loose wire identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

berch 69GMC · 03-10-2015, 01:28 PM

While looking into possible qjet issues due to lack of power, i found this yellow wire dangling behind driver's valve cover. I have the truck about three months and I have thought it lacked power from the start. It has 350 from a 78 camaro, 4 barrel carb, standard intake. Sometimes it stumbles from idle, or cruising at 30mph if I step on it it almost stahls. I have read dozens of scenarios from search, checked for vac leaks to no avail. Hoping this yellow wire is the answer. Thoughts?

cooperhw · 03-10-2015, 01:36 PM

I am going to guess or vote for one of the wires that used to go to the coil that has been replaced by the hei unit.

**FirstOwner69** · 03-10-2015, 02:05 PM

Quote:

Originally Posted by cooperhw

i am going to guess or vote for one of the wires that used to go to the coil that has been replaced by the hei unit.

x2

**leddzepp** · 03-10-2015, 02:07 PM

X3

**67 cst swb** · 03-10-2015, 03:11 PM

x4
Just check with a test light to be sure its not hot/live.
A stumble usually indicates a momentary rich or lean situation, so I believe your issue is carb related. Assuming of coarse that the weights in the distributor and the vacuum advance are both working properly.

03-10-2015, 01:28 PM	#1
berch 69GMC Registered User Join Date: Jan 2015 Location: Boynton bch, FL Posts: 187	loose wire identification While looking into possible qjet issues due to lack of power, i found this yellow wire dangling behind driver's valve cover. I have the truck about three months and I have thought it lacked power from the start. It has 350 from a 78 camaro, 4 barrel carb, standard intake. Sometimes it stumbles from idle, or cruising at 30mph if I step on it it almost stahls. I have read dozens of scenarios from search, checked for vac leaks to no avail. Hoping this yellow wire is the answer. Thoughts? Attached Images

03-10-2015, 01:36 PM	#2
cooperhw Registered User Join Date: Oct 2014 Location: Mesa AZ (Near Phoenix) Posts: 2,302	Re: loose wire identification I am going to guess or vote for one of the wires that used to go to the coil that has been replaced by the hei unit. __________________ "Life is too short to drive a boring vehicle". Later, Wayne

03-10-2015, 02:07 PM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: loose wire identification X3 __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

03-10-2015, 03:11 PM	#5
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Re: loose wire identification x4 Just check with a test light to be sure its not hot/live. A stumble usually indicates a momentary rich or lean situation, so I believe your issue is carb related. Assuming of coarse that the weights in the distributor and the vacuum advance are both working properly. __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White



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