Author Topic: Engine dies  (Read 4034 times)

Offline 123 pugsy

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Engine dies
« on: March 22, 2006, 09:26:00 PM »
Engine was surging(but still running) on my truck.Took off the undersized muffler that was causing way to much back pressure.Now it runs on high idle until I kick off the automatic choke then stalls.



Pugsy

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76 C10 LWB
TPI 350

Offline Lt.Del

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Engine dies
« Reply #1 on: March 23, 2006, 09:23:00 AM »
Since nobody has replied to this yet, i'll take a stab at it.  You probably checked the obvious; idle set screw adjustment, throttle return spring, etc.  It really sounds like a bad vacuum problem.  You sure your carb to intake gasket has no air leaks?  Carefully spray some wd40 or starter fluid around all gaskets.  You sure your emissions hoses are attached correclty?

This is obvious stuff but you may wanna recheck it.

If all this stuff checks out, I would think the carb is the culprit.  Is the carb brand new? May be a defect.

SgtDel  


Offline 123 pugsy

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Re: Engine dies
« Reply #2 on: March 23, 2006, 12:07:00 PM »
When you say sprat wd40 around it ,what exactly do you mean?

Pugsy
76 C10 LWB
TPI 350

Offline roundedline

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Re: Engine dies
« Reply #3 on: March 23, 2006, 12:20:00 PM »
spray WD40 around the base of the carb to see if the idle changes any.  If it does, you have a vacuum leak.

Chris Lucas
www.73-87chevytrucks.com
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Jimmy 2WD Project


Offline 123 pugsy

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Re: Engine dies
« Reply #4 on: March 23, 2006, 07:58:00 PM »
I'll check that out,thanks guys.

Pugsy
76 C10 LWB
TPI 350

ccb

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Re: Engine dies
« Reply #5 on: March 23, 2006, 07:59:00 PM »
Sounds like the EGR is bad. I would do the regular checks for vaccum leaks. if you spray wd it will be suck in to a leaking area and the motor will run rough. and there will be the leak. Can do the same thing with water.

Craig  


Offline Lt.Del

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Re: Engine dies
« Reply #6 on: March 23, 2006, 09:29:00 PM »
Sorry pugsy, I forgot that part about spraying it around the gaskets to see if the rpms go up.  Heck, I don't guess you have squeaks in your gaskets.  I guess i should proof read my replies.

Are you sure your timing is absolutely correct?  You have an older type motor in your truck, you can play around w/ the timing to find your best marks.  Could the timing chain been put on wrong (ie: lining up the timing gears of cam and crank).  One notch off will really ruin your day.

Any of these would cause it not to idle but would still run at high rpms.

Just throwing some things out there.

SgtDel

George Mason sweeet 16.  Yeah, baay beee.



 


Offline 123 pugsy

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Re: Engine dies
« Reply #7 on: March 24, 2006, 05:08:00 AM »
Timing chain marks are lined up dead on.Timing was good before I played with the exhaust system.I'll check the timing again and for vacuum leaks.I've ordered a rebuild kit for the carb (Edelbrock 600 cfm),,should get it in about a week.

Thanks for the input.

Pugsy

Pugsy
76 C10 LWB
TPI 350

Offline 123 pugsy

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Re: Engine dies
« Reply #8 on: April 01, 2006, 01:12:00 PM »
Phew! Rebuilt the carb and she's running like a clock.

Pugsy
76 C10 LWB
TPI 350

Offline Lt.Del

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Re: Engine dies
« Reply #9 on: April 01, 2006, 07:47:00 PM »
Well, pugsy, for such a nice truck, i am so glad it is running well mechanically.  I hope my replies helped...
Quote:
If all this stuff checks out, I would think the carb is the culprit. Is the carb brand new? May be a defect.


Just don't drive it too much....it is a beautiful truck.

SgtDel

GMU lost...final 4 aint bad.


Offline 123 pugsy

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Re: Engine dies
« Reply #10 on: April 02, 2006, 05:20:00 PM »
Your replies are always appreciated ,Sarge. Yea,the carb was new a few years ago,but sitting around in a dusty garage didn't help it too much.





Pugsy
76 C10 LWB
TPI 350

ccb

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Re: Engine dies
« Reply #11 on: April 03, 2006, 11:15:00 AM »
WOW. Thats a dirty carb, well glad you got it running good its a great looking truck. can't wait to see it finished.

Craig