165 Startup learning?

[Romans, Mark]

Sounds like you may have a vacuum leak or the calibration may be off for
your maf sensor.
Mark
----- Original Message -----
From: "Marteney, Steven J." <smarteney at xlvision.com>
To: <gmecm at diy-efi.org>
Sent: Monday, June 19, 2000 7:55 AM
Subject: 165 Startup learning?


> Okay, it was an accident, but I changed more than one thing at a time.
This
> weekend I both re-set the fuel pressure (it had decayed to 30psi from
> 46psi... stupid $%^@&# AFPR) AND unplugged the computer doing something
> else.  I thought it was the fact that the computer was unplugged, but now
> I'm not sure.  Anyway, the cold-start problem is back.  While typing this,
I
> realized that I have unplugged the computer before this when I pulled and
> read the PROM over a month ago and it didn't re-introduce the cold-start
> problem.  Here's the (brief) story.
>
> Car is hard to start, cranks and cranks finally stumbles to a start.
Idles
> crappy.  Tap the gas and it revs up good, try to hold idle still at 2k
wants
> to die.  Pump gas again, revs up, hold it, wants to die.  Sounds to me it
> wants more fuel and the tap of the gas is like an accel. pump but doesn't
> get enough to maintain idle.  So I'm sitting there pumping the gas trying
to
> keep it running while fumbling to get Diacom started.  Suddenly, idle
jumps
> up to 1k or so and it will idle on its own!!!   CLosed loop mode enable?
> Finally get Diacom plugged in and it shows closed loop mode with the BLM
at
> 160 and the BLI at 140+.  It wants a lot of fuel apparently.
>
> Sorry for the length, but I wanted to continue a bit from earlier.  Don't
> know if this is true, but it seems suspicious that increasing the fuel
> pressure would cause the car to go lean and want more fuel, unless the reg
> is bad.  After the key is shut-off the pressure drops instantly by about
> 5-10psi and then decays very slowly to zero after a couple hours.  When
> running, if the throttle is cracked the gauge goes wild but will stabilize
> at slightly higher pressure with the slightly wider throttle opening.
> Sorry, I'm talking to hear myself talk.  I'll stop.
>
> Steve (patiently waiting for tuning s/w)
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