other codes are you getting ?
Ok so I'm getting code 32 which is HAC sensor in my year. Code 34 you already knew that. And code 42 which confuses me because my book says speed sensor? And I don't have a speed sensor. But my car was a non turbo model I converted to turbo years ago.
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