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Join Date: Dec 2006
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Hi-Torque Starter will solve this issue

Bosch starters are CRAP !!!


Old 06-01-2010, 01:00 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
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Originally Posted by Hirevtuner View Post
Well maybe not zero. I removed the gauge at 1 bar but it did drop fast.
Do you think the fuel head would be the offender? It runs great once started.
I don't know why your pressure would change so drastically due to heat, but who knows? It can't hurt to pull the regulator out of the fuel distributor. If it's all gummed up, it might be an indicator of the general condtion inside the fuel head.

I'm still not clear if you're referring to the system pressure or to the warm control pressure (the control pressure being established by the WUR). If you're talking warm control pressure dropping off to less than 1 bar, I would think your WUR is at fault (I know you've replaced it, so...?).

Somewhere you have fuel pressure bleeding off. I would point you to the ball check valve at the front pump, but you've already replaced it as well.

Currently stumped....
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Old 06-01-2010, 08:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
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Well I still say it is most likely a bad injector seating issue.

So what you have is fuel pressure leaking off from the system when turned off hot, while at the same time causing a flooded engine condition.

If you let it sit for a short time 5-10 minutes, it has not leaked off enough fuel yet to cause flooding & you still have some pressure, so it starts.

You let it sit for say 20-30 minutes, & enough fuel has leaked that you have zero pressure + a flooded engine, so you crank & crank till it's clear & you have fuel pressure, then it starts.

This does not show up as a symtom when cold either, because the leaked fuel has evaporated & the cold start valve blasts enough fuel in the get it fired up while the pumps come up to pressure.

my .02 cents worth

Mark

Last edited by full quack; 06-01-2010 at 11:38 AM..
Old 06-01-2010, 11:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
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Had the same problem, finaly decided to just replace all six injectors (minor cost realy)
Old 06-01-2010, 07:29 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #24 (permalink)
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Thanks guys. I'm thinking I do have a bad injector that is bleeding down at rest but under running pressure is not causing me grief. I will get another set and give them a try.
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Old 06-02-2010, 03:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #25 (permalink)
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Poor mans way out...Try some mmo-in the fuel...

worth a shot, and not costly.

Walt
Old 06-02-2010, 05:25 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #26 (permalink)
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