Good post Pat. +1 on the fuel filter, a likely candidate. I would think however, that this truck has TBI injection; thus no fuel rail/schrader valve. So not sure how to test the pressure other than unhook the hardline and connect to a pressure tester. +1 on adding some more gas as well. I've made that mistake before... :(
On Aug 20, 2011, at 11:05 PM, Pat Patterson wrote: > There will be a schrader valve somewhere on the fuel rail. ( like a tire > valve) if you press that you should get fuel under pressure. With experience > you can make a good guess as to how much pressure your getting, but all you > really need to know at this point is that your getting fuel. Try and start > the truck, but don't let it actually crank more than once or twice. then > press the valve, you should have 40ish psi so keep your eyes out of the way. > If you get nothing your pump isn't working... diagnose that as needed. It > needs to be in a bath of fuel, it needs electricity, and ground, and last it > needs to be able to spin. Clogged lines etc are very unlikely. > > Start by confirming the fuel level in the tank. Do NOT depend on the gauge. > Knocking on tank or adding $5 your call. > Just re-read your post... is there old gas, + a little new gas + seafoam in > the tank? If there is only a single gallon of new gas in an S10 and no old > gas, your out of gas, if there is lots of old gas it could be rusted / > varnished tight. > > > Put a test light on the leads to the pump, have someone watch the light while > you turn the key from off to run, wait for a count of 15, you should get > power during this, then try and crank. If you get no light during this test > check the obvious ie mouse eaten wires etc. After that you need a Chevy guy I > have no idea what or how chevy supplies power to their pumps. If you get > light but no gas, check the ground. clip your test light to batt pos, then > probe the ground wire and go through the key procedure again (some > manufacturers switch the ground) If you don't get ground same thing look for > the obvious then find a chevy guy. > > If you have power AND ground... nothing good to say here. You're going to > have to drop the tank and get the pump in your hands. > > If you get to that point shoot me another e-mail and I'll give you more > advice. Most of which you're not going to like much lol. > > More re-reading... Your filter is easy, It'll have flange nuts at each end, > use 2 wrenches and undo them, remove filter, blow through filter... You love > your truck right ;o) it should have no more restriction than a McDonalds > straw. If it's clogged you can use it as a tester by drilling or punching a > hole though the filter media and reinstalling. I have a straight piece of > tube with fittings for my fords just for this. Don't run it this way for > longer than a few min. If it's that clogged it was for a reason. Expect to go > through 2 this year if that turns out to be the problem. After that you > should be good. > > At 06:22 PM 8/20/2011, you wrote: >> You could check all the fuses. One may have decided to go. You could pick up >> a fuel pressure tester online for about $30 and it'll tell you what kind of >> pressure it's generating. If it had a mechanical fuel pump (which it >> doesn't) the lines might just be dried up, and the pump lost it's prime. No, >> maybe that's a stupid idea... >> >> Can you hear the pump come on when you turn the key? It's a very faint high >> pitched hissing sort of sound. If not, you could try to check for voltage at >> the sending unit (pump). >> >> On Aug 20, 2011, at 6:00 PM, NghthwkLvr (NL) wrote: >> >> > Thanks Allen... >> > >> > Before I disconnect the inlet/outlet lines again, I was wondering if >> > there was another way to check for fuel flow. As for the fuel pump, I >> > think i had just had it replaced before I stopped running it. I have >> > noticed that there is very little to no smell of gas. Also, what about >> > a thorough cleaning of the fuel injectors? >> > >> > On Aug 20, 2:02 pm, "Allen Thomas" <[email protected]> wrote: >> >> Could be the fuel pump, clogged pickup, rusted through lines, etc. >> >> Disconnect from the TB and ensure you have flow to it. If not then work >> >> your way back to the tank. Otherwise clean the TB again. >> >> Sent via BlackBerry by AT&T >> >> >> >> >> >> >> >> -----Original Message----- >> >> From: "NghthwkLvr (NL)" <[email protected]> >> >> >> >> Sender: [email protected] >> >> Date: Sat, 20 Aug 2011 11:14:40 >> >> To: Nighthawk Motorcycle Lovers!<[email protected]> >> >> Reply-To: [email protected] >> >> Subject: [Nighthawk Lovers] OT - 91 GMC Sonoma PU won't stay on... >> >> >> >> Hey Guys! >> >> >> >> Haven't posted here in a while but I am always lurking around in the >> >> shadows, love this group and the interesting discussions. >> >> >> >> Let me apologize beforehand for this OT post...but... >> >> >> >> I have a 91 GMC Sonoma PU that I want to get running and cleaned up to >> >> give my son for his 18th birthday and senior year. It has been >> >> sitting around doing nothing since 2007 when I got my new to me PU. In >> >> Sept 08, I started it, drove it down the street, and filled up the >> >> tank. Then I parked it, and haven't moved it since. Well, earlier this >> >> summer, I started tinkering around with it to get it running >> >> again...bought a new battery and all, but it hasn't started. So I >> >> proceeded to clean out the gas lines and TBI/Fuel injector assembly. I >> >> put about a gallon of new gas into the tank and a couple of ounces >> >> into the TB....and now here is my problem: it only starts and stays on >> >> until the fuel in the TB runs out...I even put a little SeaFoam into >> >> the TB and it does the same thing. >> >> >> >> I'm thinking, I need to change the fuel filter, which is under the bed >> >> on the drivers side, BUT, was wondering if maybe there is something >> >> else I should try before I go through all that trouble. (Changing the >> >> fuel filter was one of those things that I'd just rather pay to have >> >> done than do it myself). >> >> >> >> Anyway, I have the Chilton Manual for this truck that I'm going to go >> >> review after I post this, but I just wanted to see if anyone here had >> >> any suggestions. >> >> >> >> Thanks for any suggestions and again, I apologize for the OT post. >> >> >> >> -NghthwkLvr- >> >> >> >> -- >> >> You received this message because you are subscribed to the Google Groups >> >> "Nighthawk Motorcycle Lovers!" group. >> >> To post to this group, send email to [email protected]. >> >> To unsubscribe from this group, send email to >> >> [email protected]. >> >> For more options, visit this group >> >> athttp://groups.google.com/group/nighthawk_lovers?hl=en.- Hide quoted >> >> text - >> >> >> >> - Show quoted text - >> > >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Nighthawk Motorcycle Lovers!" group. >> > To post to this group, send email to [email protected]. >> > To unsubscribe from this group, send email to >> > [email protected]. >> > For more options, visit this group at >> > http://groups.google.com/group/nighthawk_lovers?hl=en. >> > >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Nighthawk Motorcycle Lovers!" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. > > Pat Patterson > Abbotsford, BC, Canada > > > 2001 PT Cruiser > 83 450 Honda Nighthawk > 78 F350 460/C6 on propane > 71 Bronco 302/C4/D20 D44/9" > > > Some people try to turn back their odometers. Not me, I want people to know > "why" I look this way. I've traveled a long way and some of the roads > weren't paved. > > "If you can't take the heat, don't tickle the dragon." > > > > > > > > > > > > > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
