Welcome guest, is this your first visit?
Member
Discoveries
 
Page 1 of 6 123 ... LastLast
Results 1 to 15 of 84
Like Tree118Likes

Thread: Need a Machanics Advice!

« Prev Thread | Next Thread »
  1. #1
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)

    Need a Machanics Advice!

    I am working on a 2000 GMC 1500 pickup, with a5.3 v-8 engine. I was sure that the reason that it just quit was because the fuel pump quit working. The reason was that the gas gauge on the dash would show empty whenever the tank reached half empty. Anyways, I replaced the fuel pump (which entailed lifting and removing the bed) and also replaced the fuel filter. Then I proceeded to start the vehicle, but luck. I borrowed a electronic analyzer from the local parts supplier and it read that my crankshaft position sensor needed replacing. So with much difficulty I changed that sensor, but the vehicle still won't start. I finally checked to see if I was getting any spark, and guess what, I am not getting any spark. So, my question is; what should be looking for to be the problem? I appreciate any suggestions. Thank You.
    Kray Gelder likes this.

  2. #2
    Charter Member
    us
    WolfPack member

    Aug 2009
    New Hampshire
    Garret Master hunter Cx Plus
    12,824
    7943 times
    The Truth
    Does the engine have a seperate coil for each spark plug?
    old digger likes this.

  3. #3
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    I am not sure. Please forgive my ignorance, I'm not savvy with these newer electronics.

  4. #4
    us
    Mar 2010
    Southwest Georgia
    XP Deus, White's DFX
    4,926
    5531 times
    All Types Of Treasure Hunting
    It's possible that you got a bad crank sensor.
    old digger likes this.
    My wife does all the driving, I just hold the steering wheel.

  5. #5
    Charter Member
    us
    Nov 2012
    Maryland
    XP Deus, Tesoro Cibola
    11,893
    19549 times
    All Types Of Treasure Hunting
    Banner Finds (7)
    Possibilities are a bad crankcase sensor, or a bad coil or bad coil pack. Those GM coil packs are not too expensive, but sometimes hard to get to. I had a '96 that would run then stop. The coil pack got hot and would quit on me. Trouble is, knowing which one. What we did was replace one and try it. Then if it didn't work, move to the next. Yours has eight. I think it takes a 10 mm socket to get off. GM loves the 10 mm size. The only three things I could think otherwise would be the main computer, the wiring harness itself or one of those big relays. Go buy an ODB II sensor reader and try it first. It may tell you as it will tell (more than likely) where the trouble lies. Last possible thing is the timing chain. When I lost by beloved '96 Pontiac Transport it just stalled out and would not start. No warning. It had slipped the timing chain and destroyed its engine. There are quite a few possibilities. That's why I now go to a local guy with a BIG computer.

    (Bet you didn't know the ol' cat knew cars!)

  6. #6
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    Quote Originally Posted by fyrffytr1 View Post
    It's possible that you got a bad crank sensor.
    I replaced it.

  7. #7
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    I did a little looking on youtube and I believe I need to do a little more testing. First I'll check the or those coils, and then If I'm not getting a proper spark, then I need to check the EMC1 fuse. And if that is not functioning right, then it is most likely the ignition switch. I think this is the route I should take. Wish me luck!
    RustyGold likes this.

  8. #8
    us
    WP

    Mar 2014
    Dallas,GA
    CZ6A
    4,684
    6046 times
    All Types Of Treasure Hunting
    All I know for sure? Is that you do not want shocked by that coil pack!!! I'm no help with any of the rest. I usually just have to try to search out the problem on my own. Past experience...Check the signal going to coil pack/s (if you can), check ignition switch(some vehicles are known for this issue, I'm not sure about GMC), You can also check your sensors, there are pages online that explain how and what readings they should give. And last maybe a bad computer,connector/s, wire etc.... But all of this is hard to guess at or to tell someone how to do(for me). I just dive in and start guessing and tracing things out randomly until I find the problem. I know the instrument clusters are also a problem in some of those year trucks, I've rebuilt those before, the little motors go bad. Cheap fix if your good with a soldering iron, but I've never heard of one causing a no start. The Ignition switch thing threw me one time. I worked on the truck, did everything I knew and couldn't figure it out. It cranked, turned on, but for some reason the switch wasn't allowing spark. That is probably a rare case, but something to check too. I forget what truck that was.

    Ohhh! Another thought...Not sure if this is any help or not, but we have had anti-theft or alarm systems go haywire and not allow spark. But my memory sucks and couldn't tell you what vehicles those were.
    Last edited by Nitric; Jan 12, 2019 at 09:10 PM.
    old digger likes this.

