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Starts difficult - diagnostic test pointed problem to be knock sensor but tested ok. Checked electrical all ok.???

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Check for other cel codes, check the crank position sensor. check the ignition coil. check your fuel pressure.

Posted on Oct 14, 2013


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 2000 chevy venture doesnt start

Not the IAC, or MAF, or 02

Does the Van Crank over?
Have you checked the IGN Relays? 1,2,and 3?
How did the Battery test out?
Anything below 11.9v battery is dead.
So I suggest that you do not throw any more parts and check the battery again.

Posted on Jul 15, 2009

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1 Answer

Test knock sensor on 90 GMC truck

You need a full function scan tool to read the output of the knock sensor while you drive it under different throttle settings and loading. There is no real way to "bench" test the sensor. The reason is that the sensor is an output device called a "Piezo Electric" sensor, it vibrates a tiny ceramic disk during engine knock and sends out a low voltage signal to the engine control computer when a knock is detected, so in order for the output to be tested you need it working on a live engine..

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Check for short/ open circuit for knock sensor 52 code as checked by Auto Electrician

The knock sensor can't be tested out of the engine, you must run the engine and watch the signal return and then look up what is normal and decide if the sensor is defective.

Jun 25, 2016 | Cars & Trucks

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2000 5.3ltr silverado will not start

Which ECM / PCM fuse was burnt ? How did you check fuel pressure ? With a pressure gauge or just pushing the scrader valve an seeing fuel dribble out ? Pull a plug wire an see if there is spark .

Engine Cranks But Does Not Run

The Engine Cranks but Does Not Run diagnostic table assumes that the battery condition and the engine cranking speed are OK. If the battery condition and the cranking speed are not OK, refer to Diagnostic System Check - Engine Electrical in Engine Electrical for diagnosis. Make sure that there is adequate fuel in the fuel tanks.
Diagnostic Aids
• Check the duct work between the mass air flow (MAF) sensor and the throttle body for air leaks.
• A malfunctioning MAF sensor may cause a no start or a stall after start. If you suspect this, disconnect the MAF sensor. The powertrain control module (PCM) will default to the speed density in order to calculate the load and the air flow. If this corrects the condition and the connections are OK, replace the MAF sensor.
If the steps above check OK, refer to Symptoms .
Test Description.

The numbers below refer to the step numbers on the diagnostic table.
It may be necessary to connect a battery charger to the battery for this step. If the battery state of charge is low, the scan tool may reset during the cranking test.
This step tests the ignition relay for proper operation. The ignition relay supplies voltage to the injectors and the ignition coils. When the ignition relay is not operating properly, a no start condition occurs. If the test lamp does not illuminate, this indicates the ignition relay is not suppling a voltage to the fuses.
The crankshaft position (CKP) sensor is located above the starter.
The camshaft position (CMP) sensor is located at the rear of the engine behind the intake manifold.
The ignition feed circuit for the CMP and CKP sensors is internally connected within the PCM. A short to ground on either circuit will cause a no start condition.
The fuel cap may need to be removed in order to hear if the fuel pump is operating.
At this point the engine should start. Refer to Hard Start for further diagnosis.

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1 Answer

Do i have a knock sensor

Knock sensors usually are found on turbo charged engines. Have a diagnostics run on your car to pinpoint the problem.

Mar 25, 2014 | 1992 Nissan Maxima

2 Answers

Dodge stealth cranks no spark no check engine light. has fuel getting delivered to engine. checked all fuses all good. Ecu is good

Thanks for choosing FixYa and welcome to the site. There are a few things that you need to test and check. You need to check your plugs/coils, wires, distributor, coil packs, cam sensor and crank sensor. Check your timing belt/chain. Since there is no check engine light, you go in blind and you will have to check and test these parts, which some can be difficult. To perform the test, you will need a wiring schematic to test to see if any wires are without power. You will need to test these while the car is cranking. Check all electrical connectors and make sure all ground wires are grounded right. You need to check the wiring going from the parts listed to the ECU as well. You may be better off having your vehicle put on a diagnostic machine to pinpoint the cause. In most cases, it is electrical rather then the actual part.

Sep 06, 2011 | 1992 Dodge Stealth

1 Answer

Where can i find knock sensor on elantra 2009 2.0 litre engine and how to test it?

Here's a pic of its connector's location -- follow the harness and you'll find this sensor on the right hand side of the cylinder block below the intake manifold (14mm bolt attaches it to the block).

This sensor can only be checked, not tested. If you have a DTC set (i.e. P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor) the diagnostic performed by the engine computer is better than any bench test you could perform without an oscilliscope. It has a resistance you could check, but it wouldn't be revealing/absolute.


Feb 12, 2011 | Hyundai Elantra Cars & Trucks

1 Answer

Very difficult to start..cranking numerous times until the battery is too tired to crank engine again.diagnostic code 0304. everything checked from misfire on #4 cylinder,plugs,wires, I'm on the...

Ok, do you have a tach in the car? If so watch it while cranking. if it does not move you may have a crank sensor issue, test your fuel pressuer at the port. see if you are over 47lb, if so fuel pump is ok then, then take a test light and a paper clip, unplug one of your injectors, put paper clip into one end of the plug, hook test light to it, then put other end of test light ot the other wire, have someone turn the car over, if it blinks you have injector pulse, that should be all to it with the fuel system,

does it have spark? if you have fuel and spark, then you may be looking at a loss of compression, possible timing jump, bad head, bad rings,

i hope this helps you.

Oct 22, 2010 | 1997 Hyundai Accent

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Blinks 2 times pause then blinks 3 times. air bag light

This is air bag code 23, it refers to the safing sensor and/or diagnostic monitor. electrical diagnosis will be required for the circuit providing voltage to the monitor and the sensor to verify the point of failure, vehicle may require a sensor or you may have a corroded wire to or from the the sensor or monitor, I suggest getting the test proceedure and doing the test or have a qualified technician perform the test as air bags can be dangerous(& costly) when improper proceedures are used!

Mar 22, 2010 | 1996 Ford Bronco

1 Answer

2006 crv 2002 willnot start with turning key willstart with tow or short pushallparts of fuel (diesei)line cleaned pump&inj.test ok engine will turn when key is used key test ok test show lack of fuel...

hi if when engine starts and warms up it then runs ok ? then starts ok rest of day ? considering vehicles age/milage ? have you checked heater glow plugs ? you only need one glow plug to fail/ leak to earth on cyl head and this will knock out/ leak power to earth of all other g/plugs also consider the possibility that the engine coolant sensor ( not the temp sender) has gon faulty this sensor gives ecu signal to provide excess fuel for cold starting on cold starts and auto cuts off as coolant heats up? rather like using choke control on carbs years ago ? also diesels used to have excess fuel device on pumps on trucks in days gone by ? whick assisted in cold starting hope this info helps?

Feb 03, 2010 | 2006 Honda CR-V

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