Car reving high in idle the goes to nothing

You need to have the ABS codes checked before throwing parts at it. Once I know the code, I can help.

You need the exact canister for the light to go out assuming it is a good canister.

Roy

Can a vacuum leak cause hesitation,up and down idling and shutting the car completely off? it does it to me in the morning only and then fine when used again at lunch.

Yes, it can. Check the base gasket on the throttle body. A common area of leaking.

Roy

The mass air flow is the engine light on but I replaced it brand new, but I do have a leak. can that cause the wrong reading and cause the car to jerk an hesitate and shut off in morning?

What is the code for the mass air flow?

Roy

P0102

Maybe I’ll put a cap over the intake manifold.

Description

CIRCUIT DESCRIPTION

The Mass Air Flow (MAF) sensor measures the amount of air which passes through it into the engine during a given time. The PCM uses the mass air flow information to monitor engine operating conditions for fuel delivery calculations. A large quantity of air entering the engine indicates an acceleration or high load situation, while a small quantity of air indicates deceleration or idle. The MAF sensor produces a frequency signal which can be monitored using a scan tool. The frequency will vary within a range of around 2000 Hertz at idle to about 10,000 Hertz at maximum engine load. DTC P0102 will be set if the signal frequency from the MAF sensor is lower than the possible range of a normally operating MAF sensor.


CONDITIONS FOR SETTING THE DTC

- The engine is running.

- Throttle Position (TP) angle is less than 50%.

- System voltage is greater than 8 volts.

- MAF signal frequency is less than 1200 Hertz.

- The above conditions present for longer than 0.5 seconds + 100 3X reference periods (33 crankshaft revolutions).

ACTION TAKEN WHEN THE DTC SETS

- The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the first trip in which the diagnostic test has been run and failed.

- The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.


CONDITIONS FOR CLEARING THE MIL/DTC

- The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.

- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a fault.

- The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.


DIAGNOSTIC AIDS

A low minimum air rate can cause DTC P0102 to be set during deceleration. Check the minimum air rate as follows:

1. Run the engine until fully warm (above 85°C / 185°F).

2. Disconnect the IAC.

3. Install a J 37027-A IAC System Monitor.

4. With the engine idling, command the IAC valve to the fully extended position (0 counts).

5. With the IAC fully extended, observe the Mass Air Flow reading on the scan tool.

6. Check for conditions that can cause a low minimum air rate, including throttle bore and throttle plate coking if the Mass Air Flow reading is less than 2.27 g/sec.

7. If the minimum air rate is less than specification, clean or replace the throttle body as necessary. Go to Throttle Body Assembly.

Check for the following conditions:

- Poor connection at the PCM - Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.

- Misrouted harness - Inspect the MAF sensor harness to ensure that it is not routed too close to high voltage wires such as spark plug leads.

- Damaged harness - Inspect the wiring harness for damage.

- If the harness appears to be OK, observe the scan tool while moving connectors and wiring harnesses related to the MAF sensor. A change in the display will indicate the location of the fault.

- Plugged intake air duct or filter element. - A wide-open throttle acceleration from a stop should cause the Mass Air Flow displayed on a scan tool to increase from about 4-7 gm/s at idle to 100 gm/s or greater at the time of the 1-2 shift. If not, check for a restriction. If DTC P0102 cannot be duplicated, the information included in the Fail Records data can be useful in determining vehicle mileage since the DTC was last set. This may assist in diagnosing the condition.


TEST DESCRIPTION

Number(s) below refer to the Step number(s) on the Diagnostic Table:

2. This step verifies that the problem is present at idle.

5. A voltage reading of less than 4 or over 6 volts at the MAF sensor signal circuit indicates a fault in the wiring or a poor connection.

6. Verifies that ignition feed voltage and a good ground are available at the MAF sensor.

13. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.

Can that MAF sensor be on due to the leak possibly to the intake manifold?

Yes, You need to follow the flow chart.

Roy

Is the ABS sensor behind the wheels in the rear? Do bolts have to come off?

