im getting a p1093 code. Recently purchased diablo predator. My question is, How much of a power loss is there, when you have, this "low pressure in the fuel rail during enrichment"? I notice a lil more response with the tuner but its not really noticable. Need help.

 

when was the last time the fuel filter was changed?

 

I changed my filter, last week after i purchased the tuner. I checked my diagnostics after i made a few runs with tuner. ( and was kinda disappointed, that i didn't really feel a big difference) anyway, saw i had the code. so i ran it on stock tune ( hard accelerations) and the code came back. I put 85 tune back on and drove a few days of normal driving and code was back. I checked my oil for a diesel fuel smell, and none. I do notice on hard accelerations "tuned or stock" that in 2nd gear it seems to hesitate or kinda platau around 2500 rpm and then pick back up to redline then shift. all other gears rev out normal. I get mid 14 mpg city, and 16 on hwy. all hand calc. (stock)

 

you should try and get the cp3 tested with a tech II or someone in sanangelo who has efi live, theres tons of guys i know out there who has those tools.

 

okay i will, thanks 2500 HD. Should i shim the fprv or get a race model. or will getting my cp3 checked tell me if i need to do either?(shim or new pump). Can you pm me some peeps that might help me out with the cp3 check.

 

since yours is a lb7 buying a shim kit wont help cause it wont work for your engine, or the fprv plug so don't waste ur money, but it can be shimmed though for about 20 cents.

I dont think that is your problem though, getting your cp3 check with a scan tool will tell you more.

 

 

you again...

 

I missed you

 

how come shim kit wont work on lb7? or a race fprv? just curious, so i presume it works on lly and lbz. How and Why on those and not lb7? I've seen threads of others doing it so if it doesn't need it why do it.