shutzero

No before I changed the fpr it would stay at 50

rkinney

If you have replaced your regulator and your fuel pressure is holding, then your starting problem might not be fuel related. Did your problem begin after any changes you have made?

shutzero

I kinda noticed it after I got my tune

rkinney

You might want to contact Trifecta and ask what changes were made to the tune. Let them know what problems you are having and maybe that will help pinpoint what is going on. Just a thought.

shutzero

i checked with him already and he couldnt figure it out...maybe its the starter but i really dont know, im kind of shooting in the dark...also, my idle is still kind of high i had him set it at 850 and it sits around 950-1050

SS RRR

iTrader: (2)

LT1 f-body tachs are notorious for being inaccurate so it is entirely possible the idle is where it should be.
Was the new FPR stock? As stated your pressure should not be at 50psi. That is too high.

shutzero

The new fpr was a stock one from ac delco

shutzero

Anyone else? I don't wanna keep buying parts that I don't need lol

shutzero

What should my iac counts be

bore.me

iTrader: (15)

I have a similar problem. My starter will crank for about 7 seconds before the engine starts. When i turn the key to run the fuel pressure will shoot right up to 44 psi and then drop down to 0 immediately after. At idle it's around 36 psi. Could i need a new FPR?

shutzero

i think earlier in the thread they said if the pressure dropped immediately to 0 it is the check ball in the fuel pump...

anyways, my iac counts are 23...i have no idea what this could be

cmoneysws6

Did anyone ever figure out the issue? I have had the same problem for over a year now and haven't figured it out but it makes the car look like it's age when it's in much better shape.

Thanks!!!