Question about 1988 BMW 5 Series

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Car wont start after changing crank sensor

No pulsing from the spark plug wires

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  • 99 Answers

Check cam position sensor.

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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SOURCE: my car has power turns over but does not start, change the ecu

do a scann,obd2,crank sensor a common issue

Posted on Aug 16, 2009

  • 10 Answers

SOURCE: no start. i have gas, spark and injector pulse

yes it would due to timing if the sensors are bad the engine want start due to timing 

Posted on Sep 07, 2009

  • 437 Answers

SOURCE: cranks won't start. getting fuel and spark

replace fuel pump. For some shops it is part of the 60kmi maintenance sched. The fuel pressure has to be there for the motor to run. Replacing just the pump and not the entire sender unit is about a $80.00 job, diy. Get the pump online, you'll get the same thing for half the price of the local parts store. You'll be amazed at the crossover usages of one pump.

Posted on Jan 02, 2010

  • 437 Answers

SOURCE: 1988 325i. new head, plugs, wires, water pump,

That's it.

Posted on Jan 02, 2010

  • 248 Answers

SOURCE: why spark plugs flooded with petrol i check for

But u need to check the fuel pressure if this is ok u may has injectors leaking down..
Now if the fuel pressure is bad, than u may have a bad fuel pressure regulator.

Also u will need a service manual for ur car so that u can get the proper fuel pressure reading. Also it will tell u what tools r needed to do the job!

Posted on Jan 26, 2010

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2 Answers

97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start


Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

Nov 04, 2016 | Oldsmobile Cars & Trucks

1 Answer

Wont start. it has injector pulse but no spark


is there power and ground to the coils?

If there is injector pulse than the crank sensor has to be good. Injector pulse and spark are both calculated off from the signal from the crank sensor.

Checking for power and ground to the coils is a good place to start. If that checks out than either there is a wiring issue in between the PCM and the coils or possible the PCM has failed.

Nov 20, 2015 | 2001 Pontiac Firebird Trans Am

1 Answer

Will not start. Fuel pressure ok, new plugs and wires. Turns over, wont start. What to check next?


Check for spark at 1 or more plug wires. If no spark, possible crank sensor/computer/fuse/wiring. Check for injector pulse. Remove 1 injector harness and install test light between the two terminals of the harness and crank engine. Test light should flash if computer/wiring ok. Make sure check engine light comes on when key in on position for bulb check. If no light, look for blown ECM fuse/s

Oct 18, 2015 | 2004 Chevrolet Chevrolet Tahoe Z71

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96 tahoe turns over but wont start 1/2 tank of gas carbs clean gas gets to carb but i got no spark I just change the distributor' coil the MAP sensor new plugs and wires last November and really haven't...


Did you visually check for spark at the spark plugs, engine cranking? Does the dist rotor turn when you crank it? Did you use a gage and check correct fuel pressure? Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader.

If you have the spider fuel system, that system is noted for problems. No, the fuel system shouldn't cause a no spark. If no rpm signal, that will usually stop the injector pulse along with other issues.

Dec 12, 2014 | 1996 Chevrolet Tahoe

1 Answer

No spark on 03 dodge neon


There is voltage on all three wires because there is no ground, check with engine cranking. The two wires that go to computer are grounds for coils. You could probably use a noid lite to check for pulse, engine cranking. That should be safe, between primary voltage and one of the grounds. There several ways to visually check for a pulse. If your digital multimeter has a min/max setting, that should work. You could use an l.e.d. but you would have to use resistor.
You changed computer, was it new?

ignition coil-5iatbqqw4bcw3fkj1yoi3lr2-1-0.jpg

May 15, 2017 | 2003 Dodge Neon

1 Answer

The engine indicator on the dash wont stay lit before the start of the car, the engine turnsover but doesnt start


