85 60 full desmog, sniper, & tuned headers - questions and progress (10 Viewers)

[brownjeans]

I have the vac line coming out of the intake with a man a fre smog delete going to the PCV valve
I have the distributor advance going to the port specified by Holley on the throttle body. I have the vacuum from the passenger side of the air filter going to the distributor.
Lastly the vacuum for the brake booster is in the stock location on the rear of the intake manifold with the other smaller tube on that fitting capped off.
I’ve also got the AC Delco charcoal canister installed but my truck isn’t near me so I can’t remember exactly how I plumbed that in but if you search for this here you will find some common solutions.
All other lines to the air filter housing and intake manifold are capped off.

Also, where do you have your o2 sensor mounted?

I have the PCV same as you. Charcoal canister - one tube to hard line that goes to fuel tank, another tube to the hard line the wraps around the back of the engine on the firewall and then to manifold vacuum where the brake booster used to be (other thing capped like you). Brake booster to the sniper brake vacuum port. Distributor - the hole in the cap is run to a T to join the canister tube to the manifold. Standard vac advance to sniper advance port. High altitude advance capped. All air cleaner ports are capped.

O2 sensor - I have the man-a-fre tuned headers and Y pipe. I put an O2 bung on the Y pipe about 8 inches below the merge on the top part of the pipe to keep it from being hit by a rock.

I reset my sniper and went through the wizard again. I set the engine size to 230 this time. Mild cam. 730 target idle. Coil.

Cold starts fine and idle is at ~1200 and all stats are good. After a bit the idle drops and the AFR turns red (high number) and it stalls unless I press the gas pedal to keep the RPMs up.

 

[DrRock]

I have the PCV same as you. Charcoal canister - one tube to hard line that goes to fuel tank, another tube to the hard line the wraps around the back of the engine on the firewall and then to manifold vacuum where the brake booster used to be (other thing capped like you). Brake booster to the sniper brake vacuum port. Distributor - the hole in the cap is run to a T to join the canister tube to the manifold. Standard vac advance to sniper advance port. High altitude advance capped. All air cleaner ports are capped.

O2 sensor - I have the man-a-fre tuned headers and Y pipe. I put an O2 bung on the Y pipe about 8 inches below the merge on the top part of the pipe to keep it from being hit by a rock.

I reset my sniper and went through the wizard again. I set the engine size to 230 this time. Mild cam. 730 target idle. Coil.

Cold starts fine and idle is at ~1200 and all stats are good. After a bit the idle drops and the AFR turns red (high number) and it stalls unless I press the gas pedal to keep the RPMs up.

Hmmm, what altitude do you live at? It should compensate for that but maybe in your early stages of getting it running the o2 sensor got clogged. I would take it out and inspect it and if there is a lot of carbon buildup you can burn that off with a propane torch. Are you able to get a vacuum reading? Sounds like you are really close.

 

[brownjeans]

Hmmm, what altitude do you live at? It should compensate for that but maybe in your early stages of getting it running the o2 sensor got clogged. I would take it out and inspect it and if there is a lot of carbon buildup you can burn that off with a propane torch. Are you able to get a vacuum reading? Sounds like you are really close.

I live at around 4300 feet (just outside Salt Lake City). Because I don't have an exhaust, I haven't run it more than a few minutes - like five. Not even sure it's run long enough to get up to temp. Only a drive around the block and a few mins of idle. The two mile drive to the muffler shop today will be the longest I've run it.
Wonder if I should start with something simple like ensuring the battery terminals are clean and have good contact and the fuel pump ground has good contact. Or maybe just drive it on the freeway for a bit after I get the exhaust done to give it time to learn?

What do you do with all the vestigal electrical connectors from the smog delete? Cover every open connector with finger cots and/or FlexTape?

 

[Skreddy]

What’s your MAP reading? Also, IAC position at that idle.

 

[brownjeans]

What’s your MAP reading? Also, IAC position at that idle.

Good questions - which idle do you mean? Below 1200 RPMs it stalls almost immediately so it's hard to get any readings.
Truck is at the muffler shop today. I'll take a look when I get it back.