Yesterday I threw in a 340lt single pump, 1450fic injs on stock reg, rail and lines on e85...scaled them and they wouldn't work.... Stock injs work fine .... It seems that there may be too much fuel pressure and the injectors just don't open at all.... We loosened the fuel rail to create a fuel leak to just quickly test fuel flow and the car actually started.... There was a massive amount of pressure which makes us believe maybe fuel pressures too high.... Any opinions? Has this happened to anyone before? I understand that a aftermarket fpr will fix this but I really wanna keep the stock fpr.... Goal is 550-600hp

 

Why do you really want to keep the stock FPR? Especially if you know it will fix the problem? There's no downside on using an aftermarket FPR, besides having to spend the money.

Aeromotive's FPR will work great. I've had one on my car since I put my original Walbro 255 in. You can also easily install a fuel pressure gauge with an aftermarket FPR.



-Bink

 

Did you rewire the fuel pump? I would try to get a reading of your fuel pressure for further diagnosis.

-Jesse

 

Yeh pump is hardwired to battery.... I will check fuel pressure tonight afterwork and the reason for wanting to keep the stock fpr is cos the cops here in aus look for that **** and then send you to an EPA station

 

Are you sure about an FPR being a problem? I mean even Massachusetts/California aren't that strict.

In all seriousness, I don't see why that would be an issue at all? If anything, one can argue it makes the fuel system more efficient. It doesn't harm nor change emissions of the car in anyway.


-Bink

 

Oooooo i wish they weren't bud.. But they do.... And when you go for a smog test they even take photos of key parts like turbo inj fpr etc..

 

logic and reason dont work with government agencies.

 

Wow really? That's hardcore...

Yeah, good point. This can be seen everyday on the news...



-Bink

 

the only solution i can think of would be a fuel pump controller to run it at a lower duty cycle so it doesnt overrun the regulator.

http://www.weldonracing.com/product/...ontroller.html

http://aeromotiveinc.com/products-pa...ed-controller/

 

Update.. I hooked my fuel pressure gauge and it was reading over 100psi....I swapped out the regulator and pressure went down to 55psi.....is 55 acceptable? Or should I look to lower it?.....55 sounds bait too high for me

 

Mate if you have to run an aftermarket FPR just get it powdercoated/anodized black if you can. Some (many?) police really don't know what they are looking at, and if they see something shiny they assume its aftermarket and put the duty to prove its legal onto us by issuing a defect notice. I've been questioned about the factory strut brace and factory intercooler and I actually used my phone to show them a Evo brochure picturing both items. They weren't too pleased but I was right, and polite about it. They are just doing their job too, but it can be really frustrating when you know the modification is legal but you have to take time out of work to go prove it.

 

Is that 55 psi with or withiut the vac line connected?

 

With the vac line connected