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

engine cuts in and out accelerating

Old 05-28-2017, 11:47 PM
New Member
Thread Starter
Join Date: May 2017
Posts: 5
young99 is on a distinguished road
Default engine cuts in and out accelerating

I have a 1977 K5 Blazer and having a little issue I am trying to sort out.

When driving and getting into about 3rd gear, sometimes the engine will cut in and out int and out. If i let off the gas the truck will still idle but if I gas it slowly do the same thing.

I have took apart the carburetor (original carb) replaced it with new parts from a rebuild kit. Replaced the mechanical fuel pump with a new one. I dropped the tank and took a look inside looked fine, I removed the sending unit sock and added a visible inline filter in the engine bay.

I am not too knowledge able about carburetors and guess this is still where my issue is. I put a vacuum gauge to one of the ports and gets constant 16 when at idle. I do notice that the secondary barrels are hard to open by hand i dunno if this is normal or not.

any other things I could check?
Related Topics
Thread Starter
Last Post
2nd Gen S-series (1995-2005) Tech
04-26-2013 04:14 AM
2nd Gen S-series (1995-2005) Tech
10-13-2010 11:10 PM
1st Gen S-series (1983-1994) Tech
06-30-2009 02:35 PM
Engine & Transmission
03-24-2009 08:33 AM
General Tech Help
06-21-2006 10:01 PM

Thread Tools
Search this Thread
Quick Reply: engine cuts in and out accelerating

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.