Unlocking Hidden Power: DIY boost fix for Supercharged 3800 Pontiac Bonneville
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- เผยแพร่เมื่อ 31 ก.ค. 2024
- I picked up this 1999 Pontiac Bonneville SSEI with the supercharged GM 3800 engine. Only problem is it didn't make any boost anymore! We had to fix this. Follow along where I show you how to troubleshoot an M90 supercharged engine that isn't making boost.
Test your supercharger bypass module, look for vacuum leaks, and boost leaks.
This should work for most GM supercharged engines. Grant Prix GTPs, Supercharged Buick Regals, or even Ford Lightnings
Two different hose kits
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hpsimotorsports.com/products/...
Chapter Info
00:00 Introduction
00:58 The Problem: No Boost!
02:01 Boost Modulator Test
03:38 Vacuum Test/Hose Replacement
07:05 Outro
#supercharged #diy #mechanic #pontiac #boost #classiccars #vacuumleak #m90 #racing - ยานยนต์และพาหนะ
Good motors those 3800s, we got them over here in New Zealand in Holden commodores, pretty bullet proof for what they are
I have heard people say that think they are the most reliable engine GM has ever made. I don’t know that I agree, but they belong in the conversation.
This one has 250k miles and runs like a top other than a noisy supercharger bearing. $80 fix.
The Vacuum line that runs off the T under the SC snout back to the MAP was a major headache for me for a time. Damn thing blew off the MAP(I assume under boost) and I didn't see it since it's hidden back by the firewall. The factory rubber boot was just to loose to hang on the nipple on the MAP anymore. Ended up doing what you did here. Replaced it all with high temp silicon tubing and some Brass T's. Even put a little hose clamp on the MAP connection for extra piece of mind.
I put a few miles on the car before I sold it and never had another boost issue with it. If I were looking to make it perfect I would have for sure added some hose clamps too.
Theres a calibration for that bypass valve. New one ships with a clip that locks it into the correct position
By chance do you know what inside diameter of those hose between the supercharger bypass actuator and the vacuum tee up on top? Do you know what the middle leg of that tee is used for? mine has a screw capping it.
Off the top of my head no, but I’ll go take a look at it tomorrow and see what I can see
@@CatfishMotorsports thanks. The thin wall stuff keeps kinking and collapsing