Still at a loss.
I've been having an idle problem with my car, "at times" haven't found any other threads regarding the same issues I'm having. Randomly at idle my car has stalled on me, twice. Besides that at lights it tends to drop down to a point where it wants to stall but almost revs itself back uoto 1k rpms. I've gotten a compression text and my engine checks out fine. Also cleaned the maf sensor and throttle body with no luck. This problem seems to be completely random. Anyone have this same issue? Won't be fuel pump but could it be the filter?
no CEL lights ever 65k miles 2010gt mt my only mods are turbo xs cat back and BHR ignition coils. |
What were the compression test results? Stalling could be something as simple as a vacuum leak.
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Time to start doing some data logging. Get RPM, MAF rate, STFT, AFR, throttle position... Whatever else sounds interesting.
I wonder what your fuel trim looks like as it stalls or does it's little RPM dip. |
Rotor 1 at 294.
7.6 7.7 7.7 At 300 8.6 7.7 7.8 at 303 8.4 7.7 7.8 rotor 2 at 299 8.4 8.0 8.4 at 297 8.2 8.8 8.4 at 300 7.9 8.4 7.7 |
Originally Posted by NotAPreppie
(Post 4839542)
Time to start doing some data logging. Get RPM, MAF rate, STFT, AFR, throttle position... Whatever else sounds interesting.
I wonder what your fuel trim looks like as it stalls or does it's little RPM dip. |
Numbers are not great on Rotor 1 but technically still good. But yeah seeing what your fuel trims are at warm idle might give us some clues.
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Originally Posted by 9krpmrx8
(Post 4839546)
Numbers are not great on Rotor 1 but technically still good. But yeah seeing what your fuel trims are at warm idle might give us some clues.
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I agree with 9k. The numbers from Rotor 1 aren't spectacular but I've seen much worse from engines that still run just fine.
Get a bluetooth OBD-II adapter (any $20 unit from amazon will work) and an app for your smartphone. I hear Torque is popular on Android and I like OBD Fusion and DashCommand on iOS. |
Originally Posted by NotAPreppie
(Post 4839552)
I agree with 9k. The numbers from Rotor 1 aren't spectacular but I've seen much worse from engines that still run just fine.
Get a bluetooth OBD-II adapter (any $20 unit from amazon will work) and an app for your smartphone. I hear Torque is popular on Android and I like OBD Fusion and DashCommand on iOS. |
If you are looking at Bluetooth adapters, be careful. Some are ISO and Adroid specific.
I have an IPhone and use OBD Fusion (paid version) $10.00. For the adapter I went with this one : Some of the cheap $9.00 - $12.00 adapters don't capture all the data the more expensive ones do. Mine will pretty much tell you everything you need to know, fuel trims ST and LT, 02 readings, A/F, MAF readings and many many more. For less then $30.00 you can have a pretty rockin' backyard scanner. |
gotta feeling it's vacuum leak, hunt it down.
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Originally Posted by Dave04
(Post 4839608)
If you are looking at Bluetooth adapters, be careful. Some are ISO and Adroid specific.
I have an IPhone and use OBD Fusion (paid version) $10.00. For the adapter I went with this one : https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 Some of the cheap $9.00 - $12.00 adapters don't capture all the data the more expensive ones do. Mine will pretty much tell you everything you need to know, fuel trims ST and LT, 02 readings, A/F, MAF readings and many many more. For less then $30.00 you can have a pretty rockin' backyard scanner.
Originally Posted by Okki-Jakarta
(Post 4839615)
gotta feeling it's vacuum leak, hunt it down.
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im not really familiar with this but there's a smoke technique. look it up
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Bought one of those readers, in mail as of yesterday. Cleaned the throttle body and a huge amount of corrosion off one of the terminals on my battery and it idles a lot better still a little jumpy but I might have narrowed it down some
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