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-   -   boost guru's help me out (https://maxima.org/forums/supercharged-turbocharged/354392-boost-gurus-help-me-out.html)

LatinMax May 16, 2006 06:24 PM

boost guru's help me out
 
Here is what I have installed.
V2 SC with 2.875 pulley
FMIC with 3” piping
Dual stage water/alcohol injection
PI 510 injectors
NRH custom tranny with 2800 rpm stall converter
Cattman 3” headers
3” cut-off valve
Cattman 2 1/2” cat-back exhaust with the factory muffler
eManage (ignition not installed)
J&S

2 Problems:

1- Car will idle most of the times. As long as the car is in “Park” or “Neutral”. But as soon as I put my foot on the brake it comes down to below 500 rpm’s and dies. (I have to drive it two footed, which sucks)
2- Car while driving at mid throttle (not pulling at all or coasting) will start to bounce the rpm’s about 500 rpm’s. I could be cruising on the highway around 60 mph, foot barely on the gas and the car will cycle up and down.
Rob @ NRH thinks it might be my stall converter, but he hasn’t gotten someone here local to look at it yet.

No I have not dynode yet. I tried last week but the wideband for the dyno was broken and should be back this week.

slimer May 17, 2006 11:40 AM

I was having some type of issue like #2, which is making me think that its time to part out. As for #1, I would check vacuum lines, especially to the brake booster. Even a pinhole can be bad.

Have you upgraded your lines to silicone? They don't flex as much and have a thicker wall so you won't have these types of problems.

LatinMax May 17, 2006 12:12 PM

I have replace the vacuum lines with silicone, all except the large brake line ones. My boost gauge also shows good vacuum.

slimer May 17, 2006 12:33 PM

I think mine is a coil pack issue. Have you looked into that?

maxlinegtr May 17, 2006 02:01 PM

are u flooding it with too much fuel?

LatinMax May 17, 2006 04:19 PM


Originally Posted by maxlinegtr
are u flooding it with too much fuel?

That is possible. That I won't know until I get on the dyno. I might need find another dyno, since the shop still hasn't gotton the wideband for the dyno back.

LatinMax May 18, 2006 08:31 AM

Anyone else have any ideas?

Chief Brody May 18, 2006 11:34 AM

You don't need a wideband to tune closed loop, just a logger. The ECU will try to get you back to 14.7 but it can only do so much if you are running way rich or lean. See what the fuel trims and o2 sensor voltages look like, that will tell you which side of 14.7 you are on.

How do you have the emanage set up? Do you have the support tool where you can enter in your old and new injector size?


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