Just fired 355 for first time..........

[dirtwarrior17]

Ok I just fired the beast 5 min ago. It idles real rough and i know it's missing cause i don't have a timing light yet but i have to give it throttle to keep it runnin. Could 02 sensor and vaccuum lines be part of the problem? im still waitin on wire for my o2 sensor so i ran it without the o2 sensor. I tweaked the timing and it got better but not timed. could somebody tell me if an 02 sensor will affect how it runs, i know it will but not how much.. or if the o2 sensor has more affect on a high hp motor. It idles real rough and i know it's missing cause i don't have a timing light yet but i have to give it throttle to keep it runnin.

Also i looked in the manual and couldn't find out wut other sensor is not hooked up. It sits on the back of the intake manifold and has a 2 prong plug. Manual says it is a coolant temp sensor but i got one in the front. Is there 2 coolant temp sensors on an 88 k5?

I will have pics in couple weaks and maybe a soundbyte.

Oh yeah y can't i post anywhere else besides garage?
Says i need to have somebody activate account? How?

 

[beater_k20]

oil pressure sensor?

 

[dirtwarrior17]

no.... close but no. oil pressure sensor is to the right of the distributor. this one sits in the manifold and is on the left rear corner if you are looking at it from the front.

 

[dirtwarrior17]

Also have 2 left over vacuum lines, one because the vavle covers have a breather instead of a crankshaft valve and i don't know what the last one does manual doesn't say. Tbi is a holley 670 cfm with 89 pph injectors.

Egr vaccuum, egr main, and canister vacuum are hooked up... whats else is left?

 

[fatbob]

one because the vavle covers have a breather instead of a crankshaft valve

That crankshaft valve has me stumped

 

[dirtwarrior17]

think its a pcv valve. dunno i don't have my manual on me. on a stock tbi itd go from the valve cover to the tbi......

So does the o2 have alot to do with how smooth a motor runs that or is it the vacuum lines?

 

[k20]

O2 doesnt have an effect till the motor warms up. I 4get the exact temp, but until then the O2 sensor wont affect it.

 

[dirtwarrior17]

I just looked it up... 600 degrees f. Must be all timing.