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Comments
90% of the time, the stalling issues will end up being a fuel pump.
The fuel pump is like any other electrical motor. Take the starter for example.
If you find the starter is burnt out, you can some times strike it with a small hammer or anything else with some weight, and you might get it to start again.
Now why none of the car companies will put a sensor on the fuel pump, is beyond me. It would actually be a simple thing to do and would stop alot of the heartache.
Something like this:
Key is put into ignition mode-No gas pressure? Send Error Code.
Key is put into ignition mode-No electric signal passing though? Error Code.
I can do this with simple programming to a microcontroller, yet none of the billion dollar car companies can add this feature into the system?
Now one other feature that could be very simple to intergrate into any vehicles system, The Code Read-Out onto a 0.50 cent LCD panel possibly on the fuse box, instead of having to take your broke down vehicle to any shop or car parts store to have it scanned.
Why don't they?
Because the car companies want you to pay top dollar for all of the repairs, the diagnostics and possibly get you back into the dealership to purchase a new vehicle.
FUEL PUMP PEOPLE, And prepare to pay out atleast $600.00 for a new one isf you vehicle is a 1998 or newer.
Runs great just wont start till 20 pounds of oil pressure.I dont hear the fuel pump at all when i turn the key over to try to prime it.Just have to crank it till it hits 20 pounds oil pressure then starts right up.It is quite annoying any help would be much appreciated thank you
You mentioned that you can not hear the pump when the key is turn on and that is a good indication that there is a problem with your fuel pump circuit (relay, wiring or fuse). try to get a wiring diagram for your fuel pump circuit through your local GMC dealer most of the time they will print it for nothing for you, that will help you out with your problem.
Hope this will help you out.
dagimsts
as far as starting it it will turn over twice then be running i replaced the mass air flow sensor.....very little help i have a job that starts in a week and i really need this truck running
so i dont have to borrow dads and listen to his crap..... oh it has a 4.3 L vortex v-six
my 04 blazer was running with battery pack on it to charge. whent back little wile after and it wasn'trunning. cantget it to start back up. has spark and gas. sounds like pressure being released after a few cranks but no egnition
New Question, I have a 2000 LT Chevy Blazer 4x4 4 door V6 4.3L engine. Yesterday was a rather warm day and I was driving on a freeway doing about 75 miles an hour and the vehicle lost power and stalled. I was able to get to the shoulder of the road and placed it in park. I checked the engine temp it was fine and so was oil pressure. I waited about 2 minutes and it started right back up and I was able to drive it home. Today the same thing happened again, this time on a side road slowing to a stop sign. Exact conditions. When I got home I checked my antifreeze res. and it was low not to bad though about 1/3 of a container of 50/50. I have been maintaining the vehicle and getting things repaired as I have the $$, I have just had the cooling fan replace and thermostat and just before that I had the intake manifold replaced. Can anyone please help me.
Software.( Engineer has Identified a concern with the PCM software. In high ambient temperature, the engine control management system may falsely retard the timing, Causing a noticeable loss of power or the engine will
shutoff). This is when you cycle the power by turning the switch off if would start right backup.They have had a fix for this since December 22 2005. Document ID # 05-06-04-077 it should cost you around a $110.00 to reflash your PCM