My ignition is busted on my 1998 Chevy S10 allowing me to start it with anything but have to disconnect battery for long periods of time if it's idle can this cause shifting and braking problems?

test and check battery--battery terminals especially positive --starter

no you need the passlock security ignition system to start vehicle other words turn key vehicle wont start

run fault codes and look for MAF/MAP/VAF sensors and ambient temp sensor as faulty.

Have it checked for DTC'S - diagnostic trouble code's . I suspect the problem is with the tdm module or the ignition switch ???? Assuming will only get you into trouble . If the PCM - engine computer does not see the right coded meassage from the TDM it won't turn on the fuel injectors or it will cut them off in two seconds . .
Buick Security Systems 1998 Chevy is the same .
Ignition Key With Wrong Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs one of the two following actions when you attempt to start the vehicle with a wrong ignition key:
• There are 15 PASS-Key® II resistance ranges. The PASS-Key® II resistance may be one of the 14 valid but incorrect PASS-Key® II resistance ranges. The theft deterrent module will perform the following actions when you attempt to start the vehicle (if the condition is present during an engine start attempt or for 1 second any time after the engine has started):
• Turns on the SECURITY indicator
• Sends a password to the PCM through the fuel enable signal circuit
• The password disables fuel delivery to the engine.
• Disables the theft deterrent relay, which disables the starter circuit
• Disables sampling of the PASS-Key® II resistance for 3 minutes
• The 3 minute time period is called the shut-down period.
• Disconnecting the battery will not clear the timer sequence. The timer sequence will resume when battery power is restored.
• Inserting the proper key during the vehicle shut-down period will not start the engine. The engine will not start until the shut-down period has elapsed.
• After the shut-down period, the engine will start if the correct ignition key resistor pellet is used.
• The PASS-Key® II resistance may be correct and allow the engine to start. Later during the same ignition cycle, the PASS-Key® II resistance may be one of the 14 valid but incorrect resistance ranges. The theft deterrent module will perform the following actions:
• Enters the fail-enable mode
• Turns ON the SECURITY indicator
• Sends a password to the PCM through the fuel enable signal circuit when more attempts to start the engine occur
• The password allows the fuel enable circuit to deliver fuel to the engine.
• Enables the theft deterrent relay, which also enables the starter circuit.

Ignition Key With Correct Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs the following actions when the correct ignition key is used in order to start the vehicle:
• Enables the theft deterrent relay. The theft deterrent relay enables the starter unit.
• Sends a password to the Powertrain Control Module (PCM) through the fuel enable signal circuit. As a result, the PCM allows fuel delivery to the engine.


By pass theft system .
GM VATS Key Resistor Key Security Bypass

"Busting up" is hard to diagnose. A person needs to feel how it runs which would give a better idea if its fuel or ignition related.
I would suggest a tune up if it has not been done in some time (plugs, wires, cap, rotor, etc.). Possible ignition module. Those can be tested at an Auto Zone and they test them for free.

Also change the fuel filter. A pressure test would be best as you can see what pressure the pump is giving at idle and under throttle to aide in determining if its a Fuel Pressure Regulator.

And check any vacuum hoses. Bend them a bit where they attach to something. They can look good but be split and bending them will show.

{: ) Anytime the powertrain control module (PCM) or the battery is disconnected, the PCM loses power, or the PCM is reprogrammed, the PCMs learned idle position is lost. The engine idle is unstable when the learned idle position is lost. For a 2001 Yukon XL, you can try these steps: Automatic Transmission

1. Turn OFF the ignition.
2. Restore the PCM battery feed. ( IF it was disconnected)
3. Turn OFF the A/C controls.
4. Set the parking brake and block the drive wheels.
5. Start the engine.
6. Ensure that the engine coolant temperature is more than 80°C (176°F).
7. Shift the transmission into Drive.
8. Allow the engine to idle for 5 minutes.
9. Shift the transmission into Park.
10. Allow the engine to idle for 5 minutes.
11. Turn OFF the engine for 30 seconds.

Manual Transmission

1. Turn OFF the ignition.
2. Restore the PCM battery feed. (IF it was disconnected)
3. Turn OFF the A/C controls.
4. Set the parking brake and block the drive wheels.
5. Place the transmission in Neutral.
6. Start the engine.
7. Ensure that the engine coolant temperature is more than 80°C (176°F).
8. Allow the engine to idle for 5 minutes.
9. Turn OFF the engine for 30 seconds.

After the procedure, you can do testing and observations. If unsuccessful, you may repeat the steps.
Also, the best time to relearn idle is after a throttle body clean (from carbon deposits)

sounds like the starter is bad

Yes it could well possibly be the ignition switch or starter solenoid or intermittent ignition switch starter contact.Again check connections on battery especially the ground connection at the block.Also there could be air in the fuel line any of these could be hindering start up!

Check if your wires are on TIGHTLY on the battery, if one loses a touch, your car will shut off. If you go over a tiny bump, or turn to one side or another, they could disconnect, causing your car to lose a + or a - cable connection. Which would very well make your car shut off. Also, check for any corrosion on the battery terminals. Good luck.

sounds like your drawing moister change the dis cap prob has a hair line crack in it!!!