i have a turbo b16 with walbro 255 pump and 580cc injectors and aem fpr., The engine just recently started missing, and ive noticed on my fuel pressure guage i drop all pressure with in 5 min it will go from 40psi to 0psi once the engine is turned OFF. Is this normal?? because prior to missing the engine would hold 40psi for hours if not until the next day when i turn the engine off.

thanks a TON!!

 

pop off the vac line to the fpr and see if it is leaking there. i know the older ones had issues with ripped diaphrams.

 

thanks, I'll check that out! so is it normal for fuel psi to drop that fast or should it hold with the engine turned off?
again thanks for the info..

 

I've found it to be normal for a quick fuel psi drop off with the Walbro pumps.

 

that helps alot man! thanks again, I canceled each cylinder to try and isolate the problem and i believe the problem is coming from the no. 1 cylinder, I think the plug wire is grounding itself out, just a few more tests but all the help is appreciated!

thanks alot HT