I have a 1990 Chevy K1500 my motor went out was a 350 tbi and bought a brand new crate motor from GM it's a 1997 350 vortec we got the intake to make it where my throttle body is on it. It has no balls just falls on its face. Need help really bad.
I have a 1990 Chevy K1500 my motor went out was a 350 tbi and bought a brand new crate motor from GM it's a 1997 350 vortec we got the intake to make it where my throttle body is on it. It has no balls just falls on its face. Need help really bad.
Are wanting to learn how to burn your own Performance Chip?
dave w
It is a steep learning curve to "Tune" a chip. Knowing the engine specs is not enough information to burn a performance chip. Myself and other members here use TunerPro RT to "Tune" a chip.
The basic "Tune" process goes something like this:
Burn a chip based on the engine specs.
Use TunerPro RT to collect data logs.
Crunch the data log for rich / lean fuel conditions, spark knock, and other basic engine parameters.
Burn another chip, data log ... crunch the data log ... rinse and repeat until tuned.
The best performance chips are "Built" not Bought.
dave w
So me tune a chip myself?
Your best bet might be to buy either an emulator from Moates or a DynamicEFI conversion and learn to tune it yourself. There are a few members here who have tuned Vortec engines and could give you a timing table that work fairly well. Then, you just need to work on the fuel. You can probably get about 75% of the way there without a wideband O2 sensor but eventually you have to install one to do the wide open throttle tuning.
But to begin with, you will first likely either need more fuel pressure or larger injectors to provide enough fuel for that engine. So you could swap in a TPI fuel pump and a new spring in the regulator to get the pressure up to around 16-18psi. You could try the spring first but it's doubtful the stock pump can keep up to the fuel demands at a higher pressure.
advance timing to 10 degree and turn fuel pressure up it will run good . I have a 1994 gmc and dune the same thing .
Advancing timing and bumping fuel pressure is just a bandaid. It usually will work but a tune will do ten times better on reliability and performance. A moates Autoprom is like $300 and chips are $5-$10 and reusable. You can't buy a good PCM or Tuner for that price anywhere. People are willing to help you get it tuned well if you are willing to meet them halfway. Read the NewB posts and stickies. It seems really hard at first but it gets easier, you gotta make the leap though.
my bandaid will hall ass with no problem and no service engine light on
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