John1978s30

Thanks all for the replies, some good info in the thread that I didnt know. Update: The hiss was from the new IAC I installed to communicate with the new ECU. Vacuum system was sealed and good to roll. The vacuum source I had hooked to the MAP sensor was too weak to register with the new ecu (notice in the pic above it's pegged at 100). A speed shop noticed this and hooked it up to the brake booster instead. I toned the accel fuel dump way down (was AFR was way too rich) they did some config on the injectors and boom. Car is running solid and now a good daily driver w 50k original miles!

try a stud remover after soaking it in lube. I had to use it on many rusted bolts. note if the bolt breaks, you'll likely have to use a tap and die to rethred it. https://www.amazon.com/ARES-70016-Damaged-Extractor-Removes/dp/B01GKEBG9I/ref=sr_1_3?keywords=stud+remover&qid=1569280591&s=gateway&sr=8-3

hey gang, recently re-aquired my first car (78 z 2+2 manual). it ran a little choppy until I replace the air flow meter and ran great for a week, then choppy again. Since the AFM was from a junkyard in AZ, i again assumed that was the issue. ...Log story short - I decided to purchase the FAST EZ EFI system from z-car depot, also replace the exhaust manifold (rusted and cracked), powercoated the valve cover and intake manifold, deleted and plugged the egr...blah blah blah. Now, with everything installed and new ecu wiring harness and sensors, it idles great, all readings look fine <attached pic is warming up> Once it warms, if I touch the throttle, it wants to stall and I hear a small hiss. IF i hold throttle far enough to not stall, say 1400 rpm's, the Air Fuel ratio drops way too much.rather than increasing as it should i.e. 8 or less. fuel pump and pressure regulator are not that old. fuel clog?