85 Blazer K5 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

monster88 · 01-04-2004, 12:23 AM

my first chevy...im starting the tune up process this weekend. its an 85 blazer k5, 350, 3:73 gears, dual exhaust, flowmasters, (no headers yet) 35 's, 3 in. suspension lift, 2 in body lift, 4 bbl...besides a few minor electrical problems (window motors, power locks, some gauges) the truck is really sound. what recomendations do you have for some good tune up parts. which are the best plugs, wires, etc....what easy performance mods can i do. i realize its not set up for speed, im basically looking for just good all around performance and reliability. its my daily driver. right now i getiing probably 8 miles to a gallon...

any help is appreciated. thanks

Russell · 01-04-2004, 01:19 AM

Betcha that you've got at least one vac leak somewhere, your timing is off, and you have plug wires that are shorting out...

Those will all lower your economy... Just get decent plug cables and plugs, the guys at the counter of the parts shop will be able to get you the right ones for your truck. Also check your filter, and your PCV filter, they're usually pretty gummed up. Don't play with the carb unless you know someone else has been goofing with it, they don't usually fall out of tune on their own if they are nice and clean

crackajacka · 01-04-2004, 03:13 AM

yea get some new ac delco spark plugs, some good plug wires(had some that were yellow, but now ive got some Moroso Blue Max Spiral Core ones) go buy some soft vaccum tubing and some hard if u want 2. shake the pcv valve, air filter. get a vaccum gauge and play with the carb (q-jets require a 5 dollar tool to adjust the air fuel mixture) check the timing. run some b12 in the next tank of gas. spray the inside of the carb with some carb cleaner i like b12(read on the bottle usualy says use while running) thats all i can think of right now lol.... o and the vaccum gauge will tell ya if youve got major leaks.

Prerunner1982 · 01-04-2004, 12:57 PM

i run NGK plugs, and a decent set of 9mm wires.. also you might look into replacing the dist. cap and maybe rotor. good chance of vac leak. these things have way too many vac lines. as far as playing with the carb, you might read up alittle before trying it. or have someone help you. unless you have done it before. hard to get it to the shop if you cant get the truck to run after you messed with it.. ya know? you might also check trans filter and fluid... a dirty filter could cause the trans not to shift properly also cause poor fuel economy.

01-04-2004, 12:23 AM	#1
monster88 Registered User Join Date: Jun 2001 Location: Port St. Lucie, FL US Posts: 18	85 Blazer K5 my first chevy...im starting the tune up process this weekend. its an 85 blazer k5, 350, 3:73 gears, dual exhaust, flowmasters, (no headers yet) 35 's, 3 in. suspension lift, 2 in body lift, 4 bbl...besides a few minor electrical problems (window motors, power locks, some gauges) the truck is really sound. what recomendations do you have for some good tune up parts. which are the best plugs, wires, etc....what easy performance mods can i do. i realize its not set up for speed, im basically looking for just good all around performance and reliability. its my daily driver. right now i getiing probably 8 miles to a gallon... any help is appreciated. thanks __________________ 85 Blazer K5, 350- 4bbl 3:73 gears, 3 in sus. lift, 2 in body lift, 35's "While the Wicked stand confounded, call me with thy Saints surrounded" "Why dont you just sit there and bleed awhile, before you taste some real pain"

01-04-2004, 01:19 AM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Betcha that you've got at least one vac leak somewhere, your timing is off, and you have plug wires that are shorting out... Those will all lower your economy... Just get decent plug cables and plugs, the guys at the counter of the parts shop will be able to get you the right ones for your truck. Also check your filter, and your PCV filter, they're usually pretty gummed up. Don't play with the carb unless you know someone else has been goofing with it, they don't usually fall out of tune on their own if they are nice and clean __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

01-04-2004, 03:13 AM	#3
crackajacka Stylin Join Date: Sep 2001 Location: Tuttle, OK Posts: 620	yea get some new ac delco spark plugs, some good plug wires(had some that were yellow, but now ive got some Moroso Blue Max Spiral Core ones) go buy some soft vaccum tubing and some hard if u want 2. shake the pcv valve, air filter. get a vaccum gauge and play with the carb (q-jets require a 5 dollar tool to adjust the air fuel mixture) check the timing. run some b12 in the next tank of gas. spray the inside of the carb with some carb cleaner i like b12(read on the bottle usualy says use while running) thats all i can think of right now lol.... o and the vaccum gauge will tell ya if youve got major leaks. __________________ Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/

01-04-2004, 12:57 PM	#4
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	i run NGK plugs, and a decent set of 9mm wires.. also you might look into replacing the dist. cap and maybe rotor. good chance of vac leak. these things have way too many vac lines. as far as playing with the carb, you might read up alittle before trying it. or have someone help you. unless you have done it before. hard to get it to the shop if you cant get the truck to run after you messed with it.. ya know? you might also check trans filter and fluid... a dirty filter could cause the trans not to shift properly also cause poor fuel economy. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call Last edited by Prerunner1982; 01-04-2004 at 12:59 PM.



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