  9. #9
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    Quote Originally Posted by Red James Cash View Post
    Does the engine have a separate coil for each spark plug?
    Yes, you are right it does. Thank You!

  10. #10
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    I hope it's not the ignition switch.
    Nitric likes this.

  11. #11
    us
    WP

    Mar 2014
    Dallas,GA
    CZ6A
    4,684
    6046 times
    All Types Of Treasure Hunting
    Quote Originally Posted by old digger View Post
    I hope it's not the ignition switch.
    I would have never found that problem if it wasn't for a friend that wandered into the shop that day and ask.."did you check the ignition switch?"

    If you don't have an dvom(I think that's the right letters) A meter..... You need one and a very basic idea of how to read it for working on this stuff. I taught myself so I have no clue what the correct terminology or how to walk someone through it. You just have to be able to read voltages, ohms, and continuity to check sensors and wires. The small scanners are helpful, but they just give you a starting point, sometimes the problem is further up the line than the code that they are giving.
    old digger likes this.

  12. #12
    us
    Dennis

    Jan 2012
    Montana
    White's MXT
    6,547
    5256 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    Thanks Nitric! I appreciate your input.

  13. #13
    us
    Sep 2017
    S.W. Mo.
    Garrett Ace 250
    77
    205 times
    All Types Of Treasure Hunting
    I know it's a real pain, but check all the frame to body, frame to engine, and frame to component grounds. My '93 was shutting off when it wanted to, but only when weather was hot. Until it got worse. A new fuel pump relay helped. Then when I changed the fuel pump I found the pump to frame ground at the pump connector had 4 or 5 strands of wire left. After I fixed that one I found something similar at the taillights. In all I found and fixed 10 or 12 bad ground wires or connections. It even made my check engine light stop coming on as much. Still chasing the EGR code though.

  14. #14
    us
    Jun 2013
    East Tennessee
    6,798
    6380 times
    First, I would recommend checking all of the fuses as these are quite often the culprits and the easiest first check. Check all the ECM Fuses and Fuel Pump Fuses. My daughter's Hyundai Santa Fe died on the highway about 10 miles from the house. At first I thought it was out of gas, so I put some gas in it but it would not hit a lick. Towed it to the house and destroyed the rear bumper on my' Ford Ranger because my daughter kept letting slack get in between my' truck and her' car. After switching out relays of which I keep extras and no luck, I changed out the PCM (ECM) since I had a good spare but again no luck. I went back and checked the fuses again and found that I had missed a little 10 amp Fuse for the ECM which I found was blown. Replaced the Fuse and Voilà (whallah) the car cranked right up. If you find that the Fuses are good, then go with the other recommendations. Normally, I would say to check the Relays but without the proper equipment and knowledge of how to check them, it is sometimes a useless endeavor unless you keep spares. I keep a lot of spare parts, Fuses and Relays and pick these up when I visit Pull-A-Part to find other parts I need.

  15. #15
    Charter Member
    us
    papa

    Feb 2017
    Georgetown, SC
    Fisher F75
    2,870
    4928 times
    Metal Detecting
    Distributor shaft may have broken. Pull your distributor cap and while someone is cranking the motor, you watch to see if the rotor is spinning. If not, you've found the problem. If it is spinning, good luck locating the issue.
    Nitric and old digger like this.


    "And so the population was gradually led into the demoralising temptations of arcades, baths, and sumptuous banquets. The unsuspecting Britons spoke of such novelties as 'civilisation', when in fact they were only a feature of their enslavement." Tacitus, Roman Senator and Historian, written AD 98.

 

 
Page 1 of 6 123 ... LastLast

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Need some Advice
    By kellyrae in forum Metal Detecting
    Replies: 10
    Last Post: Jan 19, 2019, 05:16 PM
  2. Really need some advice
    By golddigger65 in forum General Discussion
    Replies: 8
    Last Post: Apr 28, 2015, 07:48 PM
  3. I need advice
    By WILTON in forum Stamp Collecting
    Replies: 2
    Last Post: Mar 28, 2015, 09:23 PM
  4. ADVICE PLEASE
    By saltydog1733 in forum Metal Detecting
    Replies: 13
    Last Post: Feb 19, 2012, 09:12 PM
  5. Need Advice
    By Ryan1979 in forum General Discussion
    Replies: 5
    Last Post: Mar 21, 2007, 12:35 AM
Powered by vBadvanced CMPS v4.3.0