Hey guys I just recently had the 80 Econo tune flashed on my PCM by dp tuner. I have plenty of power now but there's a small problem, there is a knocking noise coming from under the hood. So my buddy hooked his auto ingenuity up to it and my ICP is running around 800 psi when it should only be around 500 psi. I'm guessing that's the reason for the fuel knock. I was just wondering if anyone might know why my ICP would have shot up so high after installing the PCM with this tune on it or if something else could be causing this problem. Thanks in advance fo any info.

 

I would get a hold of Jodie at DP. He knows these engines inside and out and it is his tune on there.

 

Yea we already contacted him and he seems to be clueless about what the problem is. I'm kinda disappointed in this Jody guy I might have to find someone else to fix this problem.

 

HMMM He has always been dead on when I contacted him as well as others in here. Strange. Have you tried talking with Cliay at RiffRaff deisel? He may have som einsight for you. he is also a sponsor on this forum.

That being said tho... With my DP tuner in Factory..all sounds normal. but when I put mine in 80 Econo...I do get a little more engine clatter when accellerating. Otherwise, it sounds normal. I would attribute that to the additional fuel that is being shoved through the injectors.

How hard is the knock? Have you re-torqued your injector hold downs and rockers? That will quiet a motor down some. Could be you might have one a little more loose than normal.

 

Same thing here, I have a little more noise until it gets good and hot.

Re-torqueing everything might take care of it.

How many miles on your truck Egreath?

 

Mine is just the opposit it knocks more after it warms up. My truck is an 01 I rebuilt the Engin at 210,000 miles it has about 216,000 miles right now.I also got the injectors rebuilt, turbo rebuilt and a t-500 hpop.

 

The 80 Econo asks for 478.624534509 PSI of oil pressure at idle.(exact number)

What does it do when you unplug the ICP sensor?

If I had to guess it has trash in the IPR. It can be cleaned to see if that's the culprit.


Diane

 

When my truck is in any mode other than stock, it knocks louder than it does in the stock mode. Did not think my truck engine could get any louder. Boy was I wrong. What makes the truck louder? Are the injectors firing harder because of pressure?

 

Mine does it also and that is how i can tell if a 7.3 is rolling through the camp grounds is chipped or not. Sometimes i will flip it to stock to just quiet her down as much as possible and make it less sensitive on the "go" peddle.

 

The engine is probably louder because of the increase in fuel going to the cylinders. This creates a louder combustion event.

 

Its normal. We've had many talks on this subject. I don't know what the stock ICP pressure is but Jody always increases it in his HP mods. Some guys like it and some guys don't and change. It won't hurt a thing. I have many of his tunes on my F5 and learned to like them. Do you have the Fuel cross over to feed the injectors from both sides of the heads? This will quite it down alot and make up sometimes for pour injectors. I had a bad knock on number 8 and it all but took it away. Any way don't worry about it unless you don't like the power increase.

Chet

 

This is the problem with today's "instant gratification" crowd.

It took you 12 hours to decide that you're not impressed with Jody without even giving him a chance to make it right?

The post that was written by DP-Tuner giving you the EXACT value of injection pressure desired at idle speed/load is exactly what it should be. Some people do a little more, some a little less. What it boils down to is that for some reason, you're getting a reading nearly TWICE what the tuning is asking for.

 

Cody (I think), Your recent post concerning the DP tuner 80e was a stand up move.
Like your sig, I haven't always agreed with you, but new respect for you for sure.
If I hadn't already ordered a DP myself you would be in line.
Best success to you.

 

Well I could go on and on about what I think right now and I know why my bud is upset. But for now let's stick to the problem! He left a few key points out. 1st and foremost here is the PCM that was flashed, pmt1. When we originally built his set up it had a chip on the PCM and ran well but was very noisy. So I told him to pull it and run the PCM stock. Well it shifted like crap and didn't run all that great. So we had a spare PCM out of an '02 that I knew was good and worked well on its truck, so we put it in and boy did it run better and shift better. So "I" called Jody and asked him if he could adjust the pmt1 to run with a tune and shift more like the '02 PCM, he said sure and that the pmt1 wasn't the smoothest and could use some adjusting. So I had him send it to him. When he got it back he put it in and thought it ran worse than before. I told him to let it warm up and see if it gets better. Long story short for whatever reason Jody burnt a "stock" tune on an already stock
PCM. He saw the mistake and had us send it back. By the way no charge except shipping. Then we got the PCM back and immediately we could tell it was tuned but at idle it was real loud. I told him to just try and get use to it. Well I went over with my ae one day after him complaining about it sounding like someone with a sledge hammer banging on a tin roof. Immediately I noticed the icon was around 850psi. I thought that's not right. So we went for a few test runs and all was good except the 14% dc and the 850 psi. Then we tried the '02 PCM. Sure enough it idled at around 480-500psi and 8-11% dc. I called Jody and asked him and like Cody said, the numbers aren't supposed to be that high. A lil lower for splits like 480 and 500 for singles. And around 11% dc. So my question is why does it idle good with one and not the other? If it was a dirty ipr, why would changing pcm's back to back cause the pressure change? We checked the pressure within 5 min of each try and the oil temp was at least 180. I did try unplugging the icp and it seemed to be about the same but I cannot verify. My ae wasn't hooked up. Could the PCM have a glitch in it and still run but have some values off? I'll be getting back with the op and doing some more logging with the ae. Just looking for direction!

 

Having to rely on being told what is happening is no where the same as actually being at the truck and data logging yourself. If the op feels its tuning related and is close enough to drive to Jody it will be the best we can advise him to do at this point. If it is a glitch in the PCM Reflashing it over and over will not correct the issues he is having. The tunes will not cause the values to be twice what it is calling for. He's replaced injectors and a hpop. Jody has seen different side effects from dirty ipr's. Checking it is just a suggestion.

Diane