He said earlier in the thread it is 60 psi at idle and stays at 58 psi under boost

 

you running m.a.f or speed density. when I was running my maf mine would do same thing went through two of them ,before I went speed density

 

Speed density. MAF is only used for iat sensor. Corey, i have a wideband, fuel pressure and boost/vac gauge. What size oetiker clamps do i need for oe style fuel tubing?and how long does the tubing need to be? Its been a while since i had a fuel bucket assembly out of the tank. Im going to go ahead and swap out this 340 for a walbro

 

Update: i discovered a plug with with broken porcelain under the plug wire. I ended up with a set of BR6EF's in it gapped at 26 thou. I had charlie do some logs, and a little tweaking and she runs good again. Bonehead oversight on my part

 

had same problem years ago on my nitrous car. every since then i check mine with magnifying glass .some times right the store be fore i buy them. GLAD YOU GOT IT RIGHT

 

I dont get why this thing doesnt like a wider plug gap. I put these plugs in gapped at 30thousandths and it still had a miss. It got better at 28 thousandths and went completely away at 26.

 

I have mine gapped at 20 thou if it makes you feel better.

 

I know 26 isnt that tight, but 12-14psi shouldnt be blowing out spark at that gap. I understand tighter gaps as boost goes up to prevent this.

 

I had tr6's gapped at 30 thou in the truck since last october when i put the motor in and had zero issues. Now i need to tighten up the gap?? Nothing else has changed.

 

Copper plugs wear out faster, especially in FI setups...