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Z71 means that the truck came factory with offroad performance suspension
Without engine mods....a performance chip, dual exhaust with high flow cats and good mufflers, K & N air filter. Without digging into the engine that's about it.
They started Z71 off road in 1990
a throttle body spacer will help some, as will certain types of exhaust but a performance chip is the biggest thing you can do to improve horsepower
how do u adjust the camber on a 1990 Z71
YOU CAN"T. Because of the computer system in the 93 is set up ONLY to operate the 4L60E transmission.
1990 Chevy 1/2 tons were available with a 4.3L V6, 5.0 V8, 5.7 V8, 7.4 V8, and a 6.2 diesel. Pretty sure the Z71's could have any of those engines. the Z71's have a 5.7 350 vortec. the regular 1990 models that just have the 4wheel drive in them and not the Z71 package have a regular 305. the heavy duty trucks then have a 7.4 454. but as far as the Z71, i have a 1998 Z71 and all my buddies have Z71's and i have not yet ran into a Z71 that didnt have a 5.7 vortec 350 the z71 only referred to the performance package also available in 2 wheel drive the k and v series are both 4x4 the k and r are both engine series of the 5.7 my "90 has the 5.7 Liter 350 but its not a vortec .I've seen carberated versions turbo and throttle body fuel injected 4.3, 5.0, 5.7 , 7.4 gas and 6.2 and 6.5 diesel engines all on 1/2 ton z 71s take a look in the junk yard they are very popular there second only to ford
yes the true z71's are 4x4 but people put the z71 decals on there standard 2wd trucks because the z71 is the most popular Chevy truck
you could start with a different prom chip for the engine computer.or add on a new k and n air filter for a slight pick up.rebuild engine with high performance heads.bore out .030 over for pistons,different crankshaft.or just put a little better cam in truck for quick pick me up hp.
700r4
Why does my heater control lights flash on an off on my 1990 Z71
There is no fuel shut-off switch on GM vehicles.