Cowboy

Hi all,I'm having this problem with a 99, 5 speed, fairly stock, ~25,000 miles on new injector pump , little bullydog 'chip' and BHAF. I'll be going down the road normal, and suddenly I'll loose all power, it just wants to idle. Now if I hit the clutch, and let the fuel pedal all the way out, then push it all the way back in, and let it all the way out again, it's fixed, and I have power again. and when it has this problem the check engine light turns on and stay on for about 30 minutes. I understand checking for codes would be very helpful, a friend of a friend may have a code checker I can use but I'm not sure. Is there something I can do with the key to check for codes?thank you for the help.

I believe FP is good, 14psi cranking and never goes below 10psi. havent looked in a while with the highway WOT. but I did check when I was having the problem and it stayed right at 13-14 psi. OK I will try and get it checked for codes, it's mostly a farm truck so it may not be anytime soon. Thanks ~Brad

OK a few day ago this happend and I wanted to know your guys thoughts and maybe what you think the problem could be.The truck, '99 3500 4x4 5spd CTD.OK it was about 50* outside, I started the truck, it started like normal, didn't let it warm up or anything. drove about 500 feet and shut it off for about 20 minutes. Tried to start it and it would only crank, didn't try to fire or anything. First I checked all the fuses, under the hood and in the cab, nothing. I then tried taking out the power puck thing, that splices in the plug that goes to the back of the Injector pump. I took it out and still nothing, put it back how it was and nothing. I then went inside and checked on the internet for any info and found that in order for the IP to inject fuel the red and black wires on the plug need to have positive and negitive power, so I went out to the truck and unpluged it again, took my multimeter stuck one probe in one plug and the other in the other. turned the key on and it had power, so I pluged it in and it started! I have started the truck more then a dozen times since then and it has started every time.Could I have scraped some junk away from the plug to where it made contact?Oh and NO check engine light.

The drive pressure they said was 77 with the wastgated twins, and they never saw over 1:1 Exhaust to Boost with the single A5000, so that tells us that the DP never went above 60 psi. so the drive pressure was higher with the twins. now here's what I don't understand. The Drive pressure was higher on the twins. Boost was Lower. Compressor output temp was 100* lower on the twins, but they got a B&D aftercooler and they said they never saw over 100* with a input temp of 460* with the single, so 360* with the twins. and EGTs were Lower. How can all that happen with the SAME amount of fuel. They said the max EGTs on the dyno at 3,000 rpm was 1,350* with the single, and max they could hit EVER with the Twins was 1,200 off the dyno, and 1,100 on, so either way they were a bit lower. And the main reason I want to try to understand it better is that I was thinking on putting Compound HX35/HX35 (yes same stock turbo) together. I've always thought that the primary lights the secondary, so how would it act with the same turbo. I know that drive pressure could be a problem, but face it, this isn't going to be a toy, it's a truck, I want the lowend torque, and it's never really going to see 2500 rpm a whole lot. And fuel milage might go up a bit too, for the reasons of the second turbo taking the power out of the exhaust that would otherwise go out the exhaust pipe. Yes it would add more DP so the engine would have to work a little harder, but IDK how much ACTUAL power it take to push it through the extra turbo (reasearching that stuff right now).

So I have found, I've been searching the forums for what I can find. Found a few with enough detail to put in the spreadsheet, but not bunch, so far so good though. What all factors are you thinking? I know that VGT turbos are going to be everything short of impossible to work with on calculating things. But besides that the list I know is relatively short (I may be missing something), so far I got: Intake Manafold temp, Compressor intake temp, EGTs, Absolute Compressor intake pressure, Absolute Compressor output Pressure (or Pessure ratio), Drive Pressure, Compressor Efficiency, Turbine Efficiency, RPM and a lot of the basic things, like displacment and airfilter vacuum. Obviously theirs little things like engine oil you use is going to effect it some, but I just want to get a idea what the turbo is doing, and how it reacts in different senarios. I've got a spreadsheet going, nothing great, but it would be kinda neat if it could calculate the drive pressure... which I don't know is possible. Thank you ~Brad

I'm not sure if this is the right section to put this. Mods please move it, if it's not. I'm looking for some numbers, Boost, EGTs, Drive pressure, RPM, and Approx outside temp. like when Boost is at X, what is all the others at, and what Turbo your running. I saw this article a little while back, and towards the bottum of it they say 2 things about there twins setup where "Unclear" to them. Well that's got me trying to learn why those things happend, and what is the cause. and that's why I need the numbers, so I can compair my numbers, with real life. Thank you all, I've learned a lot from this forum so far, and hope to be able to contribute my findings in the future. ~Brad

Yes you are right, there was a some #REF! cells. I was going to use them as part as the formula, but decided on going about it a different way. So I have made a new version with some color coding and got rid of the #REF! cells. Blue are your variables.Orange are variables but their pretty constant. I could have just made them a constant, but figured what the heck.Green are drop down menus.and Light yellow are you're results.If you have any questions let me know. Compressor Efficiency and Temperature v1.2.xls

here's the best one I got, tell me what you need a pic of and at what angle and I'll get them tomorrow, it's a 97 stock auto if that helps

Well I've been lurking around here for a little while, and saw that formula and pounced on it to give the whole thing a try.OK well it's in the attachments below.As you might have noticed the numbers I get are not the same as the ones in the pictures, but their pretty close(hate saying that). If someone could try that formula and see what they get that would be cool, note the output power is in KW, so I had to convert it to HP.I tried to comment everything best I could, that's the red things in the corner of the cells.If I can help more in anyway please let me know.Thanks, BradEDIT, new spreadsheet is attached. Compressor Efficiency and Temperature v1.2.xls