toyota rav4 wil not fire changed crank sensor and cam sensor and ecu relays it wil spark somtimes and try to hit

2001 toyota rav4 trys to hit from time to time its had crank sensor replaced cam sensor replaced ecu replace relays checkd and replaced if any one has any ideas i would be thankful traded for it thouth could fix for my wife to drive previous owner said lost power b for when in a hard pul so even cheka te timing

Is your check engine light on while trying to start it? No check engine light means no power to ECM and it won't start. If not check your fuses and the efi main relay. These relays are known to become loose and give similar issues.

yeah the check engine light stays on whil cranking also swapd relays

Just for giggles double check your crank position sensor electrical connections. Also are you absolutely sure that the coils and spark plugs are not firing? Might want to remove one, ground plug on metal and have someone turn engine over as you watch for spark.

Just thinking that you might have something else going on.

it has independent coils and have a spark tester hookd up thought it was fixd a bit ago firing rapidly then stopd again

Ok yes it has individual coils. Ok your crank position sensor sends signal to ecu and ecu sends signal to coils for them to fire. Starting to wonder if you might have a loose ground somewhere causing your issues. Or some other loose connection in this loop.

How to check the crank sensor is working??

I have spark but no fuel

I'm having the same issue. Replaced crank sensor not it starts but won't stay running and isn't kicking any codes. You can check the crank sensor two ways. Either use your code reader and change to rpm. Should get a reading when you try to turn it over. Otherwise, if you don't have a meter, watch the tachometer when you turn the car over. IF your tach moves, which it should, up to about 1, then your sensor is ok. If it doesn't move at all. then sensor bad. Shop online too, partsgeek is $27, O'Reillys $168.

I had the same problem I changed everything and still no start or spark finally I changed the igniter and there it was the whole time this little part caused all that trouble hope this helps

Guru8PHT8, what do you mean the ignitor? I have the same problem. Do you mean ignition switch? My crank sensor has ground but no power.

Did we get a answer on ignitor? I'm having same problems though mine started on but only ran for a few seconds then back to not starting.