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  #1  
Old 10-15-2011, 07:55 PM
petflunky petflunky is offline
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Default Hardm to start truck

Hi
I have a 1994 2500 4x2 that recently has been very difficult to start. I originally thought I had the problem fixed by reseating the wire from the coil to the distributor. It started and ran fine for about a week, but now it's acting up again.
Here's the symptoms. It cranks and cranks and cranks, won't start. However, eventually, there is a buzzing from under the hood. It is either the fuel pump relay, or the auto shutdown relay. Once it quits buzzing, the truck starts right up, and the truck seems to be running ok. Any thoughts on what's causing the problem? Should replace the relays?

Oh, as for codes, after I drove to my dad's house, I had to take him out and show him the relays, and we took the relays out and reseated them. When I got home, I decided to check for codes. It flashed 1-2. If I'm ready my haynes book correctly it means there is a problem with battery connection. Direct battery in put to pcm diconnected within the last 50 ignition key on cycles. I'm not sure if this is related to me taking out and putting the relays back in.

Thanks!
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Old 10-15-2011, 10:28 PM
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ramfam ramfam is offline
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12 is always first code.swap relay's with another.
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Old 10-15-2011, 10:33 PM
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The two codes that should show on old computers is 12,55 it's not computer related.
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Old 10-16-2011, 11:10 AM
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also check the power comeing into both relays make sure its at least 12 volts. I had a 94 safari that did most of the same things. it turned out to be a bad fuseable link that had one whole side of the fuse panel messed up.
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Old 10-16-2011, 11:48 AM
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Ok, I will try switching the relays around when it quits raining. Thanks for the input.
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Old 10-16-2011, 12:40 PM
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Hi
I swapped the relays around, and it made no difference. I guess I will take the truck over to my dad's this week to check the voltage (I don't get along with electricity too well). As for fusable links, those are those fuses next to the relays, right? If so, they all look ok.
Thanks,
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Old 10-16-2011, 11:39 PM
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I think I would let it do its buzz thing a few times and try and feel the ground for the relay panel and see if it is getting warm or better yet, hot. Sounds to me like a ground problem. That being said, I don't know where the underhood fuse/relay panel is grounded. With a meter set to ohms, pull a relay and ground one probe to neg, and probe the slots from where you pulled the relay til you get continuity. then you'll need to see where that particular wire (on the bottom) connects on the frame, fender, block, whatever. If you've swapped relays around already, and you can feel the buzz in one of them, when they're buzzing, this troubleshoting should lead you to the bad actor ground. One other thing, if you fire some ether down its throat just before you try to crank, does it fire immediately? How about when you're going down the road, and you mash the motor, does it make good solid power, or does it feel weak?? The other thing you may have going on is a fuel pump on its way out. The ONLY way to know this is to gauge your fuel pressure, it should be solid as granite under all road conditions. There is no fuel filter on your truck unless someone put their own on, so you can discount changing the fuel filter. Fuel filters (read pumps) are expensive, but they sure can cause a ton of grief via a multitude of symptoms of impending failure, because the ECU tries like crazy to compensate for variations in pressure Good Luck, please communicate your fix, it helps a lot of other people on the forum!!!!
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Old 10-17-2011, 01:24 AM
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a fuseable link often is attached to the positive battery cable
you have the primary wire & a secondary wire coming off the battery connector
i have never heard of one going bad, usually it is a bad connection between the connector & the battery post
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Old 10-17-2011, 10:03 AM
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Hi
Thanks for the input. I have done some research online, and everything I found points to a bad wire somewheres. So, it looks like I'm going to get out my little meter thingie and start checking wires and the stuff (with my dads help. I'm not too good with electrical stuff). As for how the truck runs, for a while it was lugging and missing. I put new plugs in (the truck does need a tune up) and it seems to run fine now.

I forgot to mention, the one time I was having problems with it, my neighbor was out, and said he was smelling gas. So I'm thinking what happens some of the time is it's not starting, but it's getting gas.

So, now I have a couple of projects for the week. I guess I better get started.

Thanks for the help!
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Old 10-23-2011, 03:59 PM
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Okay, my dad and I checked the voltage on the relays. They are all getting 12 volts. He's convinced that the relay is bad. So, I'm going to keep an eye on it, and I told him if it acts up again, he's getting a phone call, lol! I also cleaned all the ground wires that I can find. So, I'm going drive the truck for a few days and see what happens.

As for checking the fuel pressure, I don't have a fuel gauge. If I continue having problems, I'm gonna buy one and Check the pressure.
Oh, and I'm still not getting any codes. If it acts up again, I'll check for codes again.
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