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Thread: 90 Grand Wagoneer - chasing cold start hesitation/rough idle

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  1. #19
    Electronic Ignition!
    Join Date
    Jul 2020
    Posts
    15
    Update: back from the shop & the smoke test: Was kinda hoping I had a vacuum/exhaust leak that would explain this, but as it turns out, I had found/fixed them all - passed the smoke test with flying colors. So, we appear solid on electrical, grounds, vacuum, and exhaust. Am wondering now, whether there’s a mismatch with the .bin & reality? Babywag at fsjnetwork recommenced having injectors pulled & cleaned/flowbenched, and EagleMark on the forum here, recommended MrInjector. I’ve not been able to find anyone locally that does this.

    Am thinking next steps are: pull injectors & send off for cleaning, and pull the .bin for comparison, and see where we are.

    Would converting to an adjustable fuel pressure regulator help here? Am running 12 lbs, where acceptable range is 9-13...

    Any other ideas before we head down this path?
    Last edited by Theodore; 08-20-2020 at 02:22 PM.

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