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In Reply to: Re: fuel cut override or a way to fool the ecu?, Landjet [Profile/Gallery] , Fri, 24 Jul 2009 05:22:59

Thanks guys.

Enough fuel is definitely not the problem. At one point while dialing in the RRFPR I was pushing a steady 90psi through the injectors at 18psi boost just to see if maybe I had a weak fuel pump--I still got the flutter sensation. The engine doesn't cut out totally like hitting a wall, it quickly cycles between what feels like on/off when the boost rises too quickly. The boost gauge flutters with it. The car will still accelerate, but it pauses and lurches rapidly. But only when approaching 16-18psi boost. That's what makes me think it's pressure/APC related. I'll give the MAF resistor mod a shot and see if things improve.

I'm running 22psi boost in my '94 Comm Ed with 431s, JSP chip, yadda, yadda... and it's not having the same issue.

My turbo Mopar has a RRFPR in it (plus a bunch of other mods) and I'm running 26psi in that car. The difference is that that car has a MAP sensor that reads pressure and sends a signal to the ECU to cut fuel at 14psi. I simply added a bleed on the vac signal line to the MAP to raise the cutoff pressure. I was wondering if there was something similar I could do with the Saab setup.

posted by 64.128.17...

• fuel cut override or a way to fool the ecu?, turbocon86, Thu, 23 Jul 2009 13:52:15
  • Re: fuel cut override or a way to fool the ecu?, Justin VanAbrahams , Thu, 23 Jul 2009 14:22:59
    • Re: fuel cut override or a way to fool the ecu?, turbocon86, Thu, 23 Jul 2009 18:46:58
      • Re: fuel cut override or a way to fool the ecu?, Landjet , Thu, 23 Jul 2009 21:04:31
        • Re: fuel cut override or a way to fool the ecu?, Justin VanAbrahams , Fri, 24 Jul 2009 00:12:41
          • Re: fuel cut override or a way to fool the ecu?, Landjet , Fri, 24 Jul 2009 05:22:59
            • Re: fuel cut override or a way to fool the ecu?, turbocon86, Fri, 24 Jul 2009 06:46:28 <-- Viewing This Message
              • Re: fuel cut override or a way to fool the ecu?, Landjet , Fri, 24 Jul 2009 10:53:12
                • Nice! Thanks Landjet, i'll check mine tomorrow..nm, nicknick , Fri, 24 Jul 2009 22:05:20
                  • Re: Nice! Thanks Landjet, i'll check mine tomorrow..nm, Landjet , Sat, 25 Jul 2009 05:16:10
                    • Yes, you are correct.... '88 SPG w/LH.2.2... Shame! I, nicknick , Sat, 25 Jul 2009 09:56:09
                      • Re: Yes, you are correct.... '88 SPG w/LH.2.2... Shame! I, Landjet , Sat, 25 Jul 2009 16:31:41
                        • no, but i would like to! It gets up to 105deg around, nicknick , Sat, 25 Jul 2009 19:37:34
                          • Re: no, but i would like to! It gets up to 105deg around, turbocon86, Sat, 25 Jul 2009 19:48:05
                • Re: fuel cut override or a way to fool the ecu?, Justin VanAbrahams , Fri, 24 Jul 2009 11:07:15
              • Have the same issue! "fixed" it once with new leads,but, nicknick , Fri, 24 Jul 2009 07:15:53
                • Re: Have the same issue! "fixed" it once with new leads,but, Justin VanAbrahams , Sat, 25 Jul 2009 21:39:34
                • Fixed--kind of..., turbocon86, Sat, 25 Jul 2009 09:56:45
                  • Leaning out, less fuel = more knock ->APC to the rescue, Leif Ã…ke, Mon, 27 Jul 2009 20:03:14
                    • Re: Leaning out, less fuel = more knock ->APC to the rescue, turbocon86, Tue, 28 Jul 2009 07:19:33

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