Engine Type

[ZDaniels]

I need help! I need to find out what type of 4.3L I have in my 1995 GMC Sonoma. Is there a lable or something I can get the info off? Everytime I go to the parts store they ask me if it is this kind or this kind and I have no clue. If you can help me I would greatly appreciate it.

Thank you,

Zack

[Sparky2263]

8th number of the VIN. W is a CPI and Z is a TBI.

[ZDaniels]

Thank you Sparky. Another quick question. What does CPI and TBI mean?

[rat]

Thank you Sparky. Another quick question. What does CPI and TBI mean?
Here are pics: http://www.s10planet.com/forum/showthread.php?t=876

TBI: Throttle Body Injection. This style injection has 2 injectors above the throttle body. Fuel pressure is a carb like 13ish psi.

CPI: Central Port Injection This has a centraly mounted injector that has 6 tubes that lead to popets at the ports. This engine has more power than the tbi's. Fuel pressure is up around 60psi or so.

[ZDaniels]

Thank you for the explination Rat.