I may have to replace the cpi vortec engine in my 93 s10 blazer. It seems the tbi vortecs are easier to find but can I pull the tbi off and put the cpi intake on. From what I have read in s10 forum it is only compatible with the 93 to 95 years engines.
The CPI intake will fit on any pre-96 motor or even newer if you switch to the pre-96 heads. The place where you run into issues is when trying to put a TBI intake on the later countershaft motors, since all TBI intakes are not clearanced on the bottom to clear the shaft, only the later ones are.
What about how it works with the harness? i have a 4.3 tbi 5speed S10 pickup but ive got a 4.3 cpi auto blazer i could take the cpi motor out of and match it the the 5speeed? is that doable? or am i goin to run into issure with the harness and how it all hooks up
You will probably have to rearrange the wiring harness caused by different locations of the knock sensor and temperature sender. GM moved the sensors around on the 1987-1995 TBI (OBD I) and CPI (OBD II) engines in an attempt to obtain more accurate readings. The 1992-1995 CPI (OBD II ) engines are equipped with a crank position sensor.
You can visually compare the sensor location on the TBI engine to the sensor locations on the CPI engine.