jvanen

Hey I have been constantly working on this problem of mine. At first I thought I had a boost leakage but ends up The popoff valve is what I am hearing. I am overboosting some how. I know that this car hasn't run right since the Alternator went sky high, taking the headlights with it and a few other electrical things. I'm wondering if it might have screwed up the computer. If you can get the car to start.... you have to keep it above 2k or it will straight away die. Now I have an 83zxt computer in it and I have a 81 zxt computer laying here, Will the 81zxt computer work with the 83 zxt wiring? Or will I just screw something else up? thanks for all the help

Hey I replaced those 3 little vacum lines just to make sure...Still no difference. When many of these problems started happening is after my Alternator went. It managed to blowout my headlights and the small fuse by the voltage regualtor. the car hasn't run right since. I replaced the headlights and put a new alt in and I thought things were all ok. But then this overboosting problem came up and she is running 10 mpg nbw. What about that little vacum selenoid deal by the AFM? I'm starting to Zero in on it. Doesn't it have something to do with the Idle of the car? perhaps I burnt up that little dude. I"m going to take it off when I get home and see what I can find. My goal is atleast get the thing to Idle properly and then perhaps take on this boost leakage. Oh yeah the car won't Idle less than 2g, and it purred like a kitten before my alt went. If any of you can figure this riddle out let me know! later, John jvanen@hotmail.com

The arm is about 6-8" long right above the actual turbo itself. I beleive its called the By-pass contoller in the book. I guess It opens the waste gate on the exhaust side... Its spring loaded but its all one way I don't know how it manages to shut the waste gate.....

IT was the BOV. I found the leak with the carb choke cleaner. The engine totally changed rmp when I sprayed it down. When I disconnected the arm the BOV it was pointing to the Firewall. I'm thinking that it was engaged/letting the air run right past. IF I was able to bend the arm back to the angle it needed to be at...I"m thinking I'd be alright. "m also thinking that this give me an excellent excuse to get a nice new adjustable one. What do you think?

Ok then, I"ll start with the carb choke cleaner and see what I can find. I'll also see what I can do about checking my BOV and making sure its not the cluprit. I'll keep you guys updated .....and Hey...Thanks

Hey guys need some help. It sounds like an Air gun is full on under my hood when boosting. The engine won't Idle but runs fine while going down the road. when the turbo kicks in thats when the air gun sound goes off. Also the sound seems to be coming from right in front of me just on the other side of the fire wall. I seem to have a boost leakage somewhere under my hood and I can't find it for the life of me! Its not a hose. I've checked them all 100 times already. My EGR valve is good. My timing is all dead on. The engine is fresh with only 15k on it. The Injectors are all good, plenty of fuel, plenty of spark. My MAF is good to and woks properly. All Hoses are on tight and clamped down. When the engine first starts its like it can't hold its vacum for some reason. Could my vacum selinoid be causing this? It is a very very loud sound, so much that it takes time for the turbo to catch up in air pressure to compensate for the loss.... So I highly doubt that.. tell me whats up...maybe I'm smoking to much crack or what

I tried unplugging the EGR but nothing happened. I have to test the Vaccum controller and see if that is it. during the testing process though 3 fan blades broke off and went through the radiator...... so my conceren has went to that. However the plan is to just take the fan off and I can still diagnose Tomorrow. Meanwhile the raditor is on its way to Utah from Missouri. I've checked the pop off valve and its good as well. How can I test the Vaccum controler? what did you do? thanks John 77ZT

thanks!!! I'll give it a shot first thing.....

yeah I finished putting fresh turbo engine down into my 77. I"ve taken it out and run it around for a couple of days now. The first day it ran so strong! Now it just sounds like I have an air gun going off under the hood . It won't Idle for very long either . I am thinking it has to be something with the POV are whatever is under the hood there. The engine is completely stock right now FYI. Need to know what you guys think, if you need more info let me know thanks for the help........

I had my stock 81 ZXT with an automatic wound up to 7500 and still pulling hard......poor mustang couldn't keep up. Of course your engine lets out a nice scream when you go past 7G on the Tach . That was on 215 65/r15 Potenza rubber to so go punch it into your transmission calc.

can I get a copy of that to for my 83-77 conversion? t

Hey I am doing a Turbo swap into my 77. Do you happen to know what the magical 6 wires are that i need to hook up? I know that I have all the wires needed in the car. I just lost the paper of which wires I needed to hook up. Any help would be great.