Vacuum advance??

[coldair]

I'm having trouble with my vacuum advance on my AMC 258 i6 / 4.2l . Set the timing hooked line back up gose all the way full advance. I have the stock distributor with a howell fuel injection. Thinking about replacing with a hei

 

[Posi]

Are you on full or ported vacuum? Howell's directions say full, but I'm using ported to let the ecm have more control.

 

[Torxhead]

Howell's instruction sheet does call out using ported vacuum:Go to the vacuum schematic,Support :: Installation Manuals - Howell Engine Developments, Inc.

 

[Posi]

Didn't notice the OP has a 6 cylinder
Howell recommends full vacuum on V8 AMC 304 and 360 engines.

http://howellefi.com/pdfs/AMC_V8_TBI_install_instructions-5-19-05update.pdf

 

[73CJ]

Go for the HEI. If you went for the Howell don't back off now. You won't regret it. Better starts, Easily waterproofed.

 

[coldair]

It's been a week sense I've looked at my vac lines I'll have to check them again. Posi I'm really leaning that way on the dizzy.

 

[coldair]

Go for the HEI. If you went for the Howell don't back off now. You won't regret it. Better starts, Easily waterproofed.

Ordered my HEI tonight