Turbo/Boost problem

[Stabs69]

I just put in a rebuilt engine, a new transmission, an EVO III Big 16 turbo and EVO III exhaust manifolded, a hallman cockpit boost controller(which I haven't touched yet), a after market boost gauge, and all new hoses, belts, plugs, and a lot of other stuff. I have been breaking in my new stuff. I decided to push it a little more. My car runs great but once I hit 20 psi of boost my car starts to hiccup or shutter and then it acts like it is back firring and a puff of smoke comes out. Any help would be great. Thanks a lot. My car is a 1992 Plymouth Laser Turbo.

 

[hiimnotcool]

that kit looks pretty good, i think you should get the bigger injectors then the 550's just to leave room to upgrade later (if you want). And I think the walbro 255lph pump would be better than the 190. Also, if you don't want to be in sole control of tuning the car, aka DSMLink, you could look into a Keydiver chip. It pretty muchs tunes your car automatically and then the AFC is for fine tuning. I have it and it's definitely hassle free considering you don't really need to do anything. I know others will direct you to DSMLink, which is probably the better choice, but it's more 'involved'. All depends on what you want. If you look in the classified section on this forum you can find most, if not all, of what you're looking for and get a much better price than other places online.

 

[Stabs69]

You can't run any lower boost than what the wastegate spring on your turbo allows it to make. I really don't think the factory actuator on your EVO III 16G has you running 20psi. You installed the Hallman but say you haven't touched it yet. Does this mean it is unscrewed as far as it will go? The EVO III 16G flows a hell of alot more air than your stock 14B did. Also, you have to realize that people on here aren't being rude or sarcastic. It's just that upgrading your fuel system is a very important and basic mod. Too many people buy a DSM, slap all these parts on, and then post about problems without reading/researching everything first. Upgrade and rewire your fuel pump, get larger injectors, get a way to controll them (AFC or Link), and definitely buy yourself a datalogger. Do some searches and reading and you will learn the right way to do things and what works best for other people with similar mods.

Just check my MBC and it was not turned all the way down so the boost was turned up.WTF I tunered it all the way down and now it runs at 10psi. I feel like a comeplete idiot. Thanks for all the help everyone gave me and I still want to know about anything I should do so that I can turn the boost back up eventually and any idea's you all might have.

Now my car should be pretty safe running until I can get a fuel system upgrade, right?

 

[endeffect0]

yep! your nice and safe now. you should have no issues with running lean or any sort of stumble if you do then you need to keep hunting for the problem.

their is plenty of great information on this site and many people who are eager to share knowledge. so do some searching on specific topics and ask questions when you need more than you can find the search. and feel free to PM people who have posts up about specific topics or problems they ran into. we'll have your car in top shape in no time!