2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

HELP only 5lbs of boost!

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Old Oct 20, 2006 | 09:56 PM
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HELP only 5lbs of boost!

okay just dropped a new motor in my 89fc tII got the turbo fully rebuilt and installed a avcr along with my s-afc that i had on it before , everything checks out on the avcr but still no more boost , i want about 9-10 lbs but somethin is tellin me to go kick rocks , can someone help please this is pissin me off.
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Old Oct 20, 2006 | 10:04 PM
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Do you have a boost controller and after market boost gauge? Leaks will cause MAJOR boost drop.
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Old Oct 21, 2006 | 10:07 AM
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i had that problem, but when i got a downtube it jumped up to 12, so then i got a MBC and ported the wastegate!and now im pushing 8!
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Old Oct 21, 2006 | 10:08 AM
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^^
Are you talking about when you got a 3in downpipe? How big did you port your wastegate?
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Old Oct 21, 2006 | 09:27 PM
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i have a aftermarket guage , and aftermarket controller , its all sealed up pretty tight , i even raised it to 1 bar and still 4 1/2 -5 lbs
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Old Oct 21, 2006 | 09:46 PM
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did you use rags to keep stuff from falling in to your intercooler pipes while it was apart?
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Old Oct 22, 2006 | 12:32 AM
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yes
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Old Oct 22, 2006 | 12:33 AM
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what would that do if i didnt ? i know i did but how would that change things ?
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Old Oct 22, 2006 | 12:41 AM
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Have you done a pressurized leak test?
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Old Oct 22, 2006 | 10:00 AM
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yes it was a 3" downtube, and i ported my WG to HUGE, no about 2 times as stock
Attached Thumbnails HELP only 5lbs of boost!-wg.jpg  

Last edited by ryderX; Oct 22, 2006 at 10:03 AM.
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Old Oct 22, 2006 | 10:15 AM
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Originally Posted by Rx713B_RE
okay just dropped a new motor in my 89fc tII got the turbo fully rebuilt and installed a avcr along with my s-afc that i had on it before , everything checks out on the avcr but still no more boost , i want about 9-10 lbs but somethin is tellin me to go kick rocks , can someone help please this is pissin me off.
Stock exhaust and intake? And did you bypass the stock boost control solenoid?
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Old Oct 22, 2006 | 01:03 PM
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if you used rags, then you may have left one in your pipes... happens all the time to forum members
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Old Oct 23, 2006 | 02:50 AM
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its a full 80mm exhaust and aftermarket intake , does the boost control solenoid get removed when you do emissions removal? im not to sure where the solenoid is , and we double checked for rags lol
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Old Oct 23, 2006 | 02:55 AM
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detach the wastgate hose and leave it closed. Be careful not to overboost.
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Old Oct 23, 2006 | 10:09 AM
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Originally Posted by myfc3s
detach the wastgate hose and leave it closed. Be careful not to overboost.
Will that detect if there is a bad wastegate?
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Old Oct 23, 2006 | 02:20 PM
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Originally Posted by Rx713B_RE
its a full 80mm exhaust and aftermarket intake , does the boost control solenoid get removed when you do emissions removal? im not to sure where the solenoid is , and we double checked for rags lol
Check the FSM to confirm whether your solenoid is present...
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Old Oct 23, 2006 | 05:31 PM
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From: OR
k ill check it out where would it be located ?
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Old Oct 24, 2006 | 03:40 AM
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From: OR
and i dont have a factory service manual
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Old Oct 24, 2006 | 07:29 AM
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Originally Posted by Rx713B_RE
and i dont have a factory service manual
Look at the FAQ section of this forum. It has links to them free online that you can download. I also chose to print them.
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Old Oct 24, 2006 | 07:35 AM
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Did you change anything in your fuel system?
Did you change the ECU or add something that can control fuel?


-Ted
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Old Oct 24, 2006 | 02:31 PM
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Stock injectors , fd fuel pump, safc, avcr, full 80m exhaust, huge front mount, fcd, emissions removed, i think thats pretty much all thats dont to the car , i have 680 cc injectors sitting there but i want to make sure im gonna run more than 5 lbs before i throw them in
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Old Oct 24, 2006 | 02:33 PM
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but everything is rulling nice and the way it was before when i was pushing 10lbs
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Old Oct 24, 2006 | 10:27 PM
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What are the S-AFC settings?


-Ted
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Old Oct 25, 2006 | 01:22 AM
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id have to look but i know everything is **** , cause its still on the settings when i was pushing 10lbs on the old motor so i dunno , i think it might be something with the engine wiring , do you think that could be a possibility ? i can get a new harness and starter harness for 100 shipped , sound like something i should do ?
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Old Oct 25, 2006 | 11:39 PM
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n/m guys i fixed it , thanks for all your help
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