IRP removal tool
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Are you sure its not a combination of the big tires and those 3.73 gears.
I know this is an apples to oranges comparison, but I swapped a 2.41 rear end under a Trans am that had a 3.23, and the car couldn't get out of its own way. It felt like I lost half the power, and it felt like It was starting off in second gear. (ran great on the highway though...)
Just a thought...
I know this is an apples to oranges comparison, but I swapped a 2.41 rear end under a Trans am that had a 3.23, and the car couldn't get out of its own way. It felt like I lost half the power, and it felt like It was starting off in second gear. (ran great on the highway though...)
Just a thought...
Oh, and is that "romp romp" kinda like a "surging" sound as the RPM's get up there? Like, when I'm in 3rd getting close to 70MPH because I nailed it, I notice there'll be a slight fluctuation in the sound, kinda like when you've got two sounds really close in pitch and they make a fluctuation or vibrating sound, if that makes sense. Could that be a fluttering IPR? I make good pressure and the duty cycle is still low... I can get 2700PSI as 38% Duty Cycle. I'm thinking MAYBE a solenoid pack... when I ohm it out, what should I see?
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Ouch! Now that's bad... the thing is, I would think you'd have bad numbers stock if it was really bad. I really wonder if it isn't injector O-rings. Any of y'all agree or am I missing something?
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
Seems like if it wad leaking/bypassing it wouldn't do 2800psi.
Have you checked for a loose nut between steering wheel and accelerator pedal? Lol.
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Hey, get with Joey at Terminator Engineering... he helped me out with mine!
Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
Oh yea clean and reading good. This truck has been a dog since the day I bought it with 105,000 on it. It now has 126,000. Buzz test and contrabution test always are good. I've thought about the o rings but I thought I'd have a better indication that that is the prob.
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Well, like I said, it's worth a shot IMO... beats a new HPOP. Buzz and Contribution are too vague... you could still have a slightly off injector and it won't be bad enough to fail CCT. What're your rotational velocity readings for all the injectors?
Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
I'm pulling 20,000 lbs gross right now with a 3/4 ton 7.3 '01 and you know it's back there but man it pulls like a freight train. Yesterday just the truck and trailer weigh 11,500 lbs and from 0-80 it took 33sec. My truck takes 34 sec to get to 80 empty. Urgh!
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
HI could see how he might have a slow-leaking O-ring. His pump can probably make up for it in stock, but it looses it with a tune. Sound right? I mean, it's worth a shot... $50 beats $500 if it works out. That's what I did with my IPR... $30 of O-rings beats $200 for a new IPR. But I was talking to Clay and he said HPOP failure on these trucks is rare... I
Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
Has that ever worked. I ask cause I thought there were signs that lead to bad o rings like oil in fuel or fuel in coolant. I'm definatley willing to give this a shot just curious what my chances are for a fix!
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
If it comes out of the top of the injectors under the valve covers, it drains right back down into the pan again... I think.
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
I'm thinking you just need an ICP to IPR comparison at various RPMs and loads... also, rotational velocity numbers at operating temperature would be nice (only reads at idle so don't bother with the pedal). If you have Vista or Windows 7, you can use the snipping tool to take screen shots of this stuff. But I've got a hunch that your numbers won't be too significant if it's a small leak... but what do I know? Just guessing from what I've seen with my truck... I just know I have a slower pump and am building more pressure than you. I also know from experience as well as from talking to Clay and Joey that HPOP failure is pretty rare. I'm sure there are some guys on here that have a better idea of what to look for... I'm sure you've been through this too, but how about boost leaks or exhaust leaks?