Question about 2000 Chevrolet 3500

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Won't Start Have confirmed there is no power to the fuel pump. Did this by interupting wire going to fuel pump and checking voltage - none. The gas gauge reads way past full when ignition is on. Lately engine cranked longer to start. Prior to this it was a quick starting motor. Any connection? Engine cranks normally. Does not start. Thank you for any help.

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  • foul Aug 04, 2008

    Checked voltage to fuel pump while cranking none. Installed new fuel pump relay and check all fues under hood and in cab. Ran direct wire to fuel pump from battery,nothing. Is their a connection between gas guage and pump. Gas reads way past full.

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I gave up and had it towed to a shop.

Posted on Aug 06, 2008

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Why wont 99 Chevrolet suburban start?


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Tip

Car That Turns Over But Won't Start problem?


There are many possibilities for this problem. But are some are very common for this problem.
1) Check out there is enough gas in your car.
2) Check the charge of the battery. It should be exact 12 volts. if the charge is low the engine will crank but won’t start.
3) Get it confirmed that there is fuel in car and fuel pump is also turning on
4) To check whether fuel pump is turning on or not try this procedure.Insert the key in the ignition, then turn the key to the ON position, and listen carefully from the back seat side you will here an electric noise for about 1 second every time you cycle the key on/off. If you hear nothing then your fuel pump is faulty or not receiving any power. In this case the fuel pump needs replacement.
5)But if fuels pump check out ok.then continues towards engine for finding fault. Check where engine is receiving the gas. Many times clogged fuel filter or blocked fuel injectors don’t let gas to flow towards the engine.
6) If the gas flow is proper towards the engine. Then route towards the spark plugs.
7)Check whether you get spark while you crack the engine. if no spark then it’s the problem in the spark plugs.
8) The spark plugs receive power from coil pack. If the coil pack is having proper voltage the fault in spark plugs is confirmed. But if the coils pack has low voltage then its time to replace the coil pack.

This will help. Thanks.






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Gas gauge quit working, now car won't start


Sounds like you dont have any power going to your fuel pump. You will have to drop your tank and with a light tester check the red wire for power. If you cant tell with one is the red wire it will be the secound wire going into the plug. If you dont have any power there then make sure your fuses are good. You will need help with this because it is very had to reach the key switch and check the wire the same time. It is on a relay switch and only stays on for 5 secounds. Good luck.

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Boyfriend has a 2003 Mini Coop S. Tried to start it up yesterday and it won't turn over. It cranks up, but it either seems clogged, or no flow of gas going thru(fuel pump)? Please advise. Mahalo


The poor performance of the car makes these faults to come up and undermine the working of the engine thereby resulting in the engine not firing.

So to start off we need to check from the fuel tank. Check if the fuel contains impurities and specially water. If so this can come up with the pumping when the tank gets empty and produce misfiring, splutter and jerks. So a check on the fuel filter will confirm this as it will be seen, if so remove and clean tank and change the filter. We then come to the fuel pump/carburetor as the fuel mixing and pressure is determined in this section. You need to have the pump calibrated if the pressure at the injector is low.

Then we must check with the electrics. The spark intensity is most important .Remove all plugs to check gap and condition of plugs. The black plug indication will confirm that the performance is bad whereas a fully fired plug without deposits must be the ideal view. Check the HT coil and the HT wires, if the intensity is bad this must be swapped and checked to confirm. DO NOT CHANGE any part without a confirmation by trying with a replacement from another vehicle or friend. Finally the LT trigger to the coils must be checked be it from the platinum points or an electronic ignition unit. The voltage of the trigger must be high to give the best HT output.

Now use a strobe to check the Timing on the engine. Adjust if needed to see the TOP DEAD CENTER-TDC- mark. If there is valve noise make sure that the tappets are set properly so that the valves seat firmly for the best compression. Also check compression of engine if there is imbalance on the engine or reduced power.

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Good battery, good starter. Leaves spark and fuel.
1. Remove 1 spark plug wire from a plug. Hold near engine block while someone "cranks" the engine.
- Spark (yes/no)
If yes, issue is fuel. If no, remove distributor cap and check for cracks. Also clean inside to remove rust and dirt. Besure that inside of distributor cap is reasonably clean and rust free. After that, reinstall cap.
Try to start engine. IF it is exactly same symptom.....
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If yes.....Confirm high voltage is present at center (input) wire to distributor (CAUTION:- 30,000 volts could be present... do NOT touch bare wire.) Use insulated plyers or similar to place this center wire near engine block to check for spark. Note that this voltage source is powered on as soon as the ignition key is in the "run" position.

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-------------
Confirm fuel is getting to intake.
I spray starting fluid into intake while cranking engine. It will "fire" if all else is good.
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