Intermittent miss up to 2k and idle when warm NA-T

[pwpanas]

Originally Posted by Travis89Turbo

Update!

I bought a new Mac tools pro fuel pressure test kit and it had a banjo bolt adapter that I hooked into the top of the fuel filter...

Results- with Vac line disconnected and plugged 51psi. Factory spec 38-44

With vac line hooked up 42psi. Factory spec 28-34

1500 rpm 55psi with vac line hooked up. That is out of factory specs so I will be replacing it.

I apologize for not adding the info about the stock distr cap. I reinstalled the original with no change. Although I did have to change plug wires back to OEM as well. So I put the 4 runner stuff back on and doubled checked that the timing is at 10btdc.

Is it possible that the added pressure from boost could damage the factory fuel regulator?? Should I stick with OEM or go to an aftermarket in your opinion.

My BOV is an HKS SSQ that I bought a recirculation nipple for so it has been blowing back into the intake post MAF, pre turbo!

Regarding the FPR, I'd try with one from an Mkiv TT if it's a different part number and if it fits. You could even try a used one (yours is the first I've heard of one that has problems). Just a thought - do you think your fuel return line could be blocked/kinked/crimped in any way - that would raise fuel pressure regardless of how well your FPR works. You could always go to an aftermarket FPR (a lot more expensive, especially after the adapters, braided hose, etc.) if a different oem fpr doesn't do the trick.

To bad you don't have a fuel controller (eg. A'PEXi AFC) - you could just dial down the fuel at idle based on the higher fuel pressure, then the additional fuel would be available under boost. Capiche?