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Chevy Blazer Starting and Stalling Problems

324 messages,  Last post on Nov 14, 2009 at 8:20 AM

You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet Blazer, GMC Jimmy, SUV

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#1 of 324 305 V8 stalling after running for a bit...please help by cuman3242 Jun 13, 2006 (5:37 am)
I have a 1974 Blazer with a 305 in it, I just replaced spark plugs, cap, rotor, wires, fuel filter, some hoses and PCV valve. It starts up strong, runs fine for a bit - drive it around the neighborhood - then once I come to a stop it basically dies on me, sometimes it will start right back up again - sometimes it will just crank and crank.   What other things should I be looking at, fuel pump? Can a bad coil cause this??   I would appreciate any help, thank you. Replies to this message: tidester (Jun 13, 2006 10:15 am) repairdog (Jun 14, 2006 11:58 am)
#2 of 324 Re: 305 V8 stalling after running for a bit...please help [cuman3242] by tidester HOST Jun 13, 2006 (10:15 am)
Replying to: cuman3242 (Jun 13, 2006 5:37 am) I changed the title of this discussion to make it more general.   tidester, host
#3 of 324 Re: 305 V8 stalling after running for a bit...please help [cuman3242] by repairdog Jun 14, 2006 (11:58 am)
Replying to: cuman3242 (Jun 13, 2006 5:37 am) This is reaching back, but no computer and manual fuel pump with a carb. Float level and needle/seat would be one to look at - does this have an air idle solenoid on the carb? Isn't there a small brass filter in the carb base where the line screws in too. Fuel pressure should be checked (believe 9-11 lbs but check online to be sure). Coil could heat up and die as well as wiring to the key switch could be loose.
#4 of 324 having trouble with the furl system by bigjoe85 Jul 30, 2006 (8:58 pm)
I have an 01 blazer 4.3 vortec and Im having trouble I think with the fuel system. When I would pull up to a stop light and sit there longer than 5 min. it will cut off on me and and now its shutting off while im driving down the road. I have no problem starting it backup though. Fuel pump or possibly injectors? Replies to this message: repairdog (Jul 31, 2006 5:37 am) samm00 (Aug 21, 2006 3:32 pm) niteman18091 (Aug 21, 2006 4:01 pm) samm00 (Aug 21, 2006 5:14 pm) and 1 more... gb_stewart (Jul 20, 2008 3:10 pm) silversmoke (Jul 30, 2008 10:42 pm)
#6 of 324 Re: having trouble with the furl system [bigjoe85] by repairdog Jul 31, 2006 (5:37 am)
Replying to: bigjoe85 (Jul 30, 2006 8:58 pm) That or coil, sensor, MAF, vac leak, cap/rotor/wires/plugs etc - mileage? First when was the fuel filter changed - first place to look and its $15 ($75 with labor). Air filter not too dirty? Fuel system has a test port on the metal line that requires a special valve to connect and then ckeck the pressure. 60psi min with key on engine off (start pressure) and 54psi running. If those check out then on to electrical/sensors/etc. Any SES light on and codes?
#7 of 324 reply by bigjoe85 Aug 01, 2006 (7:21 pm)
well the milage is about 83,000 havent checked the fuel filter yet(where is that located by the way) air filter looks good and also can i go to a local parts store to have the lines checked? Replies to this message: repairdog (Aug 02, 2006 1:19 am)
#8 of 324 Re: reply [bigjoe85] by repairdog Aug 02, 2006 (1:19 am)
Replying to: bigjoe85 (Aug 01, 2006 7:21 pm) Fuel filter should be changed every 25-30k miles and is under the drivers seat area under the frame on the inside. Its always a pain to change up there - $10-15 part and about $50 labor. One end is quick connect squeeze tabs to release (after pressure released) and the other end requires 2 open end wrenches. Have to take the bolt out of the plastic holder also to get the filter out. Pressure test NOT normally done by auto stores but they may have a free reantal tester to use at home or take to a shop and they will do that and the filter plus analyze the problem so you don't throw too many parts at it.
#9 of 324 fuel sistem problem?? by jmojardin Aug 09, 2006 (11:51 am)
I'M DRIVING A 2001 GMC JIMMY V6 4.3L. LIKE 2 MONTHS AGO I NOTICE THE FUEL GAGE WAS NOT WORKING...I REPLACE THE FUEL PUMP ASSY. NOW THE GAGE IS OK BUT THE CAR CUTOFF AT ANY TIME,I REPLACE AGAIN THE FUEL PUMP, BUT THE PROBLEM PERSIST. THE VEHICLE SHUTDOWN WITHOUT PRIOR WARNING FOR NO REASON WHILE DRIVING OR AT COMPLETE STOP..I AM THINKING IF THERE IS ANY PROBLEM WITH THE FUEL FILTER, I NEVER REPLACED. ALREADY 75K MILES ON IT.IAM REALLY CONFUSE IF I HAVE TO REPLACE AGAIN THE FUEL PUMP FOR THIRD TIME. SOMEBODY SAY THERE MAY BE SOMETHING WRONG WITH THE THERMOSTAT. ANY IDEAS?? THANKS Replies to this message: repairdog (Aug 09, 2006 12:11 pm) gb_stewart (Jul 20, 2008 3:12 pm) silversmoke (Jul 30, 2008 10:45 pm)
#10 of 324 Re: fuel sistem problem?? [jmojardin] by repairdog Aug 09, 2006 (12:11 pm)
Replying to: jmojardin (Aug 09, 2006 11:51 am) First change the fuel filter a $15 part, then if problem still happens test the fuel pressure at the test port on the metal line at the top rear of the engine. Its a special tester and once you have it or get a shop to do it the pressure should be 54psi when running or alittle higher (but not lower than 53) and if there is a starting problem its 60psi with the key on engine off. Also check all connectinons at the top of the tank and there is a fuel pump relay in the fuse box under hood.

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