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My car want idle up

I can't get the code meter to read the codes I have tried three meter and they won't read when I crank it up and step on the gas the motor don't want idle up it stay the same when I put it in gear it will move forward and back it want pull off

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  • Cars & Trucks Master
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What kind of car?

Posted on Mar 30, 2015


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I have a 2006 Chevy cobalt and it wont take gas, it don't want to idle. It misses when you give it any gas or idling. I noticed that my check engine light started flashing. What can be the issue?


First step is to get the computer codes read. Your local auto parts dealer may read the codes for you at no cost. Once we have the codes, we can advise you further.

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V70 rpm high fluctuation at idle and engine stops


I would start by unplugging the throttle position sensor then start it and see if there is a change. Could also be the slow idle sensor or the crank position sensor? Have you looked that code up or had it computer checked? most the auto part stores here will let you use one in the parking lot hope that helps

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My 1999 jeep Grand cherokee 4.0 l6 is at it again. its almost 2 months without moving.Initially it threw codes P1391,0720 and 201 or 301(not sure).and now it cranks but cant start.The problem started after...


We need tat you confirm us exactly what fault code is stored there, in order to solve the problem step by step. Try turning the ignition key (with out start engine) three times, ON/OFF ON/OFF ON and read Pxxx codes on the Odometer, note it and replay with this data.

Goos luck.

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gas? diesel? if its a 6.0 gas they have problems with the crank sensor. check for fuel pressure and spark. read the computer codes. probably crank sensor or fuel pump

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97 nisson pathfinder won't start some times after sitting over night.


Check the 10amp fuse 21 in the fuse box. If that is good, try to find the manifold vacuum solenoid valve. It s near the air filter as shown in the figure below. It will have two wires in the connector and two hoses attached. Test the valve by applying battery power to see if it opens. If not, replace the valve. If it opens, check the connector and wiring. The above steps are intended to resolve the 1105 code.
I'm not sure this code is making the truck hard to start. With good spark and fuel pressure, the next thing I would check is for AC voltage at the Injectors. Put an AC voltmeter on one of the injector connectors and watch the voltage while someone cranks the engine. Your meter should read at least 5 volts AC.

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Ckp sensor circuit malfunction


If you look again you will notice those three answers were "suggested" by the website and have dates from previous months or years.
If you are still getting a crank sensor code, the problem could be the object on the crank the sensor is reading, or a problem with the wiring back to the computer.

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Changed alternator, cranks but won't stay cranked


your gonna need to plug a scanner in and check the ECM for trouble codes before going any further

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98 Expedition..5.4L 4WD..coded bank 1 bank 2....O2 sensors..LEAN....replaced both..no change..still same codes..now it won't stay running. Tried to code again..won't run long enough to get a c


all code readers will retrieve information stored while in the on position --doesnt need to be running ---when you rehook up scanner either resubmit or edit request with codes

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I am having a problem starting my car when it have sit for a long period of time like overnight. I would have to step slightly on the gas while turning the ignition key to get the engine to catch. When...


This sounds a lot like a knackered air valve. This valve regulates the idle speed. When it fails open, too much air gets in, forcing the system to richen the mixture ratio. When it fails closed, not enough air gets in causing you to make up the difference by stepping on the gas pedal. Depending on fuel system type (Bosch or Regina) it could also be a failing air mass meter (Bosch only) or a faulty MAP sensor (regina).

I see you changed the air valve, but did you check the connector for cleanliness? A low voltage on the connector makes it do weird things.

If the replacement air valve is known good, then that leaves the air mass meter (Bosch) or the MAP sensor (Regina). The 0xygen sensor is a PTC on the Regina system - so if you changed it make sure you got the correct type. Most Oxygen sensors are like galvanic batteries, not resistors, but on Regina fuel systems the latter type applies. It is just a resistor.

If you have a Regina fuel system (square ignitor on the driver's side) the MAP sensor will fail like this. Ensure the vacuum line is connected to it and the connectors are clean. If the system can't find the MAP sensor values, it guesses and you get a rich mixture by default.

If you made it this far, check out your ignition system - the crank angle sensor sometimes gets flaky and the ignition system starts to guess as to where Cylinder 1 is - and retards the timing, sometimes shutting off power to the ignition coil completely if it gives up.

Taking this one step further, the fuel pressure regulator could be bad - resulting in too high fuel pressure causing a rich mixture ratio.

Read the codes from the fuel and ignition system. This involves opening the Lego like cover to the diagnostic jack, driver's side. Position 2 is for the fuel system and position 6 is for the ignition system. You plug the test plug into each port respectively and press the button for at least one but not more than three seconds. Any blinking code other than 1-1-1 is a fault code. The system flashes the codes by blinking the LED, pausing, blinking it again, pausing, blinking one more time. For example, I have code 232 (Incorrect mixture ratio - 02 sensor at backstop) it would blink twice, pause, three times, pause, twice, pause and stop.

Always read the codes with the engine off and key in the ON position.

Good luck - take your time and don't waste money on mechanics' work you can do yourself. Not to knock any mechanics out there (I have been doing this work for 17 years!!) but some will take your money - best method to empowerment - DIY.

-AS

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1 Answer

Trouble starting, idleing,and cruising without shutting off.


three possible answers to look at ; fuel filter located at the back drivers side by the tank; throttle positiion sensor or crank position sensor[ worst case scenario fuel. pump is starting to fail. gas or fuel filter first; bring the car to advance or autozone for a free scan for trouble codes

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