Question about Cars & Trucks
What causes it to loose fuel prime while sitting overnight?
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Posted on Jan 02, 2017
On top of the transfer case is a vacuum switch with 3 vacuum lines connected to it. This switch controls when vacuum is applied to the vacuum actuator. This switch can fail partly and allow fluid from the transfer case to be sucked up into the vacuum lines and anything connected to them as well. When you replaced the actuator before, did you notice any oily fluid inside of it?
Posted on Dec 23, 2008
SOURCE: 1998 olds bravada 4.3 v6
there is a fuel pressure regulator on the back of your injectors, change it, its a 13 dollar part, after you do that, buy a fuel pressure guage, hook up the pressure guage, turn the key to on possition, prime the like a couple times like you would do with a new pump, check the pressure it should be any where from 58 LBS to 62 lbs of pressure in the like, if its any lower the 58, you need to change your pump, with out 58 lbs of pressure the injectors dont get the correct pressure in each purge, hence the crank with no start.. you seem to know enought about pressure n stuff like that so u should get it
Posted on Mar 26, 2009
no fuel shut off switch on pickups that i know of possibly bad fuel pump find your red bypass wire at relay to test pump
Posted on Mar 29, 2009
On many vehicles with electronic fuel injection, the pump is located in the fueltank and the fuel actually cools it, chronic low fuel levels will cause issues here on an older pump BUT look elsewhere for thr PRIMARY cause... plugged fuel filters, bad pressure regulators and injectors. You havent mentione that it has affected engine performance so look to the fuelpath... filters and lines... suspect your source of fuel as the root cause for plugged lines and filters. You could also simply have a bad pump... it happens in any case the vehicle IS 9 years old and if the cause is found to be other than the pump itself, replace the pump. it is an electric motor driven high pressure pump. The Motor is what is overheating, and this causes the windings on electric motors to break down... which will result in premature failure. replace it while it is running and not when it dies with you in traffic or away from home and end up having to pay for a tow
Posted on Apr 13, 2009
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