kuwaitliberation Posted April 11, 2007 Report Share Posted April 11, 2007 Don't know if anyone has touched on this topic yet, but I was just doing a general search and ran across this: The following is an excerpt from http://www.findarticles.com/p/articles/mi_qa3828/is_199902/ai_n8837187 A 1991-93 Chevrolet Lumina, Oldsmobile Cutlass Supreme or Pontiac Grand Prix with the 3.4-liter Twin D O H C V6 (VIN X) may show up in your shop with the owner complaining of phantom stalls during parking lot maneuvers when the throttle is closed and there are high loads on the engine from the power steering system and possibly the a/c. Problem for you is, the engine always restarts immediately, so how can you duplicate the conditions? You can't. But if there doesn't seem to be anything else wrong with the car, know that GM has come up with new fuel injectors (Part No. 25170699) that flow richer at lower pulse widths to solve this problem. Before installing the six new injectors, though, go over the minimum air rate setting, the crankshaft end play (on manual transmission models) and the power steering pressure switch with a fine-tooth comb. Also, make sure the PCM has the latest calibration software installed. That should do it for the '91s to '93s. But for the same cars in 1996, it's a slightly different story. The symptoms are the same, with the addition of extended crank times on restarts after a hot soak. For this condition, GM has issued a new PCM calibration that must get "flashed" into the PROM. The part number is 16246074 for the national version and 16246064 for the unleaded export version without QBD II. Plus, you're supposed to secure the vacuum lines at the throtde bore with a nylon tie. Then, if the car still cranks for more than 4 seconds after soaking for at least 45 minutes, swap in six new fuel injectors (Part No. 17113317). Quote Link to comment Share on other sites More sharing options...
RJansen658 Posted April 11, 2007 Report Share Posted April 11, 2007 Well, the extended crank times after a hot soak sounds like every LQ1 I've ever driven. I do think that injectors that flow better at low pulse widths sounds good for the LQ1 guys regardless, even just as an upgrade. But depending on how old that article was, those "updated" injectors may be the standard replacement by now. GM revises their part numbers so often, they always phase out obsolete parts. Quote Link to comment Share on other sites More sharing options...
kuwaitliberation Posted April 11, 2007 Author Report Share Posted April 11, 2007 But depending on how old that article was, those "updated" injectors may be the standard replacement by now. February 1999. Quote Link to comment Share on other sites More sharing options...
White93z34 Posted April 11, 2007 Report Share Posted April 11, 2007 yea my car has that, been 3 years now and does it every 6 months or so, i'm not worried. Quote Link to comment Share on other sites More sharing options...
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