Question about 2000 BMW 3 Series

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Ok i have a mazda b1800, the engine is cranking and the sparkplugs are firing correctly, i know the fuel pump may not be working correctly but i have put a good squirt of petrol into the carbi. But the problem is it wont fire :( have cleaned all the plugs twice brought new fuel, new oil but just wont fire up :(

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Pull one plug wire insert screw driver intothe spark plug boot getthe screw driver 1/4 inch away from a good ground and where it won't move. crank engine over if yo see a blue spark then you have another problem if it does nor spark yo have a bad coil or contact set.

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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1999 Mazda Miata, engine will not run, sparkplugs has got fire, fuel pump is working good, and it cranks but will not start. What seems to be the problem?


check the regulator on the fuel rain to make sure there is fuel getting to the injectors. also check the relays in the engine relay box on is for the injectors to turn on, there is also a fuse.

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I HAVE 2000 OLDSMOBILE ALERO THAT FIRES BUT WANT CRANK. IVE CHANGED THE COIL PACKS IGNITION SWITCH CRANK POSITION SENSOR AND I HAVE A NEW FUEL PUMP WHAT COULD BE THE PROBLEM?


pull one sparkplug and crank the engine to see if you are getting spark. then check to see if there is fuel getting to the injectors, without fuel and spark at the right time an engine won't run

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New fuel pump won't prime. No fuel from gas tank to engie. Lines are clear.


The pump works without priming anything. If the tank is vented, and you have fuel in the tank, and the pump is installed correctly, it should pump fuel out.
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Will crank and run fine when engine is cold go for drive come back wont start, new battery1 will turn over just like no fire is getting through1


could be a number of possible faults.1/crank sensor not working when hot,trace this and pour cold water on it(dont do this if it is not by crank pulley as water isnt good for modules etc) and retry.2/sparkplugs worn,but usually they would fault more on cold start.3/fuel pump cuts out when run,try wacking tank from underneath and retry.though I would concentrate on nil spark caused by a faulty ignition module or crank sensor.
Next time it fails to start.pull off a sparkplug lead,make a quick test plug with an old(but working)sparkplug.pull the side wire away from the center electrode 5mm and insert into plug lead.earth ground the plug on its thread against metal on the engine.crank and check for spark visually,don't be tempted to hold the plug while cranking.if nil spark we will have to test further which is faulty sensor.if it sparks ok we will need to test for fuel.
testing for fuel is easy.
when it fails,unclip air filter housing,while engine is being cranked,spray an aerosol based carburettor cleaner into air duct to engine,it should start and run while spraying and stop when you stop spraying if fuel delivery is the fault.fuel pump will then need testing/replacing.
be careful not to spray onto ignition or any areas of spark

Feb 11, 2011 | 1994 Lexus LS 400

1 Answer

V6 hard to start.replaced coils sparkplugs . check relays and they check ok put new crank senser in still wont start. no dash lights work and there no fuel pressure on rail.and the motor cranks good and...


I think you've identified your own problem. In your description of the problem, you indicate "no fuel pressure on rail".....

First things first, try replacing the fuel filter. If this doesn't do the trick, make sure the fuel pump is actually pumping (you indicated that you hot wired it with a 12 volt DC supply and it ran). Running is one thing....pumping fuel another. To properly identify issue you need to know the cranking fuel pump pressure. If you can get it to start it would also be a very good idea to check out the fuel pressure regulator.

When you turn the key to the "ON" position (don't crank it, just to to the position where it would run) do you hear a few seconds worth of pump motor activity?

If it tried to start when you introduced fuel into the breather, then I think it's safe to say you have some sort of fuel delivery issue.

Jan 30, 2011 | 1999 Chevrolet Malibu

1 Answer

Traveling at an estimated speed of 70 mph, car lost acceleration. Slowed to a stop. Ignition turns over, battery initiates, no 'fire' to engine. Fuel pump not the problem...


No fire? There probably is fire, but out of time or some liquid (water, oil, PS fluid, etc.) got into the distributor cap and the rotor fire is shorting (sparking) to ground through the liquid.
Check spark anyway, pull a plug cable and set down on metal part of engine ground. Ahve someone crank starter while you look for spark from end of sparkplug cable to ground.
Let us know...

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1 Answer

Ford explorer no fuel coming through


disconnect fuel filter on flow side turn key on if it spits fuel you should check the sparkplugs and injectors for propper spray pattern

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98 mazda 2300 truck wont fire or start


check your coil and see if you have fire.if you have fire then you need to check your fuel pressure. i have a mazda 2600i that did the same thing and it was the coil .did your truck back fire when you shout it off?. if it did iam pretty sure its your coil.note there is a module in side the dis very few people know about this but they are not notted for going bad good luck

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1 Answer

Do you know where or if a 2000 Mazda 626 has a fuel pump cut off switch. According to the parts store it doesn't have a fuel pump relay. I have replaced the fuel pump and the car still won't crank. I am...


Hello, I am going to make a few assumptions here. The vehicle has an electric fuel pump and you replaced it. The vehicle has fuel injection. The engine is actually cranking, just not starting, when you say "car still won't crank". You are getting fire to the spark plugs at the plug ends. You checked the fuel pump for power at the pump. No power, then you back traced the wire to the fuse block and checked the fuse to see if it was blown. If the fuse is good back trace the power to the ignition switch and/or ECM for power. You have power at the pump, check the ground and make sure it is connected properly. Will the pump run when someone turns the key on? Pump runs, check fuel manifold for pressure. No pressure, check the fuel filter for blockage, or replace it. Fuel pump doesn't run, new replacement pump is defective. There is usually some type of control module for the fuel pump on fuel injected vehicles. Good Luck, RAC

Mar 24, 2009 | 2000 Mazda 626

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