Full Size K5 (1969-1991) GMT415 (1992-1994) Tech Discuss any and all full size K5 general tech topics here.

87 Blazers Starts, Runs, then Dies

Old 07-29-2009, 10:00 PM
New Member
Thread Starter
Join Date: Jun 2009
Posts: 78
mafiaboy01 is on a distinguished road
Question 87 Blazers Starts, Runs, then Dies

Hi, I have an 87 Blazer, K5, Diesel. When I go to start the car everything goes accordingly, the glow plugs go out and I crank. I starts quite easily runs for about 3-5 seconds the dies. After that I have to crank quite a bit, it seems as if there is no fuel in the engine because there is no combusting almost like I just ran out of fuel and am trying to get it back to the engine.

This is putting a big strain on the starter and I have broken the support bolt twice I feel really bad cranking for so long but there is no other way to start it and I need to get to school. The only thing that I can think of is that there is a leak because the long the car is sitting(overnight) the harder it is to start.

I would appreciate any help, I would like to get this fixed, so I don't have to get under the car with another extractor to get the darn bold out from the starter mount.

Thanks a lot.

Old 07-30-2009, 04:48 PM
oisinirish's Avatar
Super Member
Join Date: Jan 2009
Location: Austin, TX.
Posts: 1,174
oisinirish is an unknown quantity at this point

Sounds to me like you're getting air somewhere in the fuel system. Try following the lines and looking for wet spots. Check the injectors as well they can let air into the system if loose or faulty. I'm not sure but is there a backflow preventer in the fuel system or does the pump serve this purpose. On another note if it hasn't been done in a while I'd get a good diesel treatment, you may have an algae problem as well.
Changed the fuel fuel filter?
Old 08-02-2009, 10:00 PM
bandidolenny's Avatar
Super Member
Join Date: Jan 2009
Location: Kerrville, Texas
Posts: 1,349
bandidolenny is on a distinguished road

Have you recently changed or drained the water separator?
Try cracking open the supply line to the injector pump and crank it over for a bit in order to purge any air out of the fuel system.
That's what we used to do back in the day when we would accidentally run out of fuel.
Also, change the fuel filter at the back of the intake.
Old 08-03-2009, 09:11 AM
New Member
Thread Starter
Join Date: Jun 2009
Posts: 78
mafiaboy01 is on a distinguished road

Thanks for the help, I have changed the fuel filter and released the water(there was quite a bit) I haven't started the car this morning so I'll let you know if this helped.

I was also going to go buy some biocide for the fuel because before I got the car it has been sitting outside for about 5 years with minimum use. SO maybe that will help out.
Old 08-03-2009, 05:48 PM
reelbroke2's Avatar
Junior Member
Join Date: Jun 2009
Location: Wilmington,North Carolina
Posts: 355
reelbroke2 is on a distinguished road

Drain the water from the fuel tank or you will defeat the fuel filter change. make sure all the water is out of the seperator as said..If you have a primer pump make sure it's tight and not leaking. Air in the fuel will not let it run either..you can bleed the air by loosening 1 injector at a time while cranking the engine over or by using the primer if equipped.
Old 08-05-2009, 06:29 AM
Beginning Member
Join Date: Aug 2009
Location: Tulsa, Ok
Posts: 21
SWATPARAMEDIC is on a distinguished road

Sounnds like it could be fuel injector(s) or fuel pump. I'm not sure what the Blazer has, but my Dodge has a lift pump and injector pump. I had to replace both pumps and it never tripped the check engine light but threw codes on a code reader.
Related Topics
Thread Starter
Last Post
Engine & Transmission
04-18-2015 03:02 PM
2nd Gen S-series (1995-2005) Tech
08-07-2014 04:29 AM
Engine & Transmission
04-23-2011 11:08 AM
Full Size K5 (1969-1991) GMT415 (1992-1994) Tech
03-09-2011 08:55 PM

Thread Tools
Search this Thread
Quick Reply: 87 Blazers Starts, Runs, then Dies

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.