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#1
04-28-2006, 03:15 PM
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W126 warm-up phase
Throttle response is great when the engine is completely cold, or fully warmed up. But theres a brief period of several minutes in between when there is a noticable hesitation off idle.
I'm guessing this is the warmup regulator going lean too quickly. System and control pressures are good, though I had to knock the pin down a little to get the cold control pressure where its supposed to be. Where else should I be looking, or should I just leave well enough alone?
__________________
1985 380SE Blue/Blue - 230,000 miles 2012 Subaru Forester 5-speed 2005 Toyota Sienna 2004 Chrysler Sebring convertible 1999 Toyota Tacoma 
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#2
04-29-2006, 08:08 PM
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Quote:
looks like you answered yer own question. most likelly the warm up regulator. shouldn't need to "adjust" it. this is a sign that its bad. just make sure that yer fuel pressure and flow is good. george
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#3
04-30-2006, 11:21 AM
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Would increasing the system pressure change anything, as long as its still within specs?
__________________
1985 380SE Blue/Blue - 230,000 miles 2012 Subaru Forester 5-speed 2005 Toyota Sienna 2004 Chrysler Sebring convertible 1999 Toyota Tacoma
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#5
04-30-2006, 06:37 PM
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O2 is fine (new). The problem is during the period before closed loop. What other inputs control the warmup regulator, or is it completely stand-alone? I'd rather chase down a bad sensor than replace the WU regulator, which I understand is expensive.
__________________
1985 380SE Blue/Blue - 230,000 miles 2012 Subaru Forester 5-speed 2005 Toyota Sienna 2004 Chrysler Sebring convertible 1999 Toyota Tacoma
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#7
05-02-2006, 11:28 PM
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Quote:
if yer fuel pressures are fine then i think yer stuck with the warm up regulator. you do have other options like eng vac leaks that need to be found with a smoke machine. best, george
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