Blazer Problems

[kipman]

Owned four Deuce trucks, this is my first cucv, when it sets for a day, it is hard to start like it will loose the prime, any ideas?

 

[beaubeau]

It sounds like the glo plugs may not work. I know some 6.2 were known not to start too well. I just got my first and I am luck it goes well, so far!! Make sure both batts. are fully charged. That is the worst thing for 6.2, is to have LOW batts. Raises heck on starters and glo plugs. Phil

 

[mangus580]

Start by troubleshooting the glow plugs (search, I have described how plenty of times)

then, check to you have no fuel/air leaks in the fuel system.

 

[BobM]

Be sure and check each glowplug seperately. I once had a 6.2 that I bought with all "new" glowplugs. I tested the circuit and it showed good. after several expensive days, I finally checked each glowplug. One was good and seven had been burned out by some idiot "testing" them before he installed them!

 

[jag7720]

Owned four Deuce trucks, this is my first cucv, when it sets for a day, it is hard to start like it will loose the prime, any ideas?

Is it sitting on a slope with the tail down? Mine does that.. Someone told me that there was an issue with the fuel pump losing prime and the new ones fixed the issue. I have not replaced mine as I am putting a Walbro in when I install my WVO system.

 

[CCATLETT1984]

RE: Re: Blazer Problems

The factory lift pumps on the side of the engine didnt have a check-ball to prevent back flow, the ones that you can get at the parts store do have a check-ball built-in so they wont let the fuel flow back to the tank.

 

[hobie237]

RE: Re: Blazer Problems

I'm having a similar issue, mine will also sometimes start and then die. I know my fast idle switch is busted, and I'm going to be troubleshooting the glow plugs as well.

 

[CCATLETT1984]

RE: Re: Blazer Problems

if your fast idle switch is not working, also check the cold-advance switch (would have a affect on starting for sure)

 

[hobie237]

RE: Re: Blazer Problems

Thanks for the info, I'm going to be pulling up the shop manual and looking it up.

Does anyone know whether the glows stay on for a time after starting? If they do, then they're still somewhat suspect, if they don't, then I can be reasonably well assured it's a fuel system problem.

Thanks.

 

[CCATLETT1984]

mangus may jump in and correct me on this (its been a long time since i had the controller hooked up), but iirc the plugs are cycled on a few times after startup. this has nothing to do with the engine running, its solely for the purpose of reducing the white smoke when starting cold.

 

[hobie237]

Ok, that means that I can be reasonably well assured it's a fuel problem. Since the lift pump is new, and the injection pump seems in good order, the fast idle and cold start advance switches seem to be where to look.

Now I just gotta find 'em.

Thanks.

 

[hobie237]

Ok, I found the fast idle relay- AutoZone P/N MR82 for $12, but I can't find a "cold advance" switch listed anywhere.

The real question is whether I can just fake these with manual switches.