lone73
Well-known member
This is not a cranking problem, the battery is about 18 months old and it turns over fine. Lately the car has gotten to where it needs several more revolutions during crannking before it will fire and sometimes when it does fire it acts like its not getting full fuel pressure- its like its half running and half cranking for a few revs then finally fires and runs. It runs ok after that. The car can be killed and then started up fine after that also. If it sets for an hour or more and then is started the above problem shows up.
I was thinking that the fuel pressure is low from a bad pump. Bought a fuel pressure tester from O'Reilly's about an hour ago and checked it out. When the key is just turned on the pressure comes up to about 46 psi while the pump is running (I can hear it running in my garage). when the pump shuts off the pressure drops back to about 44 psi and holds there, dropping back by about a pound every 5 minutes or so. This doesn't seem too bad to me but then I let the pressure off the tester ( by pressing a button on the side with a clear drain line leading into a catch cup) and after it drained the fuel out, about a 1/4 cup's worth, it started blowing a lot of air out of the system... for a good while, I would say about 2 minutes of air before the pressure bled off totally.
That didn't seem right to me at all. Anybody got any ideas about what is going on with this thing? Based on the above, is the problem fuel related or something else totally?
Check engine light is NOT on BTW...
Thanks
.
.
.
I was thinking that the fuel pressure is low from a bad pump. Bought a fuel pressure tester from O'Reilly's about an hour ago and checked it out. When the key is just turned on the pressure comes up to about 46 psi while the pump is running (I can hear it running in my garage). when the pump shuts off the pressure drops back to about 44 psi and holds there, dropping back by about a pound every 5 minutes or so. This doesn't seem too bad to me but then I let the pressure off the tester ( by pressing a button on the side with a clear drain line leading into a catch cup) and after it drained the fuel out, about a 1/4 cup's worth, it started blowing a lot of air out of the system... for a good while, I would say about 2 minutes of air before the pressure bled off totally.
That didn't seem right to me at all. Anybody got any ideas about what is going on with this thing? Based on the above, is the problem fuel related or something else totally?
Check engine light is NOT on BTW...
Thanks
.
.
.
