A couple of weeks ago, I posted a question about my 2000 GMC Sierra pickup
truck. It would start easily when it was cold, but then I was having
problems starting it once it was warmed up.
I received lots of ideas from this group, which I thank everyone for. Today,
my mechanic (at my suggestion) started checking the fuel pressure, and then,
at my suggestion from 'Hairy' in this group, he checked the fuel pressure
regulator valve. Yup, it was bad. He pulled the vaccuum hose and fuel came
spilling out. He did say I would have to buy one at the local dealer because
the local auto parts stores don't carry this item. I called the local dealer
and they said it cost US $75. To me, that's a bargain. My mechanic didn't
even charge me for the extra labor because I was in there for an oil change
and it only took him a minute to find the problem. According to him, it is a
piece of cake to replace it. I had a good day today :-)))
Thanks H !!
Thanks for the update. I'm glad you found your problem. I couldn't tell from
your post whether you had replaced the regulator yet, or not. If not, don't
wait any longer than you have to as the raw fuel is washing the oil off of
your cylinder walls and destroying the cats. In this case, procrastination
is not a virtue;-)
Called the dealer this AM, they have to order the part and it will be in by
Friday. I will have it replaced within the week. Thanks for the heads up.
What are the cats?
Some likely did make it to the crankcase but most would have gone out the
exhaust. We're not talking large quantities of fuel, but enough to flood the
cyls, hence the difficulty starting.
Ok and hence, the fuel smell. Well, I went to another dealer today because
they said they had one, but, of course, there's 2 different ones. One has
the vaccuum hose connected to the 'side' of the regulator, and one has the
hose connected to the 'top' of the regulator. So since my regulator's hose
connection points up toward the engine, instead of toward the fender, I
thought the one I needed was Part number 1170-3700(top), but, when I looked
in the pkg, I noticed that it was the wrong one. I need part number
1170-3786(side) IIRC. Anyway, they will have one tomorrow so I can pick it
up and have it replaced then. A hundred bucks instead of $75.
Can I expect to have to replace anything else because this problem has gone
on for at least a month now? Like cylinders, pistons, rings, cats, stuff
like that? My driving is mostly city type, low speed (under 50mph), only
occasionally using the highways.
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