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Old 11-27-2014, 02:51 PM   #1
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Default Maxed out injectors

So I've tried searching and can't find the answer to my question. What does it feel like to max out your injectors? Is there a physical feeling in the engine? The reason I ask is, if I wot I get to 4000 rpm and car doesn't go faster. Speed stays the same and Rpms stay around 4000. It kind of seems like a slipping clutch. If it was the clutch slipping, wouldn't the rpms rev higher? If I'm easy on the throttle it drives normal. So Would this be what maxing out injectors "feel" like? Or something else?
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Old 11-27-2014, 03:08 PM   #2
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Quote:
Originally Posted by Claybay09 View Post
So I've tried searching and can't find the answer to my question. What does it feel like to max out your injectors? Is there a physical feeling in the engine? The reason I ask is, if I wot I get to 4000 rpm and car doesn't go faster. Speed stays the same and Rpms stay around 4000. It kind of seems like a slipping clutch. If it was the clutch slipping, wouldn't the rpms rev higher? If I'm easy on the throttle it drives normal. So Would this be what maxing out injectors "feel" like? Or something else?
Finding a maxed out injector is easy -- data log the ECU and look at the max duty cycle you've used.

Maxed out fuel pumps manifest as a lean spot that doesn't go away when you increase the injector duty cycle in those zones.

--Ian
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Old 11-27-2014, 03:20 PM   #3
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The only problem is im on aids. Maybe I should have mentioned that. So no ecu
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Old 11-27-2014, 03:42 PM   #4
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Maxing out your injectors feels like looking at your wideband and seeing your AFRs going too lean

Edit: you said you're on band aids, do you have a wideband at all?

Last edited by Onyxyth; 11-27-2014 at 04:59 PM.
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Old 11-27-2014, 05:48 PM   #5
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I'm working on it
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Old 11-27-2014, 05:53 PM   #6
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Old 11-27-2014, 08:45 PM   #7
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Maxing out your injectors feels like detonation in boost and a loss of power that accompanies the pistons and rings breaking. What does your wideband say when the car stops accelerating?
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Old 11-27-2014, 09:02 PM   #8
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Wideband? Who needs a wideband?
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Old 11-27-2014, 10:23 PM   #9
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God damn noobs!
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Old 11-28-2014, 03:00 PM   #10
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Or could it possibly be spark blow out?
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Old 11-28-2014, 03:48 PM   #11
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It could also be the fuel pump dieing
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Old 11-28-2014, 06:30 PM   #12
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Don't worry wideband is in the mail!
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Old 11-28-2014, 07:48 PM   #13
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Plugged up cats could do this as well (if you have one)
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Old 11-28-2014, 07:59 PM   #14
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Who turbos without a wideband? That's not good.
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Old 11-28-2014, 08:09 PM   #15
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Apparently dumb *** noobs with no money and couldn't wait. Now feeling the consequences. I'm just waiting for the " I told you so noob!" Haha
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Old 11-28-2014, 09:54 PM   #16
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I would never.
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Old 01-02-2015, 08:39 PM   #17
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So I finally have a wideband and a boost gauge. When this "happens" AFR goes full lean when I'm at 8 psi, which is what the internal wastegate is. My aids are as follows: msd retard box, stock 1.8 tan top injectors, and a 1:8 fmu. Also idle is stupid rich between 11.5-12.5.
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Old 01-02-2015, 10:35 PM   #18
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How have you not melted anything yet?
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Old 01-02-2015, 10:58 PM   #19
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Quote:
Originally Posted by Claybay09 View Post
So I finally have a wideband and a boost gauge. When this "happens" AFR goes full lean when I'm at 8 psi, which is what the internal wastegate is. My aids are as follows: msd retard box, stock 1.8 tan top injectors, and a 1:8 fmu. Also idle is stupid rich between 11.5-12.5.
Is your FMU hooked up to a good vac/boost reference? Kinda sounds like its pressure port is open to atmosphere. You need a fuel pressure gauge.
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Old 01-02-2015, 11:19 PM   #20
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Yes the extra nipple on the im, right after the tb.

Last edited by Claybay09; 01-02-2015 at 11:32 PM. Reason: Photo fail
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