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1990 c1500 with possible fuel issue
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nickwarner
Veteran
/ Moderator
Jan 11, 2013, 4:17 AM
Post #26 of 42
(1566 views)
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Re: 1990 c1500 with possible fuel issue
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Congrats on finding it and thanks for posting the fix.
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zboy56
User
Jan 14, 2013, 3:20 PM
Post #27 of 42
(1552 views)
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Re: 1990 c1500 with possible fuel issue
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well the problem came back again earlier today but the truck didn't die like would before and after about 30 seconds started acting normal again, so anything else that could make a vehicle act up like this and there isn't any vaccumm leaks i checked everyone of the hoses.
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Sidom
Veteran
/ Moderator
Jan 14, 2013, 7:23 PM
Post #28 of 42
(1542 views)
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Re: 1990 c1500 with possible fuel issue
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What brand of plugs did you put in it?
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zboy56
User
Jan 14, 2013, 9:29 PM
Post #29 of 42
(1532 views)
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Re: 1990 c1500 with possible fuel issue
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NGK and i've noticed that some reason the coolant reservoir doesn't seem to keep any coolant in it but when i check the radiator it's full but there aren't any leaks anywhere under the truck when i park it or in the engine compartment.
(This post was edited by zboy56 on Jan 14, 2013, 9:39 PM)
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Sidom
Veteran
/ Moderator
Jan 14, 2013, 9:59 PM
Post #30 of 42
(1528 views)
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Re: 1990 c1500 with possible fuel issue
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Without some data to go on, it makes it real tough to diagnose......There is a lot of things that will cause this problem from quick cheap fixes to every exspensive ones.......
What kind of diag tools do we have at out disposal here? (If you comeback with a paperclip & snickers bar,,,,then we are in trouble here)......Is there anyway you could pull a datastream from the comp (cold & hot)? Do you still have the old plugs? If you do take a high res picture of them, get a good shot of the electrodes....& post them....
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zboy56
User
Jan 14, 2013, 10:18 PM
Post #31 of 42
(1522 views)
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Re: 1990 c1500 with possible fuel issue
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what sort of diagnostic tools do i need for something like this and as for the picture or data stream i can't get those, the only camera i have is little crappy one on my phone
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 15, 2013, 3:16 AM
Post #32 of 42
(1517 views)
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Re: 1990 c1500 with possible fuel issue
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Didn't read this whole thing again. NGK is either good or bad for plugs but better to use OE AC Delco. If you drop a plug in handling mark which one. Plug was already found broken once. Takes tools to put them in with straight on torque or just putting them in will break them. There's a problem with this happening twice and think that's it.
Coolant recovery tank: They get old and crack and may be losing coolant right from it. Temp fix if so is silicone sealer but takes time to cure. Need a new one for the fix as it wont last patched if so,
T
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zboy56
User
Jan 15, 2013, 9:36 AM
Post #33 of 42
(1507 views)
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Re: 1990 c1500 with possible fuel issue
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Tom all the plugs are good. The problem i'm refering to is the i stated earlier involving a rough idle and the vehicle surging sometimes when accelerate.
(This post was edited by zboy56 on Jan 15, 2013, 9:47 AM)
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Sidom
Veteran
/ Moderator
Jan 15, 2013, 8:11 PM
Post #34 of 42
(1491 views)
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Re: 1990 c1500 with possible fuel issue
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I would say at the minimum you need a test light, digital voltmeter, vacuum gauge, compression gauge & paper clip (too pull codes)... It would really help to be able to look at the datastream when it's acting up and when it's running good but if you don't have one then you don't have one.......If you like to do your own work, it really wouldn't be a bad idea to have one......I don't use the lower end stuff a whole lot but have seen some of them giving more data than they use to....Before they were basically a code puller & clearer but some now have datastream options & a few years ago I saw tech pick up a cheap one that even had some OBD I functions (that's what your system is)
Since this problem seems to be temp related, you have to look at the coolant temp sensor....Tom was nice enough to post a chart for you.....Get an ohm meter & check it when it's cold.....If its 30° outside & your sensor is showing 70°....that could be a big problem......Then you could try disconnectronics.....unplug the EGR valve, take if for a spin, unplug the MAP sensor, see what that does.......
If you don't even have the basics.....The all you can do is replace all the overdue maintenance parts and then......guess......That can get real expensive real quick....
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zboy56
User
Jan 15, 2013, 9:00 PM
Post #35 of 42
(1483 views)
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Re: 1990 c1500 with possible fuel issue
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well i have a test light, i believe my uncle has a voltmeter and possible some of the other stuff too, but there isn't any codes that i get from the self diagnostic function but the problem is i never when it will act up again or if it act up long enough to get any readings
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Sidom
Veteran
/ Moderator
Jan 15, 2013, 9:24 PM
Post #36 of 42
(1480 views)
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Re: 1990 c1500 with possible fuel issue
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Yea thats the tough thing about intermittent problems, even with all the bells & whistles they can be tough to track down......Best thing to do is try to nail down a pattern....when you are in the 90% range the problem is going to happen.....This is when you need to be checking things out and see if what you did made a difference.....better or worse...
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zboy56
User
Jan 25, 2013, 5:50 PM
Post #37 of 42
(1448 views)
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Re: 1990 c1500 with possible fuel issue
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well i'm taking my truck into auto repair place tomorrow but today when it was acting up i got two numbers from the self diagnostic thing and they were 15 followed by 13
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 25, 2013, 6:23 PM
Post #38 of 42
(1444 views)
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Re: 1990 c1500 with possible fuel issue
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Those are both important codes
13 - 0/2 sensor open circuit
15 - Coolant temp sensor (low temp indicated}
Both of those things will really mess up your fuel mixture. This could be a wiring issue involving those sensors since the problem is intermittent.
You really need a scan tool to monitor these sensors while wiggling wires.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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zboy56
User
Jan 25, 2013, 9:18 PM
Post #39 of 42
(1438 views)
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Re: 1990 c1500 with possible fuel issue
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ok thanks i'll make sure to tell the guys at the shop when i take it in
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Sidom
Veteran
/ Moderator
Jan 25, 2013, 9:22 PM
Post #40 of 42
(1437 views)
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Re: 1990 c1500 with possible fuel issue
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I agree with Desi.......Those had a problem with connecters going bad on the ECT sensor........Might not be a bad idea to take a look at the sensors & connecters......They sell new connecter ends for the temp sensor....
Let us know what you find out.....
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zboy56
User
Jan 28, 2013, 8:33 PM
Post #41 of 42
(1414 views)
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Re: 1990 c1500 with possible fuel issue
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well guys it turns out the fuel pump was going bad and only putting out half the pressure it should but after the shop replaced it my truck is running great
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nickwarner
Veteran
/ Moderator
Jan 28, 2013, 10:16 PM
Post #42 of 42
(1413 views)
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Re: 1990 c1500 with possible fuel issue
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Glad to hear its running good. Going to lock this thread as fixed but you can unlock it anytime by sending a PM to any of us mods. This is to prevent spammers and people hijacking threads from flooding your inbox.
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