2001 GMC Jimmy Logo

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Laura Coppinger Posted on Aug 07, 2017
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When I try to start my 2001 jimmy, it locks up and won't turn over

We just changed the fuel pressure regulator, in line fuel filter, cleaned the gas tank, checked fuel pump and it was good, new plugs and wires, just changed the oil too. did not have this problem until after we changed the oil. before acted like it was out of gas (probably was, so we added 5 gallons). this car has been down for two months and this is getting seriously old. any help is appreciated.

1 Answer

jack layton

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  • GMC Master 5,569 Answers
  • Posted on Aug 07, 2017
jack layton
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Can you turn the crankshaft by hand? Use proper size socket and breakover, hopefully, there is a pulley bolt on the end of crankshaft. If it won't turn, take the belt loose and remove spark plugs in case of hydrostatic lock, fluid in the cylinders.
You said it locks-up, that what I am going by. Meaning the engine mechanically locks up. It could be internal engine problem?

1 Related Answer

dwls69

Dan Lewis

  • 6 Answers
  • Posted on Apr 19, 2012

SOURCE: when I try to start my 2001 jimmy, it locks up and won't turn over

are any of the other plugs wet if not i would go to the junk yard and get 2 used injectors i doubt it did anything to converter if other plugs are wet to i'd say you need a new fuel rail and injectors kerosene probley melted or plugged the rubber inside put lots of gas in it to delute kerosene not just 5 gal and maybe a bottle of drygas kerosene sometimes has water in it

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1helpful
1answer

When I try to start my 2001 jimmy, it locks up and won't turn over

are any of the other plugs wet if not i would go to the junk yard and get 2 used injectors i doubt it did anything to converter if other plugs are wet to i'd say you need a new fuel rail and injectors kerosene probley melted or plugged the rubber inside put lots of gas in it to delute kerosene not just 5 gal and maybe a bottle of drygas kerosene sometimes has water in it
0helpful
1answer

The fuel is not getting to the engine in my 2001 Ford Taurus. The car will start but it won't stay on. Please help

possible problems would be fuel regulator problems, bad fuel pump, clogged fuel return line, clogged fuel pickup screen, clogged fuel filter, or clogged or stuck fuel tank breather valve/line/cap. easiest things first. look for a disconnected, lose, or warn vacuum line from the fuel pressure regulator to the intake manifold. next try starting the car without the fuel cap. if that works you probably need to clean or replace your gas cap. next i would check for fuel pressure. u can buy a pressure gauge from autozone for around 30 bucks and some will just do it for you. if youre pressure is good while the ign is on but when the car starts it drops your best bet is something is clogged. if it doesnt drop then you may have dirty injectors, bad spark plugs, or a bad distributor. put some injectory cleaner in there are run the car a few times, replace your plugs and wire, and have your distributor tested at autozone. if all that is fine/doesnt change anything you have an idle problem somewhere. test this by pressing the gas down a little bit while starting the car. if it stays running then you have idle problems. if so just comment and i'll help you out. i hope for your sake your regulator vacuum line is just unplugged or leaking. good luck to ya
0helpful
1answer

Motor turns over won't start. Cleaned terminals, put in new battery, still won't start. Removed gas cap to vent air on hot day, still won't start. Lights all come on, all electrics appear to...

Your problem may be one of the following:
First check or just replace the fuel filter. Usually located under the car in front of the rear axle, drivers side.
Next, the fuel pump may be worn out. Usually they get loud or stop working (running).
Next, check the fuel pressure regulator. Usually located on the front fuel rail, drivers side.
Is the vacuum line attached? Not leaking or rotted?
Also, do you smell a strong fuel odor when it won't start? May be one or more stuck-open injectors, or the coil pack is bad.
Checking these in the order listed will more than likely fix your problem.
The clicking noise indicates the battery can no longer run the starter, which also means the fuel pump won't run either.

It could be a fuel issue. How old is the fuel filter? Can you hear the pump run for a few seconds when you turn the key on? Try turning the key to ON without trying to start engine three times waiting for the pump to stop running each time. Then try to start the engine. If it starts, Its a form of Vapor lock caused by the extreme heat we have had lately, and a weak fuel pump.

If none of this works, try a new fuel filter first. From there have someone check the fuel pressure regulator and then the pump. If you are in need of a new pump, take my word for it and spend the money to get one from a Dealer, and not from your favorite parts store. Most parts store parts are made in China and they are JUNK.

0helpful
1answer

Won't start after short trip like its vaper locked

STARTING / IDLING PROBLEMS / MISSING

Your problem may be one of the following:
First check or just replace the fuel filter. Usually located under the car in front of the rear axle, drivers side.
Next, the fuel pump may be worn out. Usually they just stop working (running).
Next, check the fuel pressure regulator. Usually located on the front fuel rail, drivers side.
Is the vacuum line attached? Not leaking or rotted?
Also, do you smell a strong fuel odor when it won't start? May be one or more stuck-open injectors, or the coil pack is bad.
Checking these in the order listed will more than likely fix your problem.
The clicking noise indicates the battery can no longer run the starter, which also means the fuel pump won't run either.

