No, open. We already know you can make "too much" boost so blocking it off would just continue to show that problem...we are trying to figure out if there is sufficient flow through the wastegate hole to eliminate boost when open.
So what if it's the mbc? Could I test that by running the vac hose from the pressure side of the turbo to the lower fitting on the waste gate, eliminating any kind of boost controller aside from the internal spring in the waste gate?
So I by passed the boost controller and ran around little, it stopped at 12lbs. There is still a small problem with intermittenly cutting during acceleration. Maybe too much fuel? Strange thing with the fuel pressure gauge is when I first start the car it reads only around 20psi, after a few miles of driving it will climb to 40psi and a little later upwards of 45psi. I remember the ideal fuel pressure should be closer to 40 so I turned that back down, but it didn't go back down. I'm off to the Kirban website to see what I can see about this problem.
And I still haven't installed the Walboro pump. Factory pump as of now. Would that make it fill pressure slowly like that? I'll try and get this pump installed before I spend the money on a new gauge and see what that does.
I can't think of any reason it would take a while to build pressure at idle and still be able to supply enough fuel under load. That's why I said I'd suspect the gauge first. No need to buy a new gauge for the rail, just check it with a diagnostic gauge.
Got the tank down today and pulled the pump, ready to install the new Walboro I bought. When I get the bracket out the friggin pump in there is a Walboro! It's not got the same numbers on it, but is deffinitley a Walboro aftermarket of some size. I went ahead and put the new pump I had in and put it all back together, changed the in line fuel filter out as well.
I thought the '85's had an intank pump as well as an inline pump. If the previous owner put in the Walboro did they most likely remove the inline pump? The new 255 pump I put in today well be enough on it's own, right?
And the idle is still rough, and at full throttle acceleration in 2nd and 3rd gears the car cuts out, like loss of spark or fuel, or both. Can't wait to get the new ECU in and some datalogging to see what's going on in there!
Walbro makes all sorts of fuel pumps including stock replacement units you can get at the parts store. All you need to do to know whether the previous owner removed the inline pump is to look under your car. If it's there, they didn't remove it .
A single 255 high pressure pump will be sufficient.
We never messed with the pump. Now the previous previous owner, I coulnd tell you. If you have any more questions about work what was previously done, dont hesitate to soot me a p.m. If i cant answer it i can talk to my brother and we will be glad to help you any way we can.
So the turbo center section now spins within the exhaust housing... megagay. I tried tightening down the bolts more but it still moves. If I grab the inlet side "horn" and pull a little the whold thing will rock back and forth inside the exhaust housing, or twist if I so desire!