There is no simple answer, there are to many variables. If you have access to a scan tool, pulling the codes should help. Without them its back to old school hunt and peck method. At this point we need to narrow down the problem. You need to test for spark.
  1. Tag and disconnect the spark plug wires from the spark plugs.
  2. Remove the spark plugs and install the spark plug wires to each spark plug.
  3. Ground (do not hold spark plug) the spark plug; check if spark occurs while engine is being cranked.
Crank the engine for no more than 2 seconds at a time to prevent flooding the engine with gasoline.
If you have spark, You will want to make sure you have fuel injector pulse, along with fuel pressure. If you have spark ..simply spray some starting fluid in through the air filter and hold the gas pedal to the floor and crank it over while spraying. If it fires up, you know it is fuel related( fuel pump, regulator, or ECM if no injector pulse) . If you have no spark then look at ignition coil connection and trace through to the distributor( if equipped ). The crank shaft sensor has a tendency to fail on these as well. This should give you a few things to test and check to start you on your way to narrowing it down. If you have no spark then look at ignition coil connection for power and trace through to the distributor( if equipped ). If it is DIS( no distributor). It may be the Crank sensor or the ECU. The crank shaft sensor has a tendency to fail on these as well.
The ECU uses the signal sent from the Crank sensor to trigger the spark and fuel injectors. ( make certain you have checked all fuses)

Nov 14, 2010 | 2002 Mitsubishi Lancer

1 Answer

I was driving and my car died and wont restart. long cranks but wont turn over. I changed the battery still no start.I checked faults codes and got p0340. I changed the cam sensor and code went away. I...


Make sure battery has a full charge. Have a helper crank it, while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check fuel injector pulse.

Jun 26, 2017 | 2003 Chrysler PT Cruiser

1 Answer

02 Mitsubishi Galant, changed igniton but now wont start


There is no simple answer, there are to many variables. If you have access to a scan tool, pulling the codes should help. Without them its back to old school hunt and peck method. At this point we need to narrow down the problem. You need to test for spark.
  1. Tag and disconnect the spark plug wires from the spark plugs.
  2. Remove the spark plugs and install the spark plug wires to each spark plug.
  3. Ground (do not hold spark plug) the spark plug; check if spark occurs while engine is being cranked.
Crank the engine for no more than 2 seconds at a time to prevent flooding the engine with gasoline.
If you have spark, You will want to make sure you have fuel injector pulse, along with fuel pressure. If you have spark ..simply spray some starting fluid in through the air filter and hold the gas pedal to the floor and crank it over while spraying. If it fires up, you know it is fuel related( fuel pump, regulator, or ECM if no injector pulse) . If you have no spark then look at ignition coil connection and trace through to the distributor( if equipped ). The crank shaft sensor has a tendency to fail on these as well. This should give you a few things to test and check to start you on your way to narrowing it down. If you have no spark then look at ignition coil connection for power and trace through to the distributor( if equipped ). If it is DIS( no distributor). It may be the Crank sensor or the ECU. The crank shaft sensor has a tendency to fail on these as well.
The ECU uses the signal sent from the Crank sensor to trigger the spark and fuel injectors. ( make certain you have checked all fuses)

Jul 01, 2010 | 2002 Mitsubishi Galant

1 Answer

Test: car won't start


does it crank but not start or does it just click like dead battery or starter if it cranks check for spark and fuel pull spark plug wire and insert a screw driver and hold it close to an engine ground and have someone try to crank the engine is there a strong spark and use what is called a noid light it plugs into the plug for the injectors to see if the injectors are pulsing it should blink when you try too too start the engine if you have pulse and spark check for fuel pressure there should be a service port on the fuel rail that looks like a valve stem for a tire sort of youll need a fuel pressure tester if you had no spark or pulse at tthe injectors its most likely either the cam sensor crank sensor or the computor(pcm) if only no spark change the coil if that doesnt work you might need an ignition module but that requires more testing I cant explain here see a technician if no fuel pressure remove fuel filter drain and attemp to blow air through it if you cant its clogged replace and try vehicle if no start still feul pump is bad replace pump .

hope this helped

Jun 18, 2010 | 2001 Volkswagen Jetta TDI

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