Well. Here we go. I have a 90 f150 with a 300 i6 (bricknose from I’ve seen in a couple posts). Had her about a year and a half, a little over maybe. Only recently starting actually getting into the problems it has (some were already there, some I probably caused). Anywho, the current issue I really wanna get fixed atm is the vacuum line routing issue I recently had to deal with. I’ve looked at some posts a couple weeks ago when I tried to deal with it, ended up just winging it for half the lines. This issue came up was I decided to delete the air/smog pump. Yes, I’ve read some things saying it’s probably a dumb idea deleting it. But I thought, “wHy NoT tRy It?” Tomorrow I’m gonna deal with trying to reroute the serp belt cause I hollowed the smog pump, because trying to bypass it, the belt runs right next to the lower alt bolt and would shred the belt. Yesterday it locked up, so I’m trying something to just get rid of it all together and throw the pump in the dumpster. Any advice on the vacuum lines would be appreciated very much. I had an idling issue where it would run great, idle like crap. Or idle great and run like crap. Fixed it but now has issues when I crank it up it’ll shut right off and takes a few tries. (I let it crank and maintain an idle on its own)

 

Btw there’s a lot of problems with this truck. Not only mechanical but electrical, and cosmetic.

 

A little update. I rerouted the serp belt to this pattern where everything still turns the way it needs to, and there’s no change to how it runs. Good sign on that.

 

I am still having problems with the vacuum system. I tried putting a one way check valve on the line to the egr valve hoping that would possibly do something for the crank and idle first start up. It did not a darn thing. The issue at hand is that on the vacuum tree off the intake, I had one of the “holes” unplugged to where it would let air into it and the truck runs perfect. I plug it back in the idle strains and it wants to shut off when in park. I also still have the soup can hooked back because when I initially deleted the smog pump I took that out as well and it either runs like crap, idles great, or runs great and idles like crap. Plugged it back into the vacuum system pretty much how it was before and it’s kind of in-between where it runs good isles good when one of holes on the vacuum tree is unplugged but like I said prior I plug it up cause it ain’t supposed to be in bone it idles like crap and runs great. Really need some advice or some help with it cause I’m tired of chasing this problem. (Also on the smog pump, I did cut that line leading to it from the exhaust and plugged that hose up with bolt and a couple worm clamps. So I know that couldn’t be an issue.)