hammer71

my 03 will not go above 2100 rpms. if i do, it's like a governor kicks in and takes it back to about 1000 rpms. what is my problem. the truck is a auto with 127k on it. nobody seems to know why it is doing this. truck is completely stock.

Jeteys5.3

iTrader: (4)

this happened to my buddys dmax once.......his fuel filter was clogged with bits of junk due to getting some bad fuel the last time he filled up. Might wanna check the fuel filter and make sure its good to go.

L7 Sierra

I had a similar prob when I drove big rigs. Diesel absorbs tons of water compared to gas, and your probily hittting the filters restricted limits when you rev it up. Thus causing lack of rpm for a minute.

I changed my filters on the side of the road, and presto. I always had spares, and you should too.

hammer71

filter has been replaced and it still does it, im starting to think fuel pump, it runs fiine just won't push the rpm's up

Jeteys5.3

iTrader: (4)

i'll ask some of my diesel buddies tomorrow for ya

hammer71

thanks, i'm not getting too much info on this

Jeteys5.3

iTrader: (4)

ok, What codes do you get when doing the key [on off on off on] this should show codes in the odo display?

hammer71

no codes at all, this thing runs perfectly until about 2100 rpm

Jeteys5.3

iTrader: (4)

ok i'll tell them, i'll let you know more tomorrow

05GMCL33

iTrader: (2)

What's your fuel pressure at idle and high idle? What is the boost pressure doing?