The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

RThree · 03-27-2019, 11:56 PM

Hey guys I need some help... my 292 is running like crap. You can hear it here https://youtu.be/BLo_5nW8LGE

We tested it with a heat gun as it warmed up and it seemed that cylinder 5 and 6 are not firing. We then pulled the spark plugs wires for 5 and 6 as it was running and nothing changed confirming that they are not firing.

Cylinders 5 and 6 have 120psi and 135psi of compression respectively which seems goods, we have confirmed solid spark on each cyclnder and the mono jet carb has been rebuilds and adjusted and the other 4 cylinders are firing right along.... so we’re lost HELP!

Any suggestions?

03-27-2019, 11:56 PM	#75
RThree Registered User Join Date: Jun 2014 Location: Santa Rosa, CA Posts: 124	Re: '72 K/30 Longhorn Conversion Hey guys I need some help... my 292 is running like crap. You can hear it here https://youtu.be/BLo_5nW8LGE We tested it with a heat gun as it warmed up and it seemed that cylinder 5 and 6 are not firing. We then pulled the spark plugs wires for 5 and 6 as it was running and nothing changed confirming that they are not firing. Cylinders 5 and 6 have 120psi and 135psi of compression respectively which seems goods, we have confirmed solid spark on each cyclnder and the mono jet carb has been rebuilds and adjusted and the other 4 cylinders are firing right along.... so we’re lost HELP! Any suggestions? __________________ - 1972 K20 Longhorn, 4wd conversion. "TAWNKAA" Project. 292ci Inline 6 / '93 NV4500 / 32 spline 205 TC / Dana 60s front & back / rear Detroit Locker / 4.10 Gears / 35" BFG MT KM2 / 4" Tuff Country lift. "TAWNKAA"Build Thread http://67-72chevytrucks.com/vboard/s....php?p=6823933 - 1970 C10 Lonbed, 292ci Inline 6, 3 on the tree, stock.