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Boost jump, and idle problems...

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GSTicky04

15+ Year Contributor
55
0
Apr 29, 2004
Ankeny, Iowa
Hey guys,

I have had my car for about a year now. I have a mbc set to 15psi, and it has always stayed at it through all gears. Now I am boost creeping. First and Second is 15psi usually, but then after that its 12-14psi, and that's it. I do have the t-25, and the only thing I have had wrong with the car (check engine light came on twice) and there was a corrosion on the male end of the fuel line, and also I had the fuel solenoid replaced because that was also corroding. It could of been for odd reasons but after that I mainly use 91 octane and no problems ever since. Also to help my boost creep would a tubular 02 housing help? Also I did notice that my idling is kinda surging a bit, what could be the cause of this? It doesnt jump drastically but I mean if it was at 750rpms at idle it would jump up a tiny bit (in other words, it is not steady). Also my air/fuel gauge quit working before this stuff and as well as my cigarette lighter. When center concole was pulled the wire broke off the plastic piece that is connected to the 12v. That could be the reason why the air/fuel is not working since I believe the power to it goes to the 12v. I think I have the wires mixed up some how but I rewired it and nothing made either of them work. I will try to switch what I believe is the other alternative for the wiring, but if anyone has there's hooked up to the 12v, a picture of the wiring would be an easier way for me to tell if it is all messed up. Well thanks for everyones time,

- Devin
 
i'm having the same problem.

1st gear 20psi
2nd gear 18psi
3rd, 4th, 5th, 16psi

let me know what you find out.
 
yeah I will man, but if I don't let me know how you resolved your problem if you do so before me. Mines jumping back just a little bit now its more in the 13-14psi range. Anyone help us!
 
did u think about boost leaks...all of a sudden it happened, well?...its probably some stupid intake leak somewhere. Run a fog machine through it. that should help eliminate that and then u can go to the next
 
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