Question about Chevrolet 1995-1997 Chevy 3500 Truck Ignition Starter Alarm Switch

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350 CI Gas Engine Missing

Only when in high torque load conditions, as in highway conditions at 45 - 65 mph and begin to enter a slight incline grade in overdrive,(with cruise on or off) keeping throttle steady engine rpm naturally begins to slowly reduce, the Erratic Missing Symptom begins and maintains until grade is overcome. During incline grade if throttle is increased to shift transmission down symptom may reduce but is still present. Under flat road and city driving conditions problem never presents itself. After running several fuel treatments and conditioners, replacing fuel filter, distributor cap, rotor, wires and plugs problem persists. 125 K. I run premium grade fuel. Midrange or regular octane greatly increases symptom and in addition adds ping.

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  • mikekaycain Jan 07, 2009

    it wants to pop back through the throdle body like it is out of time it is a 1992 GMC van 2500. I have replaced the plugs, the plug wires, distributor cap and rotor all to no availe.


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Try replacing the knock sinser

Posted on Jan 02, 2009

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95 chevy 5.7 4x4 has new oil tune up engine pinging when cold worse when hot

sounds like a spark knock. I would set the timing on the engine and if it is ok try some higher octane fuel in the engine or mix some low and high octane gas about 50/50 and see if that helps the condition. If not move the engine timing ahead about 5 degrees. You don't want to move it to far or else the engine will be hard to turn over and start.

Jan 01, 2014 | Chevrolet 1995-1997 Chevy 3500 Truck...


To properly diagnose your overheating problem we need to rule out some things....

To properly diagnose your overheating problem we need to rule out some things.

First: Is there enough coolant/antifreeze in the radiator? Don't just look inside the plastic overflow bottle, but remove the radiator cap (when the engine is cold) and look inside the radiator. You should be able to physically see the fluid level if it is at its proper level.

Most cars and trucks will hold 1 1/2-2 gallons of coolant and water mixture. If you have to add more than a pint of fluid you should have the cooling system pressure tested for a leak. If you see any obvious fluid loss on the ground or in the engine compartment, you should also have the system tested for leaks.

Second: If no coolant leak or low fluid level is present, then determine when the overheating complaint occurs. If the engine overheats while at a stop or idle only: Most front wheel drive cars use an electric cooling fan motor located in front or behind the radiator.

The function of the cooling fan is to improve airflow across the radiator at stops and low speeds. The fan is controlled by sensors that regulate the engine temperature and additional load that might be placed on the engine.

The air conditioning compressor will require the cooling fan to operate at idle as long as the compressor is on. A quick way to check the cooling fan operation is to turn on the air conditioner. The cooling fan should come on with the air conditioner compressor.

Some cars will have two electric fans, one is for the radiator and the other is the air conditioner condenser fan. Usually the radiator fan is closer to the middle of the radiator. The radiator fan is responsible for engine cooling, and the condenser fan is responsible for increasing air conditioning efficiency at idle and low speed.

If your vehicle does not have an electric cooling fan on the radiator it will have a belt driven fan blade and fan clutch. This fan should be pulling a large amount of warm to hot air across the radiator onto the engine.

What you want to determine with either fan situation is that there is ample airflow across the radiator at idle. The radiator is the primary heat exchange for the engine, and airflow is crucial.

What if the engine overheats while at high speeds on the freeway?
Again, airflow and coolant circulation are crucial. At 55 MPH we can assume you have ample airflow across the radiator, so proper antifreeze circulation is the thing to inspect. I compare overheating at 55MPH to jogging with a sock in your mouth.

The faster and longer you jog, the more air you are going to require, and with a sock in your mouth you are going to have to breath extra hard to maintain the proper amount of air to keep you going. At 55MPH the water pump is pumping a large amount of hot antifreeze throughout the cooling system.

If there is a restriction in the system like a kinked radiator hose, a restricted radiator, or a stuck thermostat, it will produce the same affect as the sock in the mouth scenario.

Rust and water calcification can accumulate in the radiator and drastically reduce the flow of coolant at high speeds. Removing the radiator from the vehicle for disassembly and cleaning or radiator replacement are the only two real cures for a clogged radiator.

Using a can of "radiator flush" additive might help as preventive maintenance, but will probably just be a waste of time and money trying to correct a restricted radiator.

Hope this helps, best regards.

on Dec 03, 2009 | Vehicle Security Systems

1 Answer

Cummins fault codes 3216-9 error code

That code reads:
1: Abnormal update rate
2:Missing signal from NOx sensor
3: Loss of communication from NOx sensor ECU and Engine Control Module (ECM).

Hope this points you in the right direction. Good luck!!

Oct 19, 2013 | Camper Rv Motorhome Dual Co & Lp Gas...

1 Answer

What is the low psi for the air conditioning on a Ford V10

Generally speaking, with outside air temp at 80 degrees, and the engine at idle speed, the low side should be around 35psi. High side would be between 200 and 250 psi.

Jul 07, 2013 | Camper Rv Motorhome Dual Co & Lp Gas...

1 Answer

I reeplaced the fuel pump, fuel filter, and fuel pressure regulator. thinking that was the problem! But was told that the alarm might be the problem so i pressed the alarm twic and the truck started but...

You must put the alarm on a valet mode to see if the alarm is causing this problem
To enter or exit Valet Mode
1. Turn the ignition on
2. Turn the ignition off
3. Press and release the valet switch within 10 seconds
The status Led will light solidly if you are entering valet mode, and it will go out if you are exiting valet mode.
To enter or exit Valet Mode using the transmitter:
1. Open any vehicle door.
2. Press and realese lock and unlock buttons at the same time
3. Press and realese Aux button
4. Press and realese the lock and unlock button at the same time again
The status led will light solidly if you are entering Valet Mode and it will go out if you are exiting Valet Mode
Now when in Valet Mode try to start the engine, if the problem persist the alarm has nothing to do with it

Jan 11, 2011 | Viper 350 HV ESP Security System 350HV ...

1 Answer

1997 chevy 1500 4x2 with the 4l60e transmission

it could be the torque convertor. this is a device that connects the engine to the transmission. It can also be the on board computer if you have one.

If you have an onboard computer I suggest you get a diagnostic done. If your dont have one (more than likely) have a look at the torque convertor. Other than that I'd suggest you have a transmission specialiest look at it.

Also verify its wired up correctly or the connectors arent damaged. Like neutralising switch, gear shifter cable an over drive / econ mode etc.

Feb 27, 2010 | Chevrolet 1995-1997 Chevy 1500 Truck...

2 Answers

97 Chevy Truck starts and idles rough and then shuts down

Sounds like you're loading up with fuel. I'd check the fuel pressure regulator. Some engines are set up with a regulator inside the intake plenum, which requires plenum removal.

Oct 01, 2009 | Chevrolet 1995-1997 Chevy 1500 Truck...

1 Answer

1997 k1500 chevy 4x4 5.7

You have to check when the engine is stopped if it is missing spark or fuel because the engine is stopped for lack of spark or fuel to be able to verify that a better diagnosis. Thank you

Aug 01, 2009 | Chevrolet 1995-1997 Chevy 1500 Truck...

2 Answers

Alero Jerking while accelerating

Have your plugs, coil housing, and coils checked...sounds like your engine is missing due to fouled plugs or a bad coil/coil housing

Feb 03, 2009 | Bulldog Security Bulldog Remote Starter &...

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