It could be a fuel issue. How old is the fuel filter? Can you hear the pump run for a few seconds when you turn the key on? Try turning the key to ON without trying to start engine three times waiting for the pump to stop running each time. Then try to start the engine. If it starts, Its a form of Vapor lock caused by the extreme heat we have had lately.

If none of this works, try a new fuel filter first. From there have someone check the fuel pressure regulator and then the pump. If you are in need of a new pump, take my word for it and spend the money to get one from FORD, and not from your favorite parts store. Most parts store parts are made in China and they are JUNK.

Have you hooked a scanner to the computer and checked the oxygen sensor(s)? If they are bad they could lean out the engine.

VAPOR LOCK
Check the following:
Cooling system working properly including fans.
Under hood fuel lines touching coolant or heater hoses.
Fuel lines under vehicle close to or not shielded from exhaust pipe, converter, muffler. Fuel lines pinched or crushed.
Fuel filter changed recently.
Fuel pump pressure.
Cheap(Bad) gas.

0helpful
1answer

I have a 93 Mercury Sable i have put a new fuel filter on it when it gets hot or when i drive it a long distance it shuts off and will not start again for at least 15 min, then i can get a bit farther down...

VAPOR LOCK
Check the following:
Cooling system working properly including fans.
Under hood fuel lines touching coolant or heater hoses.
Fuel lines under vehicle close to or not shielded from exhaust pipe, converter, muffler. Fuel lines pinched or crushed.
Fuel filter changed recently.
Fuel pump pressure.
Cheap(Bad) gas.


STARTING / IDLING PROBLEMS / MISSING

Your problem may be one of the following:
First check or just replace the fuel filter. Usually located under the car in front of the rear axle, drivers side.
Next, the fuel pump may be worn out. Usually they just stop working (running).
Next, check the fuel pressure regulator. Usually located on the front fuel rail, drivers side.
Is the vacuum line attached? Not leaking or rotted?
Also, do you smell a strong fuel odor when it won't start? May be one or more stuck-open injectors, or the coil pack is bad.
Checking these in the order listed will more than likely fix your problem.
The clicking noise indicates the battery can no longer run the starter, which also means the fuel pump won't run either.

It could be a fuel issue. How old is the fuel filter? Can you hear the pump run for a few seconds when you turn the key on? Try turning the key to ON without trying to start engine three times waiting for the pump to stop running each time. Then try to start the engine. If it starts, Its a form of Vapor lock caused by the extreme heat we have had lately.

If none of this works, try a new fuel filter first. From there have someone check the fuel pressure regulator and then the pump. If you are in need of a new pump, take my word for it and spend the money to get one from GM, and not from your favorite parts store. Most parts store parts are made in China and they are JUNK.

Have you hooked a scanner to the computer and checked the oxygen sensor(s)? If they are bad they could lean out the engine.

0helpful
1answer

New fuel pump, new cap, plugs and wires, clean air filter. My 98 Jimmy sounds like its missing, it boughs down. Mass air flow regulator? Fuel regulator? Also using a lot of gas lately.

You are right, all of the symptoms are pointing to a fuel pressure regulator. Also try inspecting your vacuum line going to your fuel pressure regulator.
Matt
0helpful
1answer

Low fuel pressure on neon 2003,have change fuel pump,but pressure is low can start if tank is full

Hi.

Check the fuel filter and fuel pressure regulator. They are part of the same assembly and are located on top of the fuel pump. To replace the regulator # Disconnect fuel supply line at the Filter/Regulator nipple and releas locking spring tab (2 in diag.) on the regulator, then turn counterclockwise and pull out. To test regulator use a gauge like this in fuel lines:Pump Pressure Tester.
Pressure in 2003 should be 58psi (48 in 2001 engines). Pressure will drop of about ten psi when you start engine.

There is also an automatic shut down relay ASR. If problem is the ASR the pressure will go down when the relay cuts off power to pump. Read voltages and see if the problem is electrical first before going for the regulator.
0helpful
1answer

1993 GMC Jimmy won't throttle up..changed fuel pump...sounds like fuel is running back into tank

Check fuel pressure regulator.Start engine hook fuel gauge to fuel line check pressure ready then pull the vacuum hose of the fuel regulator if pressure rises 5-10 psi then its good.
4helpful
3answers

I have a 1995 GMC Jimmy that won't start.

It sounds like a faulty fuel pressure regulator. When you turn the key to the on position the fuel pump starts for an instant to build pressure in the fuel line. If the pressure regulator has allowed too much leakage since the last start then the fuel pump does not have enough time to prime the line. The fuel pressure will still measure ok when the car is running because the leakage is very low. Try turning the key off and on a few times prior to starting and see if the extra pump priming steps help. Also check the vacuum line to the regulator because it needs vacuum to work correctly.
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