Question about 2005 Chevrolet Malibu

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97 Malibu cranks but wont start Theft light is not on. If you keep trying (15 to 20 min)eventually it will run as long as the RPMs stay above 1000. Fuel pump won't come on unless I jump across the relay, or it catches one of those magic running moments. Gas gauge doesnt come off of empty unless it decides to run. I probed the voltage on the ICC relay Normal 12 volts on the #30 pin but only 7.9 volts on the #85 pin and 2.3 volts on the # 86 (computer switch pin) Throttle position sensor voltage shows 5.12 volts. I checked the computer case to ground and it showed .013 ohms. I checked the other grounding locations and several points on the body. I checked both under the hood, under the dash and along the fuel pump routing all the way to the computer. ** It has an aftermarket cruise control installed. It has not worked for some time. If you toggle the switch on and off the dash lights and gauges will flicker and sometimes stay off including odometer and shift select indicator. I have completely removed it with no change.

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  • Chevrolet Master
  • 11,492 Answers

What is the correct year ? Above your post it says 2005 Chevrolet Malibu but your post shows 1997 ????? An what size engine ? 3.1 or 3.4 or 2.4 L I would also say your crankshaft position sensor could be bad , but that's just a guess ! Without testing that's all anyone on here can do , guess . Videos on youtube showing how to test crank sensor !

Plus you state that you ohm check ground connections , sorry but that's not the way to check . You do voltage drop testing ? Suggest you watch this . The Trainer 47 What measuring voltage on the ground side means

The Trainer 29 Understanding How Electrical CIrcuits Work and How to Test... How to test for short to ground ohmmeter vs test light

GM Fuel Pump Relay Testing

Posted on Mar 04, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 112 Answers

SOURCE: Fuel Gauge Flickers but does not work properly-

there is a fuel senor inside of the tank and it could very well be the problem

Posted on Jul 08, 2009

  • 5 Answers

SOURCE: 1987 Chevrolet S-10 Pickup1987 chevy s10 2.5l tbi

Check the trottle body postioning sensor...

Posted on Jul 19, 2009

  • 118 Answers

SOURCE: 2001 chevy silverado 1500 headlights wont shut off

You will have to have the dealer reset the security light to restart vehicle.Check all engine and chassie grounds because this is where the lighting would exit the vehicle.It sounds like a ground burnt through.

Posted on Jul 20, 2009

blueextc3221
  • 15935 Answers

SOURCE: 2001 Chevy Malibu, 89,000 miles, 3.1 engine, won't start

CLICK HERE for the injector schematic.
CLICK HERE for the Ignition schematic.

Since the PCM uses info gatheres from the crank and cam sensors to calculate ignition - and there are no OBD codes - in all likelihood, the PCM itself is bad.

The Ignition Module, also transmits to the PCM.

It appears after all your testing - that the PCM is at fault.

It does not error report on itself (unfortunately).

The ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is necessary (distributorless ignition) or possible.

Please see the following....

The ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is necessary or possible.
The engines covered by this manual are equipped with distributorless ignitions, ignition timing is controlled by the Powertrain Control Module (PCM), as applicable. No adjustments are possible. If ignition timing is not within specification, there is a fault in the engine control system. Diagnose and repair the problem as necessary.
Ignition timing is the measurement, in degrees of crankshaft rotation, of the point at which the spark plugs fire in each of the cylinders. It is measured in degrees before or after Top Dead Center (TDC) of the compression stroke.
Ideally, the air/fuel mixture in the cylinder will be ignited by the spark plug just as the piston passes TDC of the compression stroke. If this happens, the piston will be at the beginning of the power stroke just as the compressed and ignited air/fuel mixture forces the piston down and turns the crankshaft. Because it takes a fraction of a second for the spark plug to ignite the mixture in the cylinder, the spark plug must fire a little before the piston reaches TDC. Otherwise, the mixture will not be completely ignited as the piston passes TDC and the full power of the explosion will not be used by the engine.
The timing measurement is given in degrees of crankshaft rotation before the piston reaches TDC (BTDC). If the setting for the ignition timing is 10 BTDC, each spark plug must fire 10 degrees before each piston reaches TDC. This only holds true, however, when the engine is at idle speed. The combustion process must be complete by 23° ATDC to maintain proper engine performance, fuel mileage, and low emissions.
As the engine speed increases, the pistons go faster. The spark plugs have to ignite the fuel even sooner if it is to be completely ignited when the piston reaches TDC. Spark timing changes are accomplished electronically by the engine and ignition control computers.
If the ignition is set too far advanced (BTDC), the ignition and expansion of the fuel in the cylinder will occur too soon and tend to force the piston down while it is still traveling up. This causes pre ignition or -knocking and pinging-. If the ignition spark is set too far retarded, or after TDC (ATDC), the piston will have already started on its way down when the fuel is ignited. The piston will be forced down for only a portion of its travel, resulting in poor engine performance and lack of power.
Timing marks or scales can be found on the rim of the crankshaft pulley and the timing cover. The marks on the pulley correspond to the position of the piston in the No. 1 cylinder. A stroboscopic (dynamic) timing light is hooked onto the No. 1 cylinder spark plug wire (2.2L engine only, on the 2.4L engines, special adapters are needed) . Every time the spark plug fires, the timing light flashes. By aiming the light at the timing marks while the engine is running, the exact position of the piston within the cylinder can be easily read (the flash of light makes the mark on the pulley appear to be standing still). Proper timing is indicated when the mark and scale are in specified alignment.


WARNING When checking timing with the engine running, take care not to get the timing light wires tangled in the fan blades and/or drive belts.

The engines covered by this manual are equipped with distributorless ignitions, ignition timing is controlled by the Powertrain Control Module (PCM), as applicable. No adjustments are possible. If ignition timing is not within specification, there is a fault in the engine control system. Diagnose and repair the problem as necessary.




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Posted on Aug 18, 2009

  • 708 Answers

SOURCE: 98 chevy cavalier cranks but wont start changed

try to start the car, than the anti theift would shut the car off. you wait ten min with the key on, until you see the anti theift flash or disapear. than turn key to off position and try to start it. this will reprogram the computer.. Good luck.

you can also try disconnecting the battery for 30 minutes

Posted on Oct 07, 2009

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1 Answer

I have a 2001 Chevy Malibu that wont start. All of the lights on the dash come on and when they settle.. only the battery and the check engine light are on. It has a full tank of gas and full oil and...


When you turn the key to the start position does the starter spin the engine ? The engine cranks no start ! Or nothing happens when you the key to start position ? no crank no start ? Is the anti-theft light lit on the instrument cluster (SECURITY) ? If the starter spins the engine does spin slow or normally ? Is there spark , fuel pressure ? Testing these thing's would be the place to start if the engine spins ! Videos on youtube showing how !

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You need to reset the theft system. To do this, try to start it. It should start and die. Then after it dies and the theft light is flashing, leave the key on for 10 minutes. After 10 min, the theft light should go out. After the theft light goes out, turn off the key. Count to 5, then restart it. Then it should work.

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1 Answer

2001 Chevy Malibu the car cranks but wont start I can hear the whine of the fuel pump coming on when I engage the ignition switch to on position, I can prime it and it will run for a few seconds...


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Aug 18, 2010 | 2001 Chevrolet Malibu

1 Answer

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Dec 15, 2008 | 2003 Chevrolet Malibu

1 Answer

Theft system 2000 malibu ls


try this: turn key on, crank starter for 1 second, leave key on for 10 minutes. after 10 min. shut key off and repeat 3 times. (on second try, crank a sec. or so longer, the reprogram may take off right away. if not, repeat make sure battery is strong, key could be on for 1/2 hr. sometimes engaging emergency brake before key is turned on prevent daytime running lites to come on to save battery power (if equipped). been through it, thought i'd mention it

Nov 16, 2008 | 2000 Chevrolet Malibu

1 Answer

97 expedition cranks,but not starting


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97 malibu won't start theft system


this guys a genuis turn switch on wait til the theft light goes out turn off for 10 seconds and it will start

Jun 05, 2008 | 2003 Chevrolet Malibu

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