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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: cali6shooter on January 27, 2015, 08:44:02 pm

Title: 1980 c 10
Post by: cali6shooter on January 27, 2015, 08:44:02 pm

Can't seem to get timing correct also don't know if that is causing the dieseling . but I have 250 inline 6 4.1 and just got brand new 2 barrel carb.  tried adjusting timing don't know if its right but retard or advance never heard the ping but under load and horrible acceleration it shakes not to bad but only in low rpm range. lacking power under load and using a metric munge ton of fuel any ideas why? also it clears up once i reach 25 mph

Title: Re: 1980 c 10
Post by: Irish_Alley on January 28, 2015, 01:06:22 am

is this all the time or just when hot/cold?

Title: Re: 1980 c 10
Post by: Irish_Alley on January 28, 2015, 01:47:47 am

timing should be 10° with engine warm with Distributor vacuum hose disconnected & plugged, (if you can safety do)Transmission in drive (parking brake engaged) and about 650 rpms

Title: Re: 1980 c 10
Post by: cali6shooter on January 28, 2015, 12:40:21 pm

Parking brake is not working at the moment  I have a lil dwell on the side of the dist I am not sure if that is the one I need to plug

Title: Re: 1980 c 10
Post by: cali6shooter on January 28, 2015, 12:45:49 pm

And we hit it with a timing gun and got it to 8° btdc so basically what your saying it will will run better at 10° btdc

Title: Re: 1980 c 10
Post by: Irish_Alley on January 28, 2015, 04:15:29 pm

8° is ok and its good for a California truck but 10° she should run better. dont worry about putting it in gear most dont due to the risk of the truck moving.

Title: Re: 1980 c 10
Post by: 1979cheyenne on January 31, 2015, 06:08:48 am

Google vacuum diagram for that year engine and make sure lines are hooked up, my 350s timing was being funky like that, then I found my vacuum leaks and it was solved after. Also is your choke adjusted?

Title: Re: 1980 c 10
Post by: 1979cheyenne on January 31, 2015, 06:09:15 am

Sorry if I'm not much help just my ideas haha

Title: Re: 1980 c 10
Post by: cali6shooter on February 02, 2015, 01:12:43 am

Well don't have choke wire hooked up it got fried because the old carb was so garbage the metal was broken ordered new carb has tab but haven't fix burnt wire

Title: Re: 1980 c 10
Post by: cali6shooter on February 02, 2015, 01:15:14 am

Its all good any thing helps

Title: Re: 1980 c 10
Post by: 1979cheyenne on February 02, 2015, 07:03:52 am

Has it been burnt and non functional the whole entire time the truck has had hot starting problems? Your going to probably solve your problem with a fresh adjusted carb and choke in my opinion but you can guess so much over the Internet haha 

Title: Re: 1980 c 10
Post by: cali6shooter on February 03, 2015, 12:41:34 am

I am taking it to the Chevy man for a front to back run through mostly to adjust and tune carb check if distributor gear is worn or not  also valves  maybe a little off need to get 4 new shocks 2 new coils up front 2 new tires out back and a new bench seat would be nice

Title: Re: 1980 c 10
Post by: cali6shooter on February 03, 2015, 12:42:55 am

Yea choked was messed up like that when I bought it...after got new carb hooked up the wire and the choke light lit up on dash didn't seem to do anything engine wise though