Subject	Trouble starting when hot and lean for 1min. PRVR deleted.
Posted by	treese88 on May 21, 2012 at 6:15 PM
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Message	Not a huge issue, but an annoying one I'd like to get to the bottom of. The Z has always had a weaker start when hot than cold but usually still fires on the first turn. Cold it starts perfectly. -Failed to start on first key turn when hot today (had sat for 1.5 hours). Second turn it took a little gas to get going and was still a bit weak. -When I start the car hot it runs lean for the first minute or so, idle or driving. Wideband goes from a normal ~14 to 16 a/f. It has always done this, I switched from DW injectors to Nismo, problem stayed. -Fuel pressure is good, I have a fuel pressure gauge, and I tested it to make sure it isn't faulty. Minimal to no vacuum leaks (tested many times), proper timing. Issue seems unrelated to the tune and injectors as I have switched multiple times and this has always stayed with varying effect. Also PRVR is deleted which is the common cause of these issues. Thanks for any advice on what to check. '91 TT
Follow Ups	Trouble starting when hot and lean for 1min. PRVR deleted. - treese88 18:15:24 05/21/12 Re: Trouble starting when hot and lean for 1min. PRVR deleted. - MaxxAction 22:57:30 05/21/12 Re: Re: Trouble starting when hot and lean for 1min. PRVR deleted. - sandmanz32 23:37:37 05/21/12 First tune was an ash chip. Next I switched to Nistune - treese88 08:17:47 05/22/12 Check for fuel in the vacuum lines off the fpr, and damper (n/m) - sandmanz32 18:06:23 05/22/12 Always get that recommendation :) been checked and - treese88 18:11:49 05/22/12 Have you done a pressure leak down test of the rails? (n/m) - sandmanz32 19:27:15 05/23/12 Loses pressure but not at rails. Not a leaky injector. - treese88 22:20:09 05/23/12 Re: Loses pressure but not at rails. Not a leaky injector. - sandmanz32 22:38:22 05/23/12
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