postcar

I have a 1989 and today i put new injectors in it, somehow or another after i started it it ran ruff and wouldn't hardly run. Looked at everything all vacuum lines etc right then i noticed somehow or another i got the pledum tubes on the wrong sides, i got the heat tube on the drivers side and the blocked off one on the pass side. Did it hurt anything, do i just need to swap sides and be ok? Any help is thankful

Benny42

You probably didn't hurt anything. Just switch the parts back to right and report back. Good luck.

postcar

i googled 1989 corvette engine pics and i notice some have plenum with tube on left and none on right and then there is pics with it on the right side too...... Which is correct?

Benny42

All TPIs have the small tube on the right side. '89 & up don't have the tube on the left.
The left tube is for the cold start injector which was eliminated for '89+

Cliff Harris

One is for the EGR and the other is for the cold start injector. In 1989 the cold start injector was eliminated so that tube is not needed.

postcar

swapped them back started and runs ok but slow starting cranks for about 2 seconds before firing??

Benny42

This info is from my '89 Formula 350, not a Vette. My car cranked about 2 seconds before
starting for as long as i had it. No amount of tune up, wires, fuel pump, injectors, or
timing adjustment fixed it. Its an '89 thing, search around the board, you'll see.