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If i turn on the key to start run engine .its not responding .what is the problem

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  • Cars & Trucks Master
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Dead battery, bad starter solenoid, immobilizer engaged, ignition switch bad. Any of these things will cause that.

Posted on Dec 06, 2016

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Can a coil pack be on the verge of going bad and not firing enough to where the car won't start?


Yes it is possible. You really should start with the basics before spending any money.
When you turn the key to the on or run position (not start position), do all of the dash lights come on and especially the check engine or service engine light?
If so then step 2 is when turning the key from off to the run position, can you here the fuel pump run for approximately 3 seconds at the fuel tank. Sometimes you will have to remove the fuel cap and listen at the fuel fill pipe while someone else turns the key to the run position.
If both of those check ok, then you will want to verify spark while cranking the engine.
If any of those 3 items are not working, the car wont start. You will want to diagnose the item that is not working based on the descriptions above.
Good luck and respond back when you find which item is not working.

Feb 28, 2016 | 2004 Chevrolet Aveo

1 Answer

Engine turns over but will not start.


Hi there:

When the light comes on, one or more diagnostic trouble codes (DTC) are stored in the engine control module. These DTCs remain even if the light goes out. To address a Check Engine Light problem, the DTCs are retrieved and the appropriate troubleshooting information is followed in order to determine the problem.


Just scanned the computer and send us code number find it.

Hope helps.

Mar 14, 2012 | 1995 Dodge Ram 2500

2 Answers

Shouldn't there be fuel pressure with the key turned to the run position? I only get fuel pressure when the starter is engaged and turning the engine over.


no you will not have fuel pressure untill the engine is running

fuel pressure is not required to start the engine...only to keep it running

when you turn the key on the computer send a signal to turn the fuel pump on for a second and prime the engine...once it starts the fuel pump relay kicks the fuel pump on then you have pressure.

Feb 06, 2010 | 1993 Toyota Corolla

3 Answers

97 Geo Metro will not start


it sounds like the battery charge battery and load test after you get it running check charging system

Aug 26, 2009 | 1997 Geo Metro

1 Answer

My 1998 ford expedition won t start and the theft


the light blinks when the system is armed. Normal.

Your key has to be able to communicate with the receiver in the ignition area. Does your other key work ok?

Anti-Theft The passive anti-theft system (PATS) uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user.
  • During each vehicle start sequence, the ignition key identification code is requested by the PATS module.
  • If the key's ID code has been programmed into the system, the vehicle powertrain control module (PCM) (12A650) is allowed to operate; this allows the vehicle to start.
  • If the key's ID code is not programmed into the PATS module, or if no encoded key is detected, then the vehicle PCM is disabled.
The PATS module, located under the driver side instrument panel, communicates the state of the security system to the PCM via the module communications network. The PCM, based on the communications from the PATS module, will determine if the vehicle's engine will be enabled to start. If the PCM prevents the vehicle from starting because of PATS, the PCM will store a DTC in memory.
-------------------------------------------------------------------------
The anti-theft vehicle protection system utilizes the THEFT indicator, located in the instrument cluster (10849), when the ignition switch is turned to the RUN/START position. The indicator provides system prove out and operating status to the customer or technician.
Each PATS ignition key holds electronics that give each key a unique ID code.
The PATS will activate the indicator signal when the ignition switch is turned to the RUN/START position. The THEFT indicator will turn ON for two seconds, then turn OFF.
If the THEFT indicator flashes for one minute or more, this indicates that there was no key code received.
When the vehicle ignition switch is placed in either RUN or START, the PATS module requests the ignition key ID code. The PATS module requests the ignition key ID code by supplying power, ground, and the carrier signal to the transceiver to energize the ignition key. After the energize period, the key transmits its ID code to the transceiver module, which sends it to the PATS module.
The PATS module then compares the received KEY ID code to those stored in memory (16 maximum). If the ID matches, the PATS module sends an enable signal to the PCM over the module communication network.
The passive vehicle protection system utilizes the engine management capabilities of the PCM to enable or disable the vehicle engine. The module communication network is used to send and receive messages to and from the PCM.
Within one second after engine start, the PCM must receive an enable signal from the PATS module through the module communication network or the engine is disabled before the vehicle can be moved.
If the PATS module recognizes a stored ignition key code but there is a module communication network concern preventing the PCM from recognizing the start enable signal from the PATS module, the vehicle engine will be disabled. If this happens, the PATS module will flash the THEFT indicator for one minute, then flash diagnostic trouble code 16 ten times to indicate there is a problem with the module communication network circuits or the PCM is not responding properly.
The passive vehicle protection system will disable the vehicle from starting if there is a:
  • Damaged encoded key.
  • Unprogrammed key.
  • Non-encoded key (key has no electronics).
  • Wiring concern.
  • Transceiver concern.
  • Control module concern.
  • Module communications network concern.
  • ----------------------------------------------------------
Key Programming —Spare Key NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.
NOTE: Performing this procedure does not erase existing programmed keys.
  1. Insert the programmed key in the ignition. Turn to RUN.
  1. THEFT indicator proves out after two seconds.
  1. Remove the programmed key.
  1. Within 15 seconds, insert the new key in the ignition and turn to RUN.
  1. THEFT indicator proves out after two seconds.
  1. The extra key is now programmed.
------------------------------------------------------------------------------------
Key Programming —New Key (Without Diagnostic Tool) NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.
  1. Insert the nonprogrammed key in the ignition and turn to RUN.
  1. THEFT indicator flashes rapidly.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. All originally programmed keys are now erased, and only the key in the ignition is programmed.
  1. Additional keys may be programmed; refer to Key Programming—Spare Key .
---------------------------------------------------------------------------------------

Jun 17, 2009 | 1998 Ford Expedition

1 Answer

Problem To Start


It s fix. Not the wiring problem. The battery is lack of power. So I charged it only and it seems to be fine. thanks anyway

Jun 01, 2009 | 1992 Daihatsu Charade

1 Answer

1991 gmc sierra wont start


There are so many things that could have caused this problem to occur. Here are some of my suggestions:

1. Blockage in the air supply to mix with the fuel. Throttle body might need cleaning

2. Compression in the cylinders might be low, probably due to large ring gaps. If you can get your hands on a compression tester to check the compression values of each cylinder, so as to ensure they are in operable range. By the way, was the vehicle smoking heavily when in operation?

3. Is your battery giving a good turn over of the engine? A weak battery can cause an engine not to start. The engine would turn over but just won't start. (Is the engine turning over when you try starting, or does the engine not responding when turning the key?)

4. Igniter in the distributor might need electrical checks to ensure proper electrical circuitry. Liaise with an auto-electrican about this.

Dec 29, 2008 | 1992 Oldsmobile Bravada

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