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    VWVortex


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    Thread: engine starving for fuel at high RPM

    1. Junior Member roscoe crawford's Avatar
      Join Date
      May 8th, 2011
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      nampa, idaho. usa
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      1989 cabby,1993 passat,2004 MKIV jetta
      03-21-2012 08:03 PM #1
      i have a 89 cabby 1.8 cis only mods is on throttle body from digi II and a cold air intake. when car is cool runs awesome when warm and accerlerate to 5000 rpm car will stutter and then catch up. fuel pump humms intermittingly new pre-pump. all injecters are new, motor has 1200 miles on her, its driving me crazy. any help would be awesome. thanks
      vwslamman

    2. Junior Member
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      Feb 5th, 2012
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      Snohomish, WA
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      88 Mk2 GTI
      04-17-2012 12:24 AM #2
      Get a fuel enrichment box worked great for me techtonics or autotech 8 different settings

    3. Member
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      Aug 14th, 2005
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      Germany
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      04-17-2012 01:56 PM #3
      Quote Originally Posted by roscoe crawford View Post
      i have a 89 cabby 1.8 cis only mods is on throttle body from digi II and a cold air intake. when car is cool runs awesome when warm and accerlerate to 5000 rpm car will stutter and then catch up. fuel pump humms intermittingly new pre-pump.
      Hope the switches on the throttle body were transfered over somehow. 89 should already have had the larger throttle body, no? Any how, you could be looking at a few things. Main pump going bad, fuel filter getting clogged, control pressure regulator going bad or even ignition problems but it would be just guessing at this point. With CIS the first thing one should do is a complete fuel pressure test as the system relies about 100% on the fuel pressure to function correctly.

      Quote Originally Posted by TCW View Post
      Get a fuel enrichment box worked great for me techtonics or autotech 8 different settings
      That device is for CIS-e and not CIS with Lambda control.

    4. Member
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      92 Jetta GLI 1.6TD Ripper (VNT20 Turbo), 86 GTI (Wolfsburg Golf), 86 Audi Coupe GT
      04-18-2012 04:21 PM #4
      i would check that the fuel filter is not clogged before i go any further..

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