The rear is on top of the differential housing.

Roy

Okay, so I have to get under it to get to the ABS. This vacuum leak must be causing the codes p0507 and p0102?

Yes it could. Do the diagnostic.

Roy

If I’m missing the air pump relay could that cause these problems?

Yes, it will.

Roy

I had to scrape away the old EGR gasket. so now it’s flushed, but now when I start the car it comes on then turns right off,

Did you use a new gasket?

PASS-Key-II is a theft deterrent system which prevents the vehicle from starting if the Ignition Key "Resistance Code" is not recognized by the Body Control Module. If the Resistance Code is not recognized, the Engine is prevented from starting in two ways: battery voltage from the Ignition Switch to the starter is disabled by a Theft Deterrent Relay and fuel to the fuel injectors is stopped without the presence of a fuel enable signal. Also, if the vehicle is equipped with the Universal Theft Deterrent System (UA6), an unrecognized "Resistance Code" will trigger an audible alarm cycle.

Resistor sensing contacts are located in the Ignition Key Lock Cylinder. These contact the Key Resistor Pellet on the key when it is inserted. When the lock is rotated, Ignition voltage is applied to the Body Control Module and pellet resistance is read at this time. The Pellet resistance is read across connector C3 terminals "C2" and "D7" which is then compared against the resistance value stored in the module. If the Key Resistance Pellet is the proper resistance, connector C3 terminal "C11" is grounded, energizing the Theft Deterrent Relay. At the same time, a signal is applied at connector C3 terminal "D8" to enable the Powertrain Control Module (PCM). When this signal is received by the PCM, it allows fuel injector pulses to begin. If the Key Resistor Pellet is the wrong value, the Body Control Module will shut down for 3 minutes + or - 18 seconds. During this interval, there will he no output at connector C terminals "C11" or "D8" and the SECURITY" Indicator will illuminate. The Ignition Switch input is ignored during this shut down period. For this reason, the timer will run and the "SECURITY" Indicator will rein am illuminated with Ignition on or off. Once the timer has completed its 3 minute + or - 18 second shut down, the next time Ignition is cycled from off to on, the Body Control Module timer is reset. A key having the correct code can the!' he used to start the Engine.

Car only stays on while holding the gas.

That could be a vacuum leak or the idle air control.

You need a scan tool to manipulate the motor to see if it is being commanded on and off.

Roy

If I replaced the EVAP canister yesterday and a line fell off of it. would it cause the car to start then shut off but stay alive while holding the gas? Don’t know why it stays on when holding gas.

No, it would not.

I suggested what to check and what you need to check it.

Roy

Okay problem solved now I added a new throttle position sensor because the code p0122 came on. The car idles correctly but it doesn’t shift. Is there a reset??

No, there is no reset for the TPS.

Did the transmission shift before the repair of the TPS?

Roy

Yes it did and it’s the only code on.

What is the voltage of the TPS at idle?

Also, check it at wide open throttle as well.

Roy

I found just now the radiator hose split.

Okay.

Roy

Okay, I fixed the code. my last and final question thanks for all the help car is perfect now. But what would cause the upper radiator hose to start overflowing an trying to spew out?

It could be just a weak or worn out hose or a failure from too much cooling system pressure.

Roy

How many ABS sensor are there. I know one on the rear differential housing is there another?

3. 2 in the front and the rear one.

Roy

How do you clean the front one if it’s part of the wheel bearing?

You do not clean it. You replace it.

Roy

Camaro complete now my 04 Jeep Grand Cherokee 4wd V6 has a engine code p1281

I would love to help but site rules are 1 vehicle per question.

You need to go back to the beginning of the site and start a new question. Then I will be glad to help you more.

Roy

Hey man I appreciate all the help first time since 2011 that car has ran and had zero engine light and all systems ready. Thanks.

You are welcome.

Always glad to help.

Roy

Camaro I changed the oil pressure switch and oil is spewing everywhere.

You may have damaged the switch installing it.

Roy