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Subject:Re: Cold Engine Problem
From:Mark Dorm
Date:Thu, 4 Jan 2001 13:42:53 -0800
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<P>My engine is stalling on start up when cold in 35 degrees F weather. I start it, have to keep the gas on it, give it 30 seconds or more, then drive down the block, stop at a stop sign, and it stalls and I have to restart it and keep the gas on it. PITA. <BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV>&gt;From: Mark Keller <KELPHOTO@ISLANDNET.COM>
<DIV></DIV>&gt;Reply-To: Mark Keller <KELPHOTO@ISLANDNET.COM>
<DIV></DIV>&gt;To: vanagon@GERRY.VANAGON.COM
<DIV></DIV>&gt;Subject: Cold Engine Problem
<DIV></DIV>&gt;Date: Tue, 2 Jan 2001 23:39:45 +0000
<DIV></DIV>&gt;
<DIV></DIV>&gt;Hi Dave,
<DIV></DIV>&gt;
<DIV></DIV>&gt;You said the engine essentially has a delay in throttle response when
<DIV></DIV>&gt;cold; and the last cold engine experience was not a delay but rather a
<DIV></DIV>&gt;stalled engine.
<DIV></DIV>&gt;
<DIV></DIV>&gt;I would check the fuel pressure 29 psi at Idle 36 Psi at low vacuum. On
<DIV></DIV>&gt;a cold engine the computer assumes the fuel pressure is set and gets no
<DIV></DIV>&gt;feedback if the mixture is too lean or to rich. If the fuel pressure is
<DIV></DIV>&gt;low then the engine runs lean and would stay that way until the engine
<DIV></DIV>&gt;warmed up, and then the O2 sensor would cause the injector pulse to be
<DIV></DIV>&gt;lengthen until the mixture was correct.
<DIV></DIV>&gt;
<DIV></DIV>&gt;
<DIV></DIV>&gt;Sincerely,
<DIV></DIV>&gt;
<DIV></DIV>&gt;Mark Keller
<DIV></DIV>&gt;91 Carat
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