little research on 1990-1995 chevy 350 motor

[Jeepwm69]

Originally Posted by manimal

But if you run Vortec heads, you will need a special intake if you plan on keeping the TBI. GM sells the intake, it's like $400!!, OR you could do an Edelbrock carb intake and use an adapter for the TBI, but you wont be able to have EGR if you need to pass emissions. The only way for that is the GM intake and a driver side exhaust maniifold from a 96-up 5.7 Vortec for the external egr tube.

If you delete the EGR won't your check engine light stay on all the time?

[manimal]

I 'THINK' it can be tuned out...not sure though

[Mr_Rich]

It really depends on whether you're talking OBDI or OBDII. I think you're discussing the case of OBDI where the EGR valve is either open or closed. If you block the EGR port and leave the electrical connection I think it might not cause a code. OBDII is more complicated where the EGR is progressive and has various states of open/ closed operation as I understand it. I think some people have deleted it in the ECM where they don't live in inspection areas.

[Kudzupatch]

Originally Posted by Jeepwm69

If you delete the EGR won't your check engine light stay on all the time?

Yup. You need to work on the programing to delete it and burn a new chip.