Low/dropping boost?

[Mike Miller]

Possibly a knock sensor retarding timing? Can you swap the MAF?

--mike

On 5/14/2017 12:49 PM, Eric Huppert wrote:
> So, finally installed my chipped ECU in the glacier blue. Old ECU was
> putting out 11 lbs - 1.7ish which was about right for stock.
>
>   
>
> Initial road test with new ECU had 21 lbs on first hit. Then shortly
> thereafter would only go to apx 15 lbs.
>
>   
>
> Then discovered that if I shut the vehicle off and restarted I'd get 21 lbs
> again?
>
>   
>
> No codes, although I did get a 1111 once (typical for chipped ECU's)
>
>   
>
> Car runs smooth and well, will pull to apx 7k with no problems
>
>   
>
> History, all work in last month or so, purchased in Feb and worked on till
> recently
>
>   
>
> Full tune-up to include narrow tip rotor
>
> Timing belt etc.
>
> New bosch correct oxygen sensor
>
> Gutted cats
>
> Replaced all vacuum lines
>
> Replaced FPR with know good as original crapped out
>
> Cleaned ground points
>
> Ben swan chip, wastegate spring,  2.5pt (consistent 21 lbs)
>
> New throttle body hose
>
> Samco hoses
>
> Forge bypass valve
>
> Fuel injectors sent out for cleaning/testing
>
>   
>
> Checked:
>
>   
>
> IAT sensor, ohmed out okay
>
> TPS, checked out good
>
> Altitude sensor, checked, seems okay, pulled sensor from car that had
> chipped ECU and put in
>
> ECU ground to body, good!
>
> Disconnected MFTS to see if any difference (reducing boost)
>
> Checked waste gate control, ohms correct and clicks with output test.
> Believe it's good? Was going to swap parts car solenoid in, but that one
> does not ohm out correctly! (then again, maybe I should as that did pull to
> 21 lbs?
>
>   
>
> Haven't pressure checked intake/hoses yet, but a leak usually causes idling
> issues and it idles great. Have the samcos and all new hoses... Seems more
> electrical?
>
>   
>
> Thoughts????
>
>   
>
> Eric
>
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