open the motor and take a look

 

Bump. I'm interested to know what the problem is, when you find it.

 

I'm new to turbo's, but why would the motor have anything to do with the boost pressure? Bad turbo ok, bad wastegate, ok, bad lines, ok, motor ? You'd think if there was a motor issue then it would start differently, maybe idle differently, definately drive differently, in this case had you taken the time to read all the information I took time to provide as thoroughly as possible, that the car is just missing boost and drives perfectly fine. As I said though, I'm new to turbos, I'm sure I'm wrong about a lot of stuff, but if you could provide some reasoning behind this statement I'd be grateful.

 

I read that "open the motor" post to be sarcastic.

A few guys in this thread had similar experiences...might be worth skimming.
https://www.evolutionm.net/forums/en...-lines-ok.html

One solution on page 4 was simply replacing plugs.

 

you could be blowing out your spark tried gapping them any tighter?

 

thanks for the link src, gave me a few ideas for troubleshooting the issue.

 

This problem has been fixed. The end culprit was the MBC. Debris had apparently gotten inside some how causing it to quit working properly.

 

so what did you do clean it out? was the ball real dirty?

 

I keep seeing this thought in multiple threads: that closing the gap will keep the spark from "blowing out".

However, the wider the spark gap, the higher the voltage required to jump it; therefore, the wider the gap, the hotter the spark, and the less likely it is to be "blown out". In fact, the NA series Miata engines make the spark jump the gap of TWO plugs before they fire, in order to increase the voltage across the gap.

At higher cylinder pressures there is a complicated interplay of tendency for the fuel to detonate vs. higher voltage required for the spark to jump the gap. In some cases, decreasing the gap may help; in others, increasing it may be the way to go.

I am sure that the experienced shops and racers have figured out the sweet spot for their plug gaps. I would just hate to see people pulling their plugs and decreasing the gap because they believe it creates a hotter spark. In fact it's just the opposite.

Cliff's Notes: Don't everybody tighten the gap in their spark plugs thinking it will always make the car run better.

 

plugs ??? kinda sounds like your timing breaks up

 

If its popping on throttle off then that means misfire, which means you should probably replace your plugs. I did it not long ago with some NGK platinum iridiums, it was worth it.

 

As noted above, the problem was his MBC. I was just commenting on something I had seen several times about plug gaps.