A few days ago my blazer died while backing out of my driveway but immediately started back up. It died again later that day while pulling into a gas station. One day it sputtered while driving down the road. I changed the fuel filter and that didnt solve the problem (its never that simple). When I turn the key on I can hear the fuel pump humming and also did a fuel pressure check and its pumping 50 p.s.i. constantly so I eliminated the fuel pump. I'm not sure what to check for next. Any suggestions?
2007-09-11 18:07:07 · 7 answers · asked by Bark at the Moon 6 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
I own a shop, and a Blazer. I wouldn't rule out the pump just yet, as it may just be going out, and starting to fail. A problem like this one is always "hard" to find since it runs, and don't run, then runs again. In order to find the problem, it must be doing it when one looks for the reason. Go over the vacuum hoses, and look for: split where it plugs on, not fitting tight & sucking air, come off, hose rotten, and a collapsing hose from being spongy. May be the ignition module going out. The EGR valve may be going bad, as this is a common problem with these vehicles. Try this; with the engine at operating temprature, just floor the gas pedal, and let it go through the gears, then stop quickly. If it now dies in its tracks, you have a bad EGR. This will make the EGR work in a range its not used to, and if it is plugged up by carbon, it will stall the engine every time when you stop quickly. You don't have to get over about 50-60 mph, so its not like you are breaking the law. Also if you have a mass air flow sensor in the hose that goes to the throttle body, try tapping on it with a screwdriver and the engine running, if it quits, replace the sensor.
Glad to help out, Good Luck!!!
2007-09-12 01:09:26 · answer #1 · answered by Anonymous · 0⤊ 2⤋
I had a heck of a prob with a '65Electra, it would do the same thing. No rhyme or reason and finally traced it to a corroded gas line which was a rubber gas line between the gas tank and metal gas line that goes along the chassis.
A long shot but...
2007-09-15 17:55:21 · answer #2 · answered by Michael S 7 · 0⤊ 0⤋
the ninety 5' blazer had the technology a million vortecs that have been very companies to gas rigidity regulator failure, they could leek gas into the oil making it skinny and inflicting them to have no oil rigidity at a idle. in the adventure that your ECM selections up a low voltage sign from the oil presser sending unit it is going to close the gas pump off killing the engine this could be a protection function designed to save the engine interior the progression of a finished loss of oil rigidity
2016-10-04 10:23:15 · answer #3 · answered by Anonymous · 0⤊ 0⤋
On a truck forum that I am on, it sounds like carbon deposits are jamming up your EGR valve. That's just a shot in the dark though, but it seems quite common. You come across as mechanically sound, so maybe look into that area.
If it is indeed the case, I recommend ordering up an EGR mesh screen from the link below... if you can't find one local.
2007-09-11 18:17:34 · answer #4 · answered by Grammaton Cleric 4 · 0⤊ 2⤋
Along with fuel pressure you need to check volume, it can happen where pressure is fine but there is not sufficient volume. the spec. for that vehicle is 1 pint in 30 seconds, no less.
2007-09-11 18:14:11 · answer #5 · answered by catty427 2 · 1⤊ 1⤋
FILTER--did you do the fuel filter?? Go to a shop and let them do a new set of plugs and wires and all that goes with it--it probably needs it. can't do it alone--the computer may need to be reset--hey, stuff goes bad--that's life.
2007-09-11 18:13:59 · answer #6 · answered by fire_inur_eyes 7 · 0⤊ 2⤋
Have your computer scanned for codes at autozone or your mechanic.
2007-09-11 21:02:13 · answer #7 · answered by Johnny 4 · 0⤊ 2⤋