Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi, My name is ***** ***** for the delay.
I will do my best to assist you
you replaced the crank sensor on the side of the engne block?
you did list..i am just making sure
other than the ignition module and the crank sensor,there isnt much to break down with heat like this other than the ecm[computer] itself
the crank sensor made no change?
sorry,my internet went down
you problem sounds as if you have a bad crank sensor...but
sense you have replaced it and the ignition module..i would think your problem is the ecm[computer]
there isnt anything else left
you may want to try one more crank sensor,it is possible to get a bad new one
let me know how it gos
ok,,,stand by,i will opt out,maybe one of the other guys has a better idea of what is going on
different expert here.
That fuel pressure is too low. It has to be at least 45 psi to run right.
When it wont start, give it a shot of starting fluid and if it starts with that, this will be a fuel supply issue.
Let me know
Thanks, ***** ***** only start briefly with the starting fluid.
When the pump is cool it can make more pressure and when the little pump motor gets hot it slows down and cant make enough pressure. It only takes a few PSI to low, and the injectors cant open unless it has at least 45 psi. So you need to concentrate on that area. Check the wiring at the pump and make sure it has 12 volts and a GOOD ground when it wont start. A lot of times that connector where the pump plugs into gets a bit corroded and doesnt let enough power go thru it, OR the ground wire has a bad connection where it comes out of the harness and goes to ground.
Yes, it is VERY common to get a bad pump right out of the box. especially if you bought it from autozone, advance, orilleys, etc...you really need to get one from the dealer. I know they are more money but well worth it because you dont have to keep changing it!
You cant really go off the starting fluid only does it 50% of the time because there is no way to accuratly measure how much gets sprayed. BUT 40 PSI is not enough so thats why i keep going back to the source.
Hi, my specs as i am looking at them right now and not going off the top of my head is 40 is the lowest on the range of 40-47
Regardless that is low on the scale and will drop lower with engine speed because the pump always turns at the same speed.
You have tried to see it it hits on starting fluid havent you? Thats when it wont start. That right there will tell you if its fuel or ignition related
Are you checking for spark at the plugs when it wont start?