SicShelby Posted January 26, 2009 Report Share Posted January 26, 2009 So threw the new starter in and it cranks, but won't start. Can get it to run for a few seconds feeding starter fluid in the intake, but won't run without it. The truck was sitting for about a week or so until we got the new starter in it. Rob - thought I'd add that this a red truck. Any ideas? Quote Link to comment Share on other sites More sharing options...
kenny Posted January 26, 2009 Report Share Posted January 26, 2009 What motor? 4.3s require quite a bit of fuel pressure to start. If it runs when you're spraying starter fluid, but not without, it's pretty obviously a fuel issue. What is the fuel pressure at the rail? Can you hear the pump prime? When was the last time you changed the fuel filter? Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 26, 2009 Author Report Share Posted January 26, 2009 What motor? 4.3s require quite a bit of fuel pressure to start. If it runs when you're spraying starter fluid, but not without, it's pretty obviously a fuel issue. What is the fuel pressure at the rail? Can you hear the pump prime? When was the last time you changed the fuel filter? It's a 2.2L. Fuel issue definitely. This truck belongs to a friend - he says he can hear the fuel pump. The tank was almost empty when we changed out the starter and he had some gas in a fuel can that he threw in there after. I want to say that there's some condensation in the fuel and he added some dry gas, but it didn't help. I want to say the fuel filter is the next step, and move on from there. I won't be able to get under it until Tuesday or so but I want a game plan before I start. Don't know when the fuel filter was last replaced; haven't checked the pressure yet. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted January 26, 2009 Report Share Posted January 26, 2009 the fuel lines could be froze up if it was run real low on gas can you get it inside somewhere warm? Quote Link to comment Share on other sites More sharing options...
kenny Posted January 26, 2009 Report Share Posted January 26, 2009 If it's almost empty just siphon it, doesn't hurt to try it maybe he'll luck out and it's bad gas. I doubt it, but it's basically free to do. Sounds like you know where to look... get to it. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 26, 2009 Author Report Share Posted January 26, 2009 the fuel lines could be froze up if it was run real low on gas can you get it inside somewhere warm? I kind of thought that too... he tried to get it running last Friday when it was warm out but it didn't make a difference. I was hoping it would have been warm enough to thaw the lines. Still a chance though... he's going to get it in a garage this week. If it's almost empty just siphon it, doesn't hurt to try it maybe he'll luck out and it's bad gas. I doubt it, but it's basically free to do. Sounds like you know where to look... get to it. Okay... I'll see about getting that gas out of there. I think it's a slim chance too considering that he put the gas dry in there, but like you said, if it's almost empty might as well... and start cheap and move on to the more expensive replacements. I'll keep you all posted... here's some other ponders - I know on Ford's they have the fuel shut-off's. Do GM vehicles have this? Past that I think there's a fuse for the fuel pump, I'll check that. Next to that I want to replace the fuel filter and if any of this doesn't work... start checking the fuel pump I guess?? Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted January 26, 2009 Report Share Posted January 26, 2009 check the fuel pressure first and go from there Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 26, 2009 Report Share Posted January 26, 2009 check the fuel pressure first and go from there ditto Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 27, 2009 Author Report Share Posted January 27, 2009 Couple of things are eating at me - how could the truck go from running (while the starter was wearing out), to cranking and not running after a new starter was put in? That doesn't make sense. I can understand a clogged filter, but if that was the case the truck would be stuttering (and wanting to catch), and if the fuel pump was going bad it would again, run rough. The truck is cranking but just not catching - at all. So there has to be some kind of fuse or relay, or something, that interrupted this process all of the sudden, know what I mean? Honestly, does that make sense?? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 27, 2009 Report Share Posted January 27, 2009 is the check engine light on? are you getting spark? make sure you didnt leave a fuse link off the starter itself. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 27, 2009 Author Report Share Posted January 27, 2009 Yah getting spark. It will actually run for a few seconds after you feed starter fluid through the intake. Everything is connected good on the starter, for sure... if I missed something there it wouldn't even be turning over. So, I'm past the starter - it turns over... now I have to figure out why it cranks but doesn't run. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted January 27, 2009 Report Share Posted January 27, 2009 check. the. fuel. pressure. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 27, 2009 Author Report Share Posted January 27, 2009 Alright alright fuel pressure. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 27, 2009 Report Share Posted January 27, 2009 check. the. fuel. pressure. yeah for what the 5th time now. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 28, 2009 Author Report Share Posted January 28, 2009 Okay got the fuel pressure tester/gauge before the fuel filter, after the fuel pump. There's nothing, not even an inkling. Before I drop the fuel tank, do you know how to test relays, and any idea where exactly they're located? There's a couple of relays in the glove compartment and three mounted on the firewall in the engine bay. Input appreciated. Gabe Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted January 28, 2009 Report Share Posted January 28, 2009 multimeter is your friend for a relay. you should here the relay click when it turns over the switch in there. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 28, 2009 Author Report Share Posted January 28, 2009 multimeter is your friend for a relay. you should here the relay click when it turns over the switch in there. Yesss have the multimeter. There are five points? on the relay where do I/how do I test these? Quote Link to comment Share on other sites More sharing options...
kenny Posted January 28, 2009 Report Share Posted January 28, 2009 Easiest way is to test voltage at the pump. I haven't had to do a fuel pump on mine yet, but they say it's easier to remove the bed than it is to drop the tank. With a 95 the relay should be in the glove box. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 28, 2009 Report Share Posted January 28, 2009 those are bad about melting the connector at the pump aswell. best to test for voltage at the pump to make sure you have power and ground Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 28, 2009 Author Report Share Posted January 28, 2009 Easiest way is to test voltage at the pump. I haven't had to do a fuel pump on mine yet, but they say it's easier to remove the bed than it is to drop the tank. With a 95 the relay should be in the glove box. Haha yeah I can almost see that... I have the straps off right now and am working on the dropping the tank. As far as I can tell the relay is in the glove box too. I'll see if I can't get enough room to drop the tank to get to the connectors. Quote Link to comment Share on other sites More sharing options...
Richard Cranium Posted January 29, 2009 Report Share Posted January 29, 2009 I've seen a couple S10s that lost fuel pressure when the ground wire for the fuel pump rusted off or broke. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 29, 2009 Author Report Share Posted January 29, 2009 I see... looks like the ground wire is doing well. I just got the tank down far enough to start looking at stuff... taking a dinner break and then I'll be back. I'm going to definitely check the wires. Taking the tank down without removing the bed is doing well :-) Gabe Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted January 29, 2009 Report Share Posted January 29, 2009 dont bench test the pump if it gets to that. DONT DO IT we also lifted the bed up and put 2x4 underneath makes it a lot easier than haveing to take the whole bed off. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted January 29, 2009 Author Report Share Posted January 29, 2009 (edited) Well... we managed to get the fuel tank out actually really easily. So, it's out. Next step? We hooked up the multimeter to the connection leading to the fuel pump, it read about 8.3 volts or so. dont bench test the pump if it gets to that. DONT DO IT Okay, don't bench test the pump, meaning don't connect a positive lead right? Got it. Now... I need to trace down the fuel relay. One manual says it's on the firewall on the passenger side... another one says it's in the glove compartment. Where is this thing? Edited January 29, 2009 by SicShelby Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted January 29, 2009 Report Share Posted January 29, 2009 its in the golvebox behind a little plastic cover if you have key on power at the pump and your sure it not out of gas replace the pump get a delphi or a delco it will come with a new harness make sure you install it Quote Link to comment Share on other sites More sharing options...
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