Sputtering under boost.

[trapspeed]

I don't know what caused it but my car starts sputtering when I go over 14psi. I leave it at 10, go WOT and it's fine. If I turn up to anything over 14 the car starts sputtering and it goes nowhere. Anyone have any idea?

 

[EclipseTrbo420A]

I don't know what caused it but my car starts sputtering when I go over 14psi. I leave it at 10, go WOT and it's fine. If I turn up to anything over 14 the car starts sputtering and it goes nowhere. Anyone have any idea?

Do you still have all of those fuel mods ? IT could be a faulty boost gauge reading. Im having that problem as of lately.

 

[trapspeed]

Do you still have all of those fuel mods ? IT could be a faulty boost gauge reading. Im having that problem as of lately.

I don't think it's my guage. I have PTE 680cc's and a Walbro 190.

 

[Ultimatedsm]

Your turning up the boost and it spudders but at 10 psi it doesn't. Hmmmm...there is a few things you can look at, first thing is do a BOOST leak test. If that doesn't help check your plugs if they are gapped properly, you are probably blowing the spark at 14 psi and you need NGK 6ES or 7ES spark plugs to make the car run properly.

 

[trapspeed]

Your turning up the boost and it spudders but at 10 psi it doesn't. Hmmmm...there is a few things you can look at, first thing is do a BOOST leak test. If that doesn't help check your plugs if they are gapped properly, you are probably blowing the spark at 14 psi and you need NGK 6ES or 7ES spark plugs to make the car run properly.

I have NGK BPR7ES set at .28. They've been fine. My MBC is acting up, I turn it but it doesnt effect what boost I'm at. You think there could be a leak there?

 

[ddavisaf]

Run a boost leak test like he said.