Diablosport Forums

Hey guys I just downloaded the RKL into my 03 I updated to the r27 version and tried the regular RKL tune and now it pops under hard throttle. Any ideas?

could be 2 things, 1 are u using the puck with the reg tune?if so this may cause to much timing,if so try the stacker rkl.or 2 your draining your rail,i drained mine on reg rkl too and under hard load it would pop out the exhaust,i thought it was the wastegate slamming open but i was told it was the rail being drained,do u have a fuel presure gauge{not rail presure}

Nope sorry I do not have a Fuel pressure gauge, only egt and boost. Does this mean I need to do fuel system mods to run the RKL?

Would a boost fooler help me out guys? Im wondering if I should even run the RKL tunes now, has anyone else had these problems?

I had the same prob on my 03 dodge and it's because i'm draining the rail pressure. I have a fuel pressure guage and that doesn't help with the rail pressure. I have a carter pusher pump so i never get below 15 on fuel pressure even if I have it to the floor. I'm not sure about the boost fooler I kinda doubt that would help any the only thing i think you could do i mod your cp3 or get a rail pressure guage and I think your predator has one on it

Yup, you are draining the rail. A better LP will fix this issue.

You just thin your truck is running good now get a good lift pump and then tell us what you think...........

Oh and you dont need a boost fooler on 03-04.5 just a plug for the wastegate plumbing.

Ok guys thanks for your help, where do I buy an upgraded lift pump?

Logon to DTR's website and check out what they have in the store. I get most of my parts local not online. Ask around on DTR also.

dont forget your fuel filther could be dirty.?!

madmanwithmouse wrote:dont forget your fuel filther could be dirty.?!

Obviously you want to check the cheap side first. Ultimately you are going to have to upgrade to at least a performance lift pump and maybe later a modded cp3. Mine popped when i first tried it and i have twin pumps and a modded fass...... "dirty filters" I felt so embarresed because i should NEVER have run dry. FYI, i can hold 22.5-23k at WOT. I bet if you had a gauge you would witness a major drop in pressure.

Yeah you need to get gauges next and it will tell the story and they have rail pressure guages now and that would tell the real story

thanks guys, Im going to change my fuel filter and see if it is still popping with the rkl program, if it is them Ill just stick to the extreme tunes.