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#1 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Suddenly running like crap, where to start.
Hey guys,
Been a while, been busy with work and have been ignoring my truck ![]() Now it will start but doesn't want to stay running when cold and gives little pops in the exhaust when giving it a little gas. Haven't had much time to dive in deep, but checked the timing and it was a little off what I had set it at so re-set it and though I had it... nope. pulled the fuel filter and bypassed it, and seem to be getting spark at all cylinders. What I did notice is that when I pull the air filter and either choke it 80-90% or cover the intake with my hands the idle comes up and it runs smooth. Maybe too much or too little fuel? Or a leak somewhere in the intake manifold? What would cause that? Putting a mini starter in tomorrow, and fixing this issue. Where wold you guys start? Also it has an electric fuel pump and I haven't had a chance to check fuel pressure. ![]()
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#2 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,863
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Re: Suddenly running like crap, where to start.
Maybe one of the rubber vacuum line plugs on the carb?
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#3 |
Registered User
Join Date: Sep 2010
Location: British Columbia
Posts: 484
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Re: Suddenly running like crap, where to start.
Im with CG on starting with the carb. Check for any fuel leaks through the needle and seat as well, I had a similar problem which ended up just being a small gas leak.
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Trevor "You already said spite" |
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#4 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,734
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Re: Suddenly running like crap, where to start.
Sounds like it is sucking air from somewhere. Carb gasket or a vacuum line?
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#5 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Suddenly running like crap, where to start.
Well, I found one problem but not sure it was it. I guess my fuel filter exploded inside and was running a bunch of crap through the lines. I pulled out the filter and bypassed it, pulled the screen out of my edelbrock and it had a bunch of clear plastic crap and some small metal shavings. Started it up and its doing the same thing as before, so its either now pushed that crap past the screen and its in my carb, or there is a vacuum leak somewhere.
The vacuum to my crankcase, hei and brake booster all seem fine and my ported port is plugged. So its either the carb gasked, or intake gasket or there is crap in my carb. How hard are the edelbrock 1406 carbs to clean? Anyone know of a sticky or a manual on cleaning them? Crap, lots of work for me tomorrow...
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#6 |
Registered User
![]() Join Date: Aug 2010
Location: Jersey shore
Posts: 115
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Re: Suddenly running like crap, where to start.
Aloha
I am running an Edelbrock 1406 carb with a 1" riser on my 350 it does the same thing, from time to time, I find a safe place to pull over and back out the Idle screws and then back in and the problem goes away. I have two fuel filters in line but some how a bit of rust gets by the filter, both filters have reddish looking substance in them. I pulled the fuel pick up and it has a bit of rust on it, so I have a feeling the rust is in the carb and getting stuck in the idle circuit because when I back out the idle screws the problem goes away. Looks like a new fuel sending unit is in the future. The carb is easy to clean out, just remove the two screws on the top sides of the carb, be careful not to bend the metering pins, then remove the springs they fall back into place when you put it back together. Then take out the screws holding the top of the carb out and you will see the floats they remove very easy clean out your bowls and put it back together the way you took it apart. I went to my local speedshop and bought a rebuild kit and it had an exploded view of the carb and all the parts you need to rebuild it. The carb also has torx bits inside holding the fuels squirters in place if you choose to rebuild it, I used the gasket and the new acc pump fixings, I bet it just has some junk in the jets as they are on the bottom of the fuel bowls. Hope this helps Aloha Marty Last edited by jcis4me; 04-15-2011 at 02:48 AM. |
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#7 |
Registered User
![]() Join Date: Aug 2010
Location: Jersey shore
Posts: 115
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Re: Suddenly running like crap, where to start.
Last edited by jcis4me; 04-15-2011 at 02:52 AM. |
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#8 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Suddenly running like crap, where to start.
The idle circuit was clogged got it all fixed up, thanks guys